headphones

Abstract

Headphones characterized in that the headphones comprise a sound-generating part, a mounting part and an ear hook, wherein the ear hook connects the sound-generating part to the mounting part, wherein in a worn state the sound-generating part and the mounting part assume a clamping position on two sides of the helix and the sound-generating part lies in a cavum conchae;wherein the ear hook has a plane of symmetry provided in a longitudinal direction of the ear hook, wherein the attachment part comprises a first housing and a first microphone arranged in the first housing, wherein the first microphone detects a first sound via a first sound inlet opening in the first housing, wherein the sound generating part comprises a second housing and a second microphone arranged in the second housing, wherein a second sound inlet opening and a sound outlet opening are provided in the second housing, wherein the second microphone detects a second sound via the second sound inlet opening in the second housing, and wherein the headphones further comprise a processing circuit that performs noise reduction based on the first sound and the second sound.

Description

Technical field

[0001] The present application relates to the technical field of electronic devices, in particular headphones. State of the art

[0002] Headphones are widely used in everyday life. They can be used in conjunction with electronic devices such as mobile phones and computers to provide the user with sound playback. Clip-on headphones represent a new type of headphone; they are typically small and compact, clip onto the wearer's ear canal, and do not block the ear canal. This not only ensures safety in outdoor situations but also offers greater wearing comfort compared to in-ear headphones.

[0003] However, the sound recording quality of conventional ear clip headphones cannot meet the requirements. Disclosure of the invention

[0004] The embodiments of the present application provide a headphone comprising a sound-generating part, a mounting part, and an ear hook, wherein the ear hook connects the sound-generating part to the mounting part, wherein, in a worn state, the sound-generating part and the mounting part assume a clamping position on two sides of the helix, and the sound-generating part lies in a concave cavity; wherein the ear hook has a plane of symmetry provided in a longitudinal direction of the ear hook, wherein the mounting part comprises a first housing and a first microphone arranged in the first housing, wherein the first microphone detects a first sound via a first sound inlet opening in the first housing, and wherein the sound-generating part comprises a second housing and a second microphone arranged in the second housing.wherein the second microphone detects a second sound via a second sound inlet opening in the second housing, wherein the headphones further comprise a processing circuit that performs noise reduction based on the first sound and the second sound, wherein the headphones further comprise a first reference plane which, in the worn state, lies below the plane of symmetry and is parallel to the plane of symmetry, wherein the distance from the first reference plane to the plane of symmetry is less than or equal to 5 mm, wherein the first sound inlet opening has a sound inlet end located on an outer wall surface of the first housing; wherein the sound inlet end is located entirely on a side of the first reference plane facing the plane of symmetry.

[0005] In some embodiments, it is provided that the sound inlet end of the first sound inlet opening is located at least partially on the side of the plane of symmetry facing the first reference plane, wherein the maximum straight-line distance from an opening edge of the sound inlet end of the first sound inlet opening, which is located on the side of the plane of symmetry facing the first reference plane, to the plane of symmetry is less than or equal to 4 mm.

[0006] In some embodiments, the headphones are designed to support both a left-ear-worn state and a right-ear-worn state, with two first reference planes provided that are arranged symmetrically on two sides of the plane of symmetry, one of the first reference planes being located below the plane of symmetry in the left-ear-worn state of the headphones, the other of the first reference planes being located below the plane of symmetry in the right-ear-worn state of the headphones, and the sound inlet end of the first sound inlet opening being located completely between the two first reference planes.

[0007] In some embodiments, two first sound inlet openings are provided, wherein the sound inlet ends of the two first sound inlet openings are arranged on both sides of the plane of symmetry and are each completely located between the two first reference planes.

[0008] In some embodiments, the sound entry ends of the two first sound entry openings are arranged symmetrically to the plane of symmetry.

[0009] In some embodiments, the number of first microphones is one, wherein the first microphone detects the first sound via the two first sound inlet openings, wherein the sound inlet ends of the two first sound inlet openings are spaced apart from each other and the two first sound inlet openings are in communication with each other.

[0010] In some embodiments, the sound inlet end of the first sound inlet opening is located entirely on one side of the plane of symmetry facing away from the first reference plane.

[0011] In some embodiments, it is provided that the minimum straight-line distance from the opening edge of the sound inlet end of the first sound inlet opening to the plane of symmetry is greater than or equal to 5 mm.

[0012] In some embodiments, the second sound inlet opening has a sound inlet end located on an outer wall surface of the second housing, wherein the minimum straight-line distance from an opening edge of the sound inlet end of the second sound inlet opening to the opening edge of the sound inlet end of the first sound inlet opening is greater than or equal to 15 mm.

[0013] In some embodiments, it is provided that, in the width direction of the ear hook, the sound entry end of the first sound entry opening and the sound entry end of the second sound entry opening are each arranged to overlap the ear hook at least partially.

[0014] In some embodiments, the first sound inlet opening has a first axis direction pointing towards the outside of the first housing, the second sound inlet opening has a second axis direction pointing towards the outside of the second housing, and the angle between an orthogonal projection of the first axis direction onto the plane of symmetry and an orthogonal projection of the second axis direction onto the plane of symmetry is greater than or equal to 115 degrees.

[0015] In some embodiments, the first housing comprises a main body and a transition section, wherein the transition section is arranged on an outer circumferential surface of the main body and is connected to the ear hook, wherein the transition section is designed to taper in a direction away from the main body in order to smoothly connect the ear hook to the outer surface of the main body; wherein the first microphone is arranged in the transition section and the first sound inlet opening is arranged on the transition section.

[0016] In some embodiments, the processing circuit is further configured to detect wind noise based on the first sound and / or the second sound, and after detecting wind noise that is greater than or equal to a preset threshold, to switch the first microphone to an operating state and the second microphone to a non-operating state.

[0017] The present application has the following advantageous effects: By arranging the sound inlet end of the first sound inlet opening entirely on the side of the first reference plane facing the plane of symmetry, the position of the sound inlet end of the first sound inlet opening is limited. This allows, on the one hand, the sound inlet end of the first sound inlet opening to be further obscured by the user's helix when the headphones are worn. On the other hand, the second sound inlet opening, which is located on the sound-generating part, is closer to the user's mouth and is not obscured, thereby increasing the magnitude of the difference between the sound introduced through the first sound inlet opening and the sound introduced through the second sound inlet opening.The difference between the first sound captured by the first microphone and the second sound captured by the second microphone is increased. Furthermore, a line connecting the first and second sound inlets is designed to have better directional characteristics towards the mouth, further increasing the difference in sound pickup between the first and second microphones. This improves the noise reduction effect achieved by the processing circuit using the first and second sounds, enhances the headphone's sound pickup quality, and improves the user experience. Brief description of the drawings Fig. Figure 1 shows a schematic view of an embodiment of a headphone according to the present application, which is worn on a human ear in a worn state; Fig. Figure 2 shows a schematic front view of the headphone's structure. Fig. 1; Fig. Figure 3 shows a schematic perspective view of the headphone's structure. Fig. 1; Fig. Figure 4 shows a schematic top view of the headphone structure. Fig. 1; Fig. Figure 5 shows another schematic top view of the headphone structure. Fig. 1; Fig. Figure 6 shows a schematic sectional view of the headphone's structure. Fig. 5 along the intersection line VV; Fig. Figure 7 shows an enlarged schematic view of sub-area Z of the headphones. Fig. 4; Fig. Figure 8 shows another schematic top view of the headphone structure. Fig. 1; Fig. Figure 9 shows a schematic outline of the section along the section line VV. Fig. 6; Fig. Figure 10 shows another schematic top view of the structure of the headphones. Fig. 1; Fig. Figure 11 shows another schematic top view of the structure of the headphones. Fig. 1; Fig. Figure 12 shows another schematic perspective view of the structure of the headphones. Fig. 1; Fig. Figure 13 shows a schematic block diagram of the circuit structure of the exemplary embodiment of the headphones. Fig. 1; Fig. Figure 14 shows a schematic front view of the structure of the sound-generating part made of Fig. 2; Fig. Figure 15 shows a schematic sectional view of the structure of the sound-generating part. Fig. 11 along the intersection line AA; Fig. Figure 16 shows another schematic sectional view of the headphone structure. Fig. 5 along the intersection line VV. Detailed descriptions

[0018] The present invention is described in more detail below with reference to specific embodiments in combination with the accompanying drawings. Similar elements in different embodiments are identified by linked, similar reference numerals. Many details are described in the following embodiments to facilitate a better understanding of the present application. However, a person skilled in the art will readily recognize that some of these features may be omitted or replaced by other elements, materials, or processes under certain circumstances. In some cases, some of the related processes of the present application are not shown or described in the description to avoid overwhelming the core elements of the present application with excessive description.A detailed description of these related processes is not required for the person skilled in the art, since the person skilled in the art can fully understand these related processes based on the explanations in the description and the general technical knowledge in this field.

[0019] Furthermore, the features, processes, or properties described in the description can be combined in any suitable way to form different embodiments. At the same time, the steps or actions in the process descriptions can also be rearranged or adapted in a manner obvious to a person skilled in the art. Therefore, the various sequences in the description and the figures serve only to clearly illustrate a particular embodiment and are not to be considered mandatory unless it is expressly stated that a specific sequence must be followed.

[0020] The serial numbers assigned to the components herein, such as "first," "second," etc., serve only to distinguish the described objects and have no sequential or technical significance. Unless otherwise specified, the terms "connect" and "couple" used in this application include both direct and indirect connections (couplings).

[0021] As in Fig. As shown in Figure 1, a user's ear (EAR) can comprise physiological parts such as an external auditory canal (E11), a cavum conchae (E12), a cymba conchae (E13), a fossa triangularis (E14), an antihelix (E15), a scapha (E16), a helix (E17), and an antitragus (E18). Although the external auditory canal (E11) has a certain depth and extends to the tympanic membrane of the ear (EAR), for the sake of simplicity, the external auditory canal (E11) of the present application refers to the external auditory canal (E11) in conjunction with Fig. 1, unless otherwise specified, specifically referring to its entrance facing away from the tympanic membrane (i.e., an ear opening). Furthermore, it is provided that the physiological parts such as the cavum conchae E12, the cymba conchae E13, and the fossa triangularis E14 have a certain volume and depth, and that the cavum conchae E12 is in direct communication with the external auditory canal E11, i.e., that the aforementioned ear opening can simply be considered as lying at the bottom of the cavum conchae E12.

[0022] Furthermore, it is provided that a tragus E19 is present on the outer circumference of the external auditory canal of the ear (EAR). Compared to parts such as the cavum conchae E12, the cymba conchae E13, and the fossa triangularis E14, the tragus E19 has a certain depth and volume in three-dimensional space. This means that these parts are each recessed towards the user's head, towards a posterior aspect of the ear (EAR), while the tragus E19 protrudes away from the user's head, towards an anterior aspect of the ear (EAR). Here, the "anterior aspect of the ear (EAR)" is a relative concept to the "posterior aspect of the ear (EAR)," the former being a side of the ear (EAR) facing away from the head, as described in... Fig. 1 shown, denoted and the latter denotes a head-facing side of the ear EAR, with both referring to the user's ear EAR.

[0023] Furthermore, it is anticipated that individual differences may exist between users, resulting in varying shapes, sizes, and other dimensions of the ear EAR. To simplify the description and reduce (or even eliminate) these individual differences between users, a simulator with a head and associated ears EAR (a left and a right ear), e.g., GRAS45BCKEMAR, can be manufactured in accordance with the standards ANSI:S3.36, S3.25 and IEC:603187. Consequently, expressions such as "a user is wearing headphones," "the headphones are in the worn state," and "in the worn state" can mean that the headphones described in the present application are worn on the ear EAR of the aforementioned simulator.Naturally, the headphones may exhibit some difference when worn by different users compared to the state they were in when worn on the ear of the aforementioned simulator, precisely because individual differences exist between users. However, this difference should be tolerated.

[0024] It should be noted that in fields such as medicine and anatomy, three fundamental sectional planes—including a sagittal plane, a coronal plane, and a horizontal plane—as well as three fundamental axes—including a sagittal axis, a coronal axis, and a vertical axis—of the human body can be defined. The sagittal plane is a sectional plane that runs perpendicular to the ground in the front-to-back direction of the body, dividing the human body into a left and a right half. The coronal plane is a sectional plane that runs perpendicular to the ground in the left-to-right direction of the body, dividing the human body into an anterior and a posterior half.The horizontal plane is a cross-sectional plane that runs parallel to the ground in the top-bottom direction of the body and divides the human body into an upper and a lower half. Accordingly, the sagittal axis is an axis that runs in the front-back direction of the body and is perpendicular to the coronal plane; the coronal axis is an axis that runs in the left-right direction of the body and is perpendicular to the sagittal plane; and the vertical axis is an axis that runs in the top-bottom direction of the body and is perpendicular to the horizontal plane. Furthermore, the “front of the ear EAR” mentioned in the present application is a relative concept to the “back of the ear EAR”, the former referring to a side of the ear EAR facing away from the head and the latter referring to a side of the ear EAR facing the head, both referring to the user’s ear EAR.When the ear EAR of the aforementioned simulator is viewed in the direction of the coronal axis of the human body, a [missing information] can be observed. Fig. The schematic view of an anterior profile of the ear (EAR) shown in Figure 1 can be obtained. Based on this, in conjunction with... Fig. 1. Three directions X, Y, and Z are simply considered as the coronal axis, the sagittal axis, and the vertical axis of the human body; where the three planes XY, XZ, and YZ can simply be considered as the horizontal plane, the coronal plane, and the sagittal plane of the human body.

[0025] An embodiment of the present application describes at least one exemplary structure of a headphone 1. As in Fig. 1 shown, shows Fig. 1. A condition in which the headphones 1 are worn on one ear of a user. The headphones 1 can be clip-on headphones. As in the Fig. 1, Fig. 2 to Fig. As shown in Figure 3, the headphones 1 comprise a sound-generating element 100 for insertion into a concha (cavum conchae) E12 of the user, a fitting element 300 for resting against the back of the user's ear, and an ear hook 200 for connecting the sound-generating element 100 to the fitting element 300. When worn, the ear hook 200 can wrap around the user's helix E17, with the sound-generating element 100 and the fitting element 300 assuming a clamping position on two sides of the user's helix E17, and the sound-generating element 100 being located in the concha (cavum conchae) E12. The sound-generating element 100 is a sound reproduction device used to convert electrical signals into acoustic signals and reproduce them for the wearer. The system part 300 and the sound generation part 100 assume a clamping position to hold the entire headphone 1 clamped to the user's ear EAR.In some embodiments, components such as a battery, a circuit board, etc., can be arranged in the system section 300. Of course, the system section 300 can also be used without a battery, while a battery is installed in the sound-generating section 100.

[0026] In some embodiments, the ear hook 200, as in Fig. Figure 4 shows a plane of symmetry A1, which is provided in a longitudinal direction F1 of the earpiece 200. Specifically, the plane of symmetry A1 of the earpiece 200 runs in the longitudinal direction F1 of the earpiece 200, and the parts of the earpiece 200 on both sides of the plane of symmetry A1 exhibit the smallest difference or are identical. That is, if the earpiece 200 is regularly symmetrical, the parts of the earpiece 200 on both sides of the plane of symmetry A1 are identical; if the earpiece 200 is not strictly symmetrical, the difference between the parts of the earpiece 200 on both sides of the plane of symmetry A1 should be the smallest for all types of subdivision, the magnitude of which can be distinguished, for example, by observing the projection of the earpiece 200 onto a plane perpendicular to the plane of symmetry A1.

[0027] Optionally, the system component includes 300, as in the Fig. 4, Fig. 5 and Fig. Figure 6 shows a first housing 31 and a first microphone 32 arranged in the first housing 31, wherein the first microphone 32 detects a first sound via a first sound inlet opening 3101 on the first housing 31. The sound generation part 100 comprises a second housing 11 and a second microphone 12 arranged in the second housing 11, wherein the second microphone 12 detects a second sound via a second sound inlet opening 1101 on the second housing 11. The headphones 1 further comprise a processing circuit 400, which performs noise reduction based on the first and second sounds. The headphones 1 also have a first reference plane A2, which, when worn, lies below the plane of symmetry A1 and is parallel to the plane of symmetry A1. The distance from the first reference plane A2 to the symmetry plane A1 is less than or equal to 5 mm, for example 1 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm etc.The first sound inlet opening 3101 has a sound inlet end 301 located on an outer wall surface of the first housing 31, wherein an external sound is directed from the sound inlet end 301 into the first sound inlet opening 3101 and transmitted via the first sound inlet opening 3101 to the first microphone 32, wherein the sound inlet end 301 of the first sound inlet opening 3101 is located entirely on a side of the first reference plane A2 facing the plane of symmetry A1.

[0028] The processing circuit 400 can perform noise reduction based on the first and second sound signals. For example, by positioning the first sound inlet 3101 and the second sound inlet 1101 at different locations, the sounds introduced by the two signals can have a certain difference, so that the sounds captured by the first microphone 32 and the second microphone 12 have different signal amplitudes in the primary sound reception frequency band, where the primary sound reception frequency band can be, for example, a frequency band for capturing human voices. This allows the processing circuit 400 to use the first and second sounds to detect and eliminate noise.

[0029] By positioning the sound inlet end 301 of the first sound inlet opening 3101 entirely on the side of the first reference plane A2 facing the plane of symmetry A1, the position of the sound inlet end 301 of the first sound inlet opening 3101 is limited. This allows the sound inlet end 301 of the first sound inlet opening 3101 to be further obscured by the user's helix E17 when the headphones 1 are worn. The second sound inlet opening 1101, located on the sound-generating part 100, is closer to the user's mouth and is not obscured, thus increasing the degree of difference between the sound introduced through the first sound inlet opening 3101 and the sound introduced through the second sound inlet opening 1101; i.e.,The difference between the first sound captured by the first microphone 32 and the second sound captured by the second microphone 12 is increased, which contributes to improving the noise reduction effect of the processing circuit 400 by utilizing both the first and second sounds. Furthermore, it allows a line connecting the first sound inlet 3101 to the second sound inlet 1101 to have better directionality towards the mouth, thus improving the sound pickup quality of the headphones 1 and enhancing the user experience.

[0030] Optionally, the sound inlet end 301 is located at the first sound inlet opening 3101, as shown in Fig. 4 shown, at least partially on one of the sides of the plane of symmetry A1 facing the first reference plane A2, wherein the maximum straight-line distance L1 from an opening edge of the sound inlet end 301 of the first sound inlet opening 3101, which is located on the side of the plane of symmetry A1 facing the first reference plane A2, to the plane of symmetry A1 is less than or equal to 4 mm, and can be, for example, 0.5 mm, 1 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, etc., and can, of course, also take on other values.

[0031] With reference to Fig. 1. The user's helix E17 has an overall outwardly curved arc shape, with the upper part being more strongly curved outwards along the vertical axis of the human body than the lower part. Therefore, when worn: the higher the sound inlet end 301 of the first sound inlet opening 3101 is located, the more the first sound inlet opening 3101 is obscured by the outwardly curved helix E17 of the user, and the greater the difference between the first sound detected by the first microphone 32 and the second sound detected by the second microphone 12, which is more advantageous for improving the noise reduction effect.

[0032] By setting the maximum straight-line distance L1 from the opening edge of the sound inlet end 301 of the first sound inlet opening 3101, which is located on the side of the plane of symmetry A1 facing the first reference plane A2, to the plane of symmetry A1 to less than or equal to 4 mm, the outwardly curved helix E17 of the user can better cover the first sound inlet opening 3101 when worn, the line connecting the first sound inlet opening 3101 and the second sound inlet opening 1101 also has better directivity towards the mouth, which contributes to increasing the difference between the first sound detected by the first microphone 32 and the second sound detected by the second microphone 12.

[0033] Headphone 1 is optional, as shown in Fig. Figure 7 is designed to support both a left-ear and a right-ear wearing state. That is, the headphones 1 can be worn on either the user's left or right ear. There are two first reference planes A2 arranged symmetrically on either side of the plane of symmetry A1, with one of the first reference planes A2 lying below the plane of symmetry A1 when the headphones 1 are worn on the left ear, and the other of the first reference planes A2 lying below the plane of symmetry A1 when the headphones 1 are worn on the right ear, and the sound inlet end 301 of the first sound inlet opening 3101 being located entirely between the two first reference planes A2.

[0034] The headphone 1 is not limited to being worn only on the left ear or only on the right ear, but is designed to be worn on either ear. This means that when the user switches the headphone 1 from being worn on the left ear to the right ear, or vice versa, the state of the headphone 1 relative to the ear EAR remains unchanged. Specifically, the orientation or position of a sound outlet 1102 and a pressure relief opening 1103 on the headphone 1 relative to the external ear canal E11 remains unchanged, and there is no visual difference when the headphone is worn on the left or right ear. Furthermore, the headphone 1 is designed to automatically detect the ear EAR on which it is worn and to use adapted control logic to change the function of the headphone 1 when worn on different ears EAR, such as...the selection of the left or right audio channel or the switching of touch functions. By positioning the sound inlet end 301 of the first sound inlet opening 3101 completely between the two first reference planes A2, the sound inlet end 301 of the first sound inlet opening 3101 can be further obscured by the user's helix E17, regardless of whether the headphones 1 are worn on the left or right ear; moreover, it is ensured that the line connecting the first sound inlet opening 3101 and the second sound inlet opening 1101 has better directional characteristics towards the mouth, so that the headphones 1 can achieve a good noise cancellation effect regardless of whether they are worn on the left or right ear.This is advantageous in order to improve the sound recording quality of the headphones 1 and to increase the consistency of the headphones 1 when worn on the left ear and when worn on the right ear, which in turn contributes to improving the user experience.

[0035] Optional are, as in Fig. Figure 7 shows two first sound inlet openings 3101, wherein the sound inlet ends 301 of the two first sound inlet openings 3101 are arranged on either side of the plane of symmetry A1 and are each located entirely between the two first reference planes A2. When the headphone 1 is worn on the left or right ear, the relative positions of the first sound inlet openings 3101 and the ear EAR are close together or even nearly identical. This allows the headphone 1 to achieve a comparatively similar noise reduction effect when switching between the left and right ear, which helps to improve the sound recording quality of the headphone 1 and the user experience.

[0036] Optional are, as in Fig. Figure 7 shows that the sound inlet ends 301 of the two first sound inlet openings 3101 are arranged symmetrically to the plane of symmetry A1. This ensures that the headphone 1 achieves the same noise reduction effect when switching between the left and right ear. Furthermore, the symmetrical arrangement also contributes to improving the aesthetic appearance.

[0037] Optional is, as in Fig. 3 or Fig. Figure 4 shows the number of first microphones 32, wherein the first microphone 32 detects the first sound via the two first sound inlet openings 3101, the sound inlet ends 301 of the two first sound inlet openings 3101 being spaced apart from each other and the two first sound inlet openings 3101 being in communication with each other. The two communicating first sound inlet openings 3101 are advantageous for maintaining air pressure equalization. In particular, an airflow can enter through one of the first sound inlet openings 3101 and exit through the other first sound inlet opening 3101. This contributes to reducing wind noise in the first sound detected by the first microphone 32, simplifies the structure, and can save installation space.

[0038] In some embodiments, the number of first sound inlet openings 3101 can also be one, and the plane of symmetry A1 passes through the first sound inlet opening 3101. In this way, the headphones 1 can achieve the same noise reduction effect regardless of whether they are worn on the left or right ear. In this case, regardless of whether they are worn on the left or right ear, the sound inlet end 301 of the first sound inlet opening 3101 can be further obscured by the user's helix E17; furthermore, the line connecting the first sound inlet opening 3101 and the second sound inlet opening 1101 has better directional characteristics towards the mouth. This contributes to improving the noise reduction effect, the sound recording quality of the headphones 1, and the user experience.

[0039] Furthermore, in some embodiments, the number of first microphones 32 can also be two, with each first microphone 32 being assigned to a first sound inlet opening 3101. No restrictions are specified in this regard in the present application, and the person skilled in the art can make decisions based on actual needs.

[0040] Optionally, the headphones can be used as described in section 1. Fig. As shown in Figure 8, the headphone 1 is designed to support either the left-ear or the right-ear wearing state. The sound inlet end 301 of the first sound inlet opening 3101 is located entirely on the side of the plane of symmetry A1 facing away from the first reference plane A2, in order to improve the effect of the user's helix E17 occluding the sound inlet end 301 of the first sound inlet opening 3101 when the headphone 1 is worn. Furthermore, the line connecting the first sound inlet opening 3101 and the second sound inlet opening 1101 is directed more closely towards the mouth. This helps to increase the degree of difference between the sound introduced through the first sound inlet opening 3101 and the sound introduced through the second sound inlet opening 1101, which in turn improves the noise reduction effect of the headphone 1.

[0041] Optional, as in Fig. Figure 8 shows that the minimum straight-line distance L2 from the opening edge of the sound inlet end 301 of the first sound inlet opening 3101 to the plane of symmetry A1 is greater than or equal to 5 mm. For example, it can be 5.5 mm, 6 mm, 6.5 mm, 7 mm, etc., and can, of course, also take on other values. If two communicating first sound inlet openings 3101 are provided, the minimum straight-line distance L2 refers to the minimum straight-line distance from the opening edge of the first sound inlet opening 3101 that is closer to the plane of symmetry A1 to the plane of symmetry A1, or to the smaller of the minimum straight-line distances from the opening edges of the two first sound inlet openings 3101 to the plane of symmetry A1.

[0042] By setting the minimum straight-line distance L2 from the opening edge of the sound inlet end 301 of the first sound inlet opening 3101 to the plane of symmetry A1 to greater than or equal to 5 mm, the sound inlet end 301 of the first sound inlet opening 3101 is moved further away from the plane of symmetry A1, which helps to improve the effect of the covering of the sound inlet end 301 of the first sound inlet opening 3101 by the user's helix E17 when the headphones 1 are worn, so that the line connecting the first sound inlet opening 3101 and the second sound inlet opening 1101 is better directed towards the mouth, which is advantageous for improving the noise reduction effect of the headphones 1.

[0043] Optional includes, as in Fig. As shown in Figure 8, the first housing 31 comprises a main body 311, the main body 311 comprising a circumferential side wall 3111 and two opposing end walls 3112, the circumferential side wall 3111 being used to contact the rear of the helix E17, the first sound inlet opening 3101 also being arranged on the circumferential side wall 3111, specifically on a side of the circumferential side wall 3111 facing away from the sound-generating part 100. In some embodiments, the first sound inlet opening 3101 can be arranged on the end wall 3112. No restrictions are specified in this regard in the present application, and the person skilled in the art can make decisions based on actual needs. Optionally, as shown in Figure 8, the first housing 3101 is arranged on the end wall 3112. Fig. Figure 6 shows the second sound inlet opening 1101 having a sound inlet end 101 located on an outer wall surface of the second housing 11, wherein the minimum straight-line distance L3 from an opening edge of the sound inlet end 101 of the second sound inlet opening 1101 to the opening edge of the sound inlet end 301 of the first sound inlet opening 3101 is greater than or equal to 15 mm, for example 15 mm, 18 mm, 20 mm, 30 mm etc. and can of course also assume other values.

[0044] By setting the minimum straight-line distance L3 from the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 to the opening edge of the sound inlet end 301 of the first sound inlet opening 3101 to greater than or equal to 15 mm, the difference between the first sound detected by the first microphone 32 and the second sound detected by the second microphone 12 is increased. This contributes to improving the noise reduction effect of the processing circuit 400 using the first and second sounds, the sound recording quality of the headphones 1, and the user experience.

[0045] Optional are, as in Fig. 4 and Fig. 5 shown, in the width direction F2 of the ear hook 200 the sound entry end 301 of the first sound entry opening 3101 and the sound entry end 101 of the second sound entry opening 1101 are each arranged at least partially overlapping with the ear hook 200.

[0046] Specifically, the plane of symmetry A1 is perpendicular to the width direction F2 of the ear hook 200. Using a straight line perpendicular to the plane of symmetry A1 and parallel to the width direction F2 of the ear hook 200 as the reference line A3, it is provided that the ear hook 200, when projected along the plane of symmetry A1 onto the reference line A3, has a first projection width S1; the sound entry end 301 of the first sound entry opening 3101, when projected along the plane of symmetry A1 onto the reference line A3, has a second projection width S2; and the sound entry end 101 of the second sound entry opening 1101, when projected along the plane of symmetry A1 onto the reference line A3, has a third projection width S3, wherein the second projection width S2 and the third projection width S3 each overlap at least partially with the first projection width S1 overlap,so that the ear hook 200 can form a barrier between the sound entry end 301 of the first sound entry opening 3101 and the sound entry end 101 of the second sound entry opening 1101, thereby increasing the difference between the first sound detected by the first microphone 32 and the second sound detected by the second microphone 12, which contributes to improving the noise reduction effect of the headphones 1.

[0047] Optionally, as in Fig. Figure 9 shows the first sound inlet opening 3101 having a first axis direction F3 pointing towards the outside of the first housing 31, the second sound inlet opening 1101 having a second axis direction F4 pointing towards the outside of the second housing 11, wherein an angle J1 between an orthogonal projection of the first axis direction F3 onto the plane of symmetry A1 and an orthogonal projection of the second axis direction F4 onto the plane of symmetry A1 is greater than or equal to 115 degrees, for example 115 degrees, 120 degrees, 125 degrees, 130 degrees etc. and can of course also take on other values.

[0048] The first axis direction F3 of the first sound inlet opening 3101 can be specifically determined by the following procedure: If a reference cylinder, whose dimensions are adapted to the dimensions of the first sound inlet opening 3101, is inserted into the first sound inlet opening 3101, the axis direction of this reference cylinder is the first axis direction F3 of the first sound inlet opening 3101. It should be noted that the "adapted dimensions" described here mean that the reference cylinder can be inserted precisely into the first sound inlet opening 3101 and does not easily fall out.

[0049] Regarding the procedure for determining the second axis direction F4 of the second sound inlet opening 1101, reference can be made to the determination of the first axis direction F3 of the first sound inlet opening 3101, which is not repeated here.

[0050] By setting the angle J1 between the orthogonal projection of the first axis direction F3 onto the plane of symmetry A1 and the orthogonal projection of the second axis direction F4 onto the plane of symmetry A1 to greater than or equal to 115 degrees, a certain difference arises in the orientation of the first sound inlet 3101 and the second sound inlet 1101, which also results in a certain difference in the sounds introduced via the two, which further increases the difference between the first sound detected by the first microphone 32 and the second sound detected by the second microphone 12 and contributes to improving the noise reduction effect of the headphone 1.

[0051] Optional includes, as in Fig. 4 and Fig. Figure 8 shows the first housing 31 comprising a main body 311 and a transition section 312, wherein the transition section 312 is arranged on the outer circumferential surface of the main body 311 and is connected to the ear hook 200, the transition section 312 being designed to taper in a direction away from the main body 311 in order to smoothly connect the ear hook 200 to the outer surface of the main body 311. The first microphone 32 is arranged in the transition section 312, with the first sound inlet 3101 being located on the transition section 312 in order to fully utilize the space of the transition section 312, which contributes to improved space utilization of the headphones 1 and makes the structure of the headphones 1 more compact.

[0052] Optionally, the processing circuit 400 is further configured to detect wind noise based on the first sound and / or the second sound, and after detecting wind noise greater than or equal to a preset threshold, to switch the first microphone 32 to an operating state and the second microphone 12 to a non-operating state. An "operating state" means that a microphone is switched on and the sound it detects is usable by the processing circuit 400, while a "non-operating state" means that this microphone is switched off, or that the microphone is switched on, but the sound it detects is not used by the processing circuit 400.

[0053] The feature “that the processing circuit 400 detects wind noise based on the first sound and / or the second sound” means that the processing circuit 400 assesses, by detecting sound signal features in the first sound and / or the second sound, whether features of a wind noise signal are present in the sound signal features in order to detect the presence and intensity of wind noise.

[0054] Since the sound inlet end 301 of the first sound inlet opening 3101 is further obscured by the user's helix E17 when worn, and the sound inlet end 101 of the second sound inlet opening 1101 is not obscured, the wind noise in the sound introduced via the second sound inlet opening 1101 is greater than in the sound introduced via the first sound inlet opening 3101. Therefore, when the processing circuit 400 detects wind noise greater than or equal to a preset threshold, it switches the first microphone 32 to an operating state and the second microphone 12 to a non-operating state to prevent the second microphone 12 from capturing sound with excessive wind noise and thus impairing the sound recording quality of the headphones 1. This contributes to an improved user experience.

[0055] In some embodiments, as in Fig. Figure 5 shows the system component 300 comprising two first microphones 32, each used to detect a first sound, and the sound generation component 100 comprising a second microphone 12, which is used to detect a second sound. The headphones 1 further comprise a detection element 500 and the processing circuit 400, the detection element 500 being used to detect the relative positional relationship of the two first microphones 32 when worn, this relative positional relationship being able to refer to the relative height relationship between the two first microphones 32 in the direction of gravity F5 when worn.Depending on the detection result of the detection element 500, the processing circuit 400 controls one of the two first microphones 32, which is located relatively higher in the direction of gravity F5, into an operating state and the other, which is located relatively lower in the direction of gravity F5, into a non-operating state, and also performs noise suppression based on the first sound detected by the first microphone 32 in the operating state and the second sound detected by the second microphone 12.

[0056] In this context, an “operating state” means that a microphone is switched on and the sound it detects can be used by the processing circuit 400, while a “non-operating state” means that this microphone is switched off, or that the microphone is switched on, but the sound it detects is not used by the processing circuit 400.

[0057] On the one hand, when the headphones are worn: the higher the first microphone 32 is positioned, the more easily it is obscured by the Helix E17, which increases the difference in sound pickup between the first microphone 32 and the second microphone 12. On the other hand, when the headphones are worn: the higher the first microphone 32 is positioned, the better the line connecting the first microphone 32 and the second microphone 12 can be directed towards the mouth, which also increases the difference in sound pickup between the first microphone 32 and the second microphone 12.Therefore, the arrangement of two first microphones 32 ensures that, regardless of whether the headphones 1 are worn on the left or right ear, the microphone 32 located relatively higher in the direction of gravity F5 is always operational. This is advantageous for increasing the difference between the first sound detected by the first microphone 32 and the second sound detected by the second microphone 12, thus improving the noise reduction effect of the headphones 1. This ensures the sound recording quality of the headphones 1 while also enabling the function of switching the headphones 1 between the left and right ear, thereby enhancing the user experience.

[0058] Optional includes, as in Fig. Figure 10 shows the ear hook 200 having a plane of symmetry A1, which is provided in the longitudinal direction F1 of the ear hook 200, wherein the attachment part 300 further comprises a first housing 31, wherein two first sound inlet openings 3101 are arranged on the first housing 31, wherein each first microphone 32 detects the first sound via a corresponding first sound inlet opening 3101, wherein the two first sound inlet openings 3101 each have a sound inlet end 301 which is located on the outer wall surface of the first housing 31, wherein the sound inlet ends 301 of the two first sound inlet openings 3101 are arranged on both sides of the plane of symmetry A1.

[0059] By providing a corresponding first sound inlet opening 3101 for each first microphone 32 of the two first microphones 32 and by arranging the sound inlet ends 301 of the two first sound inlet openings 3101 on both sides of the plane of symmetry A1, it is made possible that, when the first microphone 32, which is located relatively higher in the direction of gravity F5, i.e. the microphone 32 located above the plane of symmetry A1, is in an operating state, the sound inlet end 301 of its corresponding first sound inlet opening 3101 is also located above the plane of symmetry A1.In this way, regardless of whether the headphone 1 is worn on the left or right ear, the user's Helix E17 can further obscure the first microphone 32 when in operation, with the line connecting the first microphone 32 when in operation to the second microphone 12 being directed more towards the mouth, thereby increasing the difference between the first sound captured by the first microphone 32 and the second sound captured by the second microphone 12, improving the noise reduction effect of the headphone 1, and ensuring the sound recording quality of the headphone 1 when implementing the function to switch the headphone 1 between the left and right ear, thus contributing to an improved user experience.

[0060] Optional are, as in Fig. Figure 10 shows the sound inlet ends 301 of the two first sound inlet openings 3101 arranged symmetrically to the plane of symmetry A1 to ensure that when switching the headphones 1 between the left and right ear, the two first sound inlet openings 3101 can achieve the same sound induction effect, thus enabling the headphones 1 to achieve good noise reduction regardless of whether they are worn on the left or right ear. This also contributes to improving the aesthetics of the headphones 1.

[0061] Optional includes, as in Fig. As shown in Figure 10, the first housing 31 comprises a main body 311, the main body 311 including a circumferential side wall 3111 and two opposing end walls 3112, the circumferential side wall 3111 being used to contact the rear of the helix E17, the two first sound inlet openings 3101 being arranged on the two end walls 3112 of the attachment part 300, thereby further improving the effect of the user's helix E17 covering the first sound inlet opening 3101, which corresponds to the first microphone 32 in the operating state, in the worn state, so that the line connecting the first microphone 32 in the operating state to the second microphone 12 can be directed more effectively towards the mouth. This effectively increases the difference between the first sound and the second sound, which is advantageous for the processing circuit 400 to achieve a good noise reduction effect.

[0062] Optional, as in Fig. Figure 10 shows that, in a direction F6 perpendicular to the plane of symmetry A1, the shortest straight-line distance L4 between the opening edges of the sound inlet ends 301 of the two first sound inlet openings 3101 is greater than or equal to 10 mm. For example, it can be 11 mm, 12 mm, 13 mm, 15 mm, 18 mm, 20 mm, etc., and can of course also take on other values.

[0063] By setting the shortest straight-line distance L4 between the opening edges of the sound inlet ends 301 of the two first sound inlet openings 3101 to greater than or equal to 10 mm, a certain distance is created between the two first sound inlet openings 3101. In this way, when the headphones 1 are worn, the first sound inlet opening 3101, which corresponds to the first microphone 32 in the operating state, can be better concealed by the user's helix E17, and the line connecting the first microphone 32 in the operating state with the second microphone 12 can be better directed towards the mouth. This helps to increase the difference between the sounds captured by the first microphone 32 and the second microphone 12 and to improve the noise reduction effect of the headphones 1.

[0064] Optional, as in Fig. Figure 10 shows the shortest straight-line distance L5 from the opening edges of the sound inlet ends 301 of the two first sound inlet openings 3101 to the plane of symmetry A1, each greater than or equal to 5 mm. For example, it can be 5.5 mm, 6 mm, 8 mm, 10 mm, 15 mm, etc., and can of course also take on other values.

[0065] This creates a certain distance between the sound inlet ends 301 of the two first sound inlet openings 3101 and the plane of symmetry A1. In this way, when the headphones 1 are worn, the first sound inlet opening 3101, which corresponds to the first microphone 32 in its operating state, can be better concealed by the user's helix E17, thus increasing the difference between the sounds captured by the first microphone 32 and the second microphone 12. Furthermore, the line connecting the first microphone 32 in its operating state to the second microphone 12 can be directed more effectively towards the mouth, thereby improving the noise reduction effect of the headphones 1.

[0066] Optional are, as in Fig. Figure 11 shows the first two sound inlet openings 3101 arranged on the circumferential side wall 3111 of the system part 300, specifically on the side of the circumferential side wall 3111 facing away from the sound generating part 100.

[0067] Since at least one of the two end walls 3112 of the system part 300 is provided with an antenna for the wireless radio frequency connection of the headphones 1 and / or a touch area for touch control by a user, arranging the first sound inlet opening 3101 on the end wall 3112 can cause mutual interference between the antenna and / or the touch area and the first sound inlet opening. Therefore, arranging the first sound inlet opening 3101 on the circumferential side wall 3111 can effectively reduce the probability of mutual interference between the first sound inlet opening 3101 and the antenna and / or the touch area, thus helping to improve the stability and reliability of the operation of the headphones 1.

[0068] Optionally, the processing circuit 400 is configured to detect wind noise based on the first sound and / or the second sound. After detecting wind noise greater than or equal to a preset threshold, the processing circuit 400 further switches one of the two first microphones 32, which detects a first sound with less wind noise, to an operating state and the other of the two first microphones 32 to a non-operating state, so that the headphones 1 can receive the first sound with less wind noise, which helps to achieve good sound recording quality for the headphones 1 and improve the user experience.

[0069] Optionally, the processing circuit 400 is further configured to detect wind noise based on the first sound and / or the second sound. After detecting wind noise that is greater than or equal to a preset threshold, the processing circuit 400 also switches the other of the two first microphones 32, which is located relatively further down in the direction of gravity F5, to the operating state and the second microphone 12 to the non-operating state.

[0070] Since the sound inlet end 301 of the first sound inlet opening 3101 is further obscured by the user's helix E17 in the worn state, and the sound generating part 100 lies in the caveum conchae E12 and is not obscured, the wind noise in the sound detected by the second microphone 12 is greater than that in the sound detected by the first microphone 32, whereby after detecting a wind noise that is greater than or equal to the preset threshold, the processing circuit 400 can switch the second microphone 12 to a non-operating state and one of the two first microphones 32 to an operating state.Since the sound inlet end 301 of the first sound inlet opening 3101, which corresponds to that of the two first microphones 32 which is located relatively further down in the direction of gravity F5, is closer to the user's mouth, in some embodiments the first microphone 32 located relatively further down is put into an operating state alone, whereby the first sound detected by this first microphone 32 has less wind noise and at the same time can detect the voice emitted by the user as clearly and completely as possible, which helps to achieve good sound recording quality of the headphones 1 and to improve the user experience.

[0071] Optional includes, as in Fig. Figure 12 shows the sound-generating part 100 as a second housing 11, wherein a second sound inlet opening 1101 is arranged on the second housing 11, wherein the second microphone 12 detects the second sound via the second sound inlet opening 1101, wherein the second sound inlet opening 1101 has a sound inlet end 101 located on the outer wall surface of the second housing 11, wherein the minimum straight-line distance L3 from the opening edge of the sound inlet end 301 of the first sound inlet opening 3101 to the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 is greater than or equal to 15 mm, for example 15 mm, 17 mm, 20 mm, 25 mm etc. and can of course also assume other values.

[0072] By setting the minimum straight-line distance L3 from the opening edge of the sound inlet end 301 of the first sound inlet opening 3101 to the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 to greater than or equal to 15 mm, a certain difference between the sounds introduced via the first sound inlet opening 3101 and the second sound inlet opening 1101 is ensured, which helps to achieve good noise suppression by the processing circuit 400 and to improve the noise suppression effect of the headphones 1.

[0073] Optionally, as in Fig. Figure 12 shows the first sound inlet opening 3101 having a first axis direction F3 pointing towards the outside of the first housing 31, the second sound inlet opening 1101 having a second axis direction F4 pointing towards the outside of the second housing 11, wherein an angle between an orthogonal projection of the first axis direction F3 onto the plane of symmetry A1 and an orthogonal projection of the second axis direction F4 onto the plane of symmetry A1 is greater than or equal to 115 degrees, for example 115 degrees, 120 degrees, 125 degrees, 130 degrees, etc., and of course can also take on other values.

[0074] In this embodiment, the method for determining the first axial direction F3 of the first sound inlet opening 3101 and the second axial direction F4 of the second sound inlet opening 1101 can be the same as or similar to the method in the embodiment described above and is not described again here.

[0075] By setting the angle between the orthogonal projection of the first axis direction F3 onto the plane of symmetry A1 and the orthogonal projection of the second axis direction F4 onto the plane of symmetry A1 to greater than or equal to 115 degrees, the first sound inlet 3101 and the second sound inlet 1101 point in different directions, thereby ensuring a certain difference between the sounds introduced through the first sound inlet 3101 and the second sound inlet 1101, effectively increasing the difference between the first sound and the second sound, which contributes to improving the noise reduction effect of the headphone 1.

[0076] Optional includes, as in Fig. 5 and Fig. Figure 13 shows the headphones 1 and a switching component 600. The first two microphones 32 are connected via the switching component 600 to the same audio input of the processing circuit 400. Depending on the detection result of the detection element 500, the processing circuit 400 controls the microphone 32 that is located relatively higher in the direction of gravity F5, connecting it to the processing circuit 400 and thus putting it into an operating state. It also disconnects the other microphone, which is located relatively lower in the direction of gravity F5, from the processing circuit 400 to put it into a non-operating state.

[0077] The arrangement of the switching component 600 facilitates the processing circuit 400 controlling the switching between the first two microphones 32 depending on the detection result of the detection element 500, which contributes to increasing the switching efficiency and reliability of the headphones 1.

[0078] In some embodiments, switching between the first two microphones 32 can be accomplished solely by software. This is understood by those skilled in the art and will not be described again here.

[0079] In some embodiments, as in Fig. 6 and Fig. Figure 9 shows the sound-generating part 100 as comprising a housing, a microphone, and a sound-generating arrangement 13 arranged in the housing, wherein the housing can be the second housing 11 described above, and wherein the microphone can be the second microphone 12 described above. A sound inlet and a sound outlet 1102 are arranged on the second housing 11, wherein the sound inlet can be the second sound inlet 1101 described above, the second microphone 12 detecting external sound via the second sound inlet 1101, and the sound emitted by the sound-generating arrangement 13 being transmitted to the outside via the sound outlet 1102. The second sound inlet 1101 can be used to introduce sound into the second microphone 12, and the second microphone 12 can be used to detect the introduced sound.The second sound inlet opening 1101 has a sound inlet end 101 located on an outer wall surface of the second housing 11. The sound outlet opening 1102 has a first sound outlet end 102 located on an outer wall surface of the second housing 11. As in . Fig. As shown in Figure 9, a first shortest straight line segment L6 exists between an opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and an opening edge of the first sound outlet end 102. The length of the first shortest straight line segment L6 is greater than or equal to 9 mm, and can, for example, be 9 mm, 10 mm, 12 mm, 15 mm, etc., and can, of course, also take on other values.

[0080] Since sound propagation follows the inverse square law, i.e., the intensity of the sound is inversely proportional to the square of the distance from the sound source, the intensity of the sound decreases with increasing distance from the sound source. By setting the length of the first shortest straight line segment L6 to greater than or equal to 9 mm, it is effectively prevented that the sound transmitted outwards from the sound outlet opening 1102 is directed into the second sound inlet opening 1101 and thus interferes with the sound captured by the second microphone 12. This effectively reduces the probability of echoes occurring when a user uses the headphones 1 for making calls, thus improving the user's call experience.

[0081] Optional, as in Fig. As shown in Figure 9, a shortest wall-surface connection line exists along the outer wall surface of the second housing 11 between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the first sound outlet end 102. This shortest wall-surface connection line has the same endpoints as the first shortest straight line segment L6 and is designated as the first shortest wall-surface connection line L7. Specifically, the first shortest wall-surface connection line L7 is a shortest arc segment formed along a contour line of the outer wall surface of the second housing 11 between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the first sound outlet end 102. The first shortest wall-surface connection line L7 is designed to project towards the outside of the second housing 11.The length of the first shortest wall surface connection line L7 is greater than or equal to 13 mm, can be, for example, 13 mm, 15 mm, 18 mm, 20 mm, etc., and can of course also take on other values.

[0082] Setting the length of the first shortest wall surface connection line L7 to greater than or equal to 13 mm contributes to improving the sound insulation effect of the second housing 11 between the second sound inlet opening 1101 and the sound outlet opening 1102 and further reduces the probability that the sound transmitted outwards from the sound outlet opening 1102 interferes with the sound detected by the second microphone 12.

[0083] Optionally, the ratio of the length of the first shortest wall surface connecting line L7 to the length of the first shortest straight line segment L6 is between 0.5 and 0.75. For example, it can be 0.55, 0.65, 0.7, etc., and can of course also take on other values.

[0084] By adjusting the ratio of the length of the first shortest wall surface connecting line L7 to the length of the first shortest straight line segment L6 to between 0.5 and 0.75, the sound insulation effect of the second housing 11 between the second sound inlet opening 1101 and the sound outlet opening 1102 is further improved. This contributes to improving the sound recording quality of the headphones 1.

[0085] Optional, as in the Fig. 5 and Fig. As shown in Figure 6, the ear hook 200 has a plane of symmetry A1 which is provided in the longitudinal direction F1 of the ear hook 200, wherein the plane of symmetry A1 passes through the sound inlet end 101 of the second sound inlet opening 1101 and the first sound outlet end 102, wherein in the worn state the sound inlet end 101 of the second sound inlet opening 1101 is located on a side of the second housing 11 facing away from the helix E17 and is closer to the ear hook 200 than the first sound outlet end 102.

[0086] By arranging the sound inlet end 101 of the second sound inlet opening 1101 and the first sound outlet end 102 so that they intersect the plane of symmetry A1, the appearance of the headphone 1 becomes more symmetrical and, on the other hand, the headphone 1 can be used simultaneously for wearing and using on the left ear and the right ear, which contributes to the realization of the function of switching between the left and right ear and effectively improves the adaptability of the headphone 1.

[0087] Furthermore, the sound inlet end 101 of the second sound inlet opening 1101 is designed such that, when worn, it is located on the side of the second housing 11 facing away from the helix E17, allowing the second sound inlet opening 1101 to effectively capture the voice emitted by the user's mouth, thereby significantly improving the usability of the headphones 1. When worn, the sound inlet end 101 of the second sound inlet opening 1101 is located closer to the ear hook 200 than the first sound outlet end 102, in order to avoid interference with the sound-generating assembly 13. This allows the sound-generating assembly 13 to occupy a relatively large space, thus improving the space utilization within the second housing 11.In the worn state, the first sound exit end 102 of the sound exit opening 1102 can be closer to the ear opening than the sound entry end 101 of the second sound entry opening 1101, so that the sound transmitted outwards from the sound generating arrangement 13 via the first sound exit end 102 more easily enters the ear opening of the user.

[0088] Optional, as in Fig. As shown in Figure 9, the second sound inlet opening 1101 has an axis direction pointing towards the outside of the second housing 11, this axis direction being referred to as the second axis direction F4. The sound outlet opening 1102 has a second sound outlet end 103 located on an inner wall surface of the second housing 11. That is, the sound emitted by the sound generating arrangement 13 is transmitted sequentially via the second sound outlet end 103 and the first sound outlet end 102 to the outside of the headphones 1. A second shortest straight line segment L8 exists between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the second sound outlet end 103.An endpoint of the first shortest straight line segment L6 at the opening edge of the first sound outlet 102 serves as the first reference point K1, while an endpoint of the second shortest straight line segment L8 at the opening edge of the second sound outlet 103 serves as the second reference point K2. The sound outlet 102 has a reference direction F7 pointing from the second reference point K2 to the first reference point K1. An angle 12 between the orthogonal projection of the second axis direction F4 onto the plane of symmetry A1 and the orthogonal projection of the reference direction F7 onto the plane of symmetry A1 is greater than or equal to 70 degrees. For example, it can be 70 degrees, 75 degrees, 80 degrees, 90 degrees, etc., and can, of course, take on other values ​​as well.

[0089] By setting the angle J2 between the orthogonal projection of the second axis direction F4 onto the plane of symmetry A1 and the orthogonal projection of the reference direction F7 onto the plane of symmetry A1 to greater than or equal to 70 degrees, the second sound inlet 1101 and the sound outlet 1102 are oriented differently. This effectively reduces the probability that the sound transmitted from the sound outlet 1102 is introduced into the second sound inlet 1101, the probability that the sound emitted by the sound-generating arrangement 13 interferes with the sound detected by the second microphone 12, and the probability that echoes occur when the user makes a call using the headphones 1, thus improving the user's call experience.

[0090] Optional, as in Fig. As shown in Figure 3, the first sound exit end 102 is designed in a strip shape, wherein on the plane of symmetry A1 the opening edge of the first sound exit end 102 has a first endpoint K6 and a second endpoint K7, which are spaced apart from each other in the longitudinal direction of the first sound exit end 102, wherein the first endpoint K6 is closer to the sound entry end 101 of the second sound entry opening 1101 than the second endpoint K7.

[0091] By having the first sound outlet end 102 shaped like a strip, the area of ​​the sound outlet opening 1102 is ensured. Simultaneously, a funnel structure is formed between the sound outlet opening 1102 and the concha E12 because, when the user wears the headphones 1, the second housing 11 is not in a complete fit with the concha E12 of the user's ear EAR. Instead, there is a space that gradually increases from the contact area between the second housing 11 and the ear EAR towards the ear canal opening, i.e., a wedge-shaped space is created. By using the concha E12 as a reflective surface, a reflection amplification of the sound waves can be generated.The sound emitted from the sound outlet 1102 is reflected and thus amplified in the cavum conchae E12, thereby increasing the sound pressure at the ear canal opening by means of reflection effects, so that the user can hear a stronger sound, effectively improving the user experience.

[0092] Optional, as in the Fig. 5 and Fig. As shown in Figure 9, the first sound exit end 102 and the sound entry end 101 of the second sound entry opening 1101 are each arranged symmetrically with respect to the plane of symmetry A1, wherein the first shortest straight line segment L6 connects the first endpoint K6 with a point on the opening edge of the sound entry end 101 of the second sound entry opening 1101 that is closest to the first endpoint K6, wherein the headphone 1 further has a third shortest straight line segment L9 that connects the first endpoint K6 with the second endpoint K7. An angle J3 between the first shortest straight line segment L6 and the third shortest straight line segment L9 is less than or equal to 75 degrees, can be, for example, 60 degrees, 65 degrees, 70 degrees, 75 degrees, etc., and can, of course, also take on other values.

[0093] By setting the angle J3 between the first shortest straight line segment L6 and the third shortest straight line segment L9 to less than or equal to 75 degrees, the orientation of the sound outlet opening 1102 relative to the second sound inlet opening 1101 is further restricted. This effectively reduces the probability that the sound transmitted from the sound outlet opening 1102 will be introduced into the second sound inlet opening 1101, thus contributing to the improvement of the sound recording quality of the headphones 1.

[0094] Optionally, the length of the third shortest straight line segment L9 is greater than or equal to 7 mm. For example, it can be 7 mm, 10 mm, 13 mm, 15 mm, etc., and can of course also take on other values.

[0095] By adjusting the length of the third shortest straight line segment L9 to greater than or equal to 7 mm, the dimensions of the sound outlet opening 1102 better match the dimensions and shape of the cavum conchae E12 and the ear opening, thus facilitating the formation of a funnel structure for sound amplification. This effectively improves the sound emission quality of the headphone 1, effectively increases the sound pressure at the ear opening, and effectively enhances the listening volume.

[0096] Optional, as in Fig. As shown in Figure 9, the second sound inlet opening 1101 has an axis direction pointing towards the outside of the second housing 11, this axis direction being referred to as the second axis direction F4. An angle J4 between the second axis direction F4 and the first shortest straight line segment L6 is greater than or equal to 40 degrees. For example, it can be 40 degrees, 45 degrees, 50 degrees, 55 degrees, etc., and can, of course, take on other values ​​as well.

[0097] By setting the angle J4 between the second axis direction F4 and the first shortest straight line segment L6 to greater than or equal to 40 degrees, the orientation of the second sound inlet opening 1101 relative to the sound outlet opening 1102 is further restricted. This effectively reduces the probability that the sound transmitted from the sound outlet opening 1102 is introduced into the second sound inlet opening 1101, thus contributing to the improvement of the sound recording quality of the headphones 1.

[0098] Optionally, as in Fig. Figure 9 shows that the outer wall surface of the second housing 11 has a third reference point K3 on the plane of symmetry A1, which is closest to the attachment part 300, wherein the inner contour of the ear hook 200 has a fourth reference point K4 in an area which, in the worn state, is located near the edge of the helix, and which is furthest from the third reference point K3, wherein a fifth reference point K5, which is furthest from the fourth reference point K4, is further provided on the outer wall surface of the second housing 11, wherein the first sound exit end 102 and the sound entry end 101 of the second sound entry opening 1101 are located on both sides of the fifth reference point K5.

[0099] In its natural state, the outer surface of the sound-generating part 100 and the outer surface of the system part 300 do not abut each other. Positions with the shortest distance exist between the outer surface of the sound-generating part 100 and the outer surface of the system part 300, with one endpoint of the connecting line between these positions, located on the outer surface of the second housing 11, being the third reference point K3. If, in its natural state, the outer surface of the sound-generating part 100 and the outer surface of the system part 300 do abut each other, the length of the shortest connecting line between them is approximately zero.In this case, the third reference point K3 is the midpoint of an arc, which is accordingly formed by a system area in which the outer wall surface of the sound-generating part 100 and the outer wall surface of the system part 300 are adjacent to each other.

[0100] In the worn state, the plane of symmetry A1 is almost parallel to the horizontal plane of the human body. Within the plane of symmetry A1, the ear hook 200, the sound-generating part 100, and the attachment part 300 each have an inner contour, on which at least the fourth reference point K4 is located. The fourth reference point K4 is a reference point on the inner contour that is furthest from the third reference point K3. In the worn state, the fourth reference point K4 is a reference point that lies on the inner contour of the ear hook 200 and corresponds to an edge of the helix E17 (e.g., the uppermost / outermost edge of the helix E17). The fourth reference point K4 can also be an inflection point of the inner contour.For example, the inner contour is a contour line that is entirely turned away from and protrudes from helix E17, with a portion of the inner contour located near the edge of helix E17 having a radius of curvature that, starting from the fourth reference point K4 and extending towards sound-generating part 100 and the system part 300 respectively, first gradually increases, then gradually decreases, and then gradually increases again. The fifth reference point K5 is a point on sound-generating part 100 that is furthest from the fourth reference point K4.

[0101] By positioning the first sound outlet end 102 and the sound inlet end 101 of the second sound inlet opening 1101 on either side of the fifth reference point K5, the outwardly curved second housing 11 between the first sound outlet end 102 and the sound inlet end 101 of the second sound inlet opening 1101 can isolate the sound transmitted from the first sound outlet end 102. This effectively reduces the probability of the sound transmitted from the first sound outlet end 102 being introduced into the second sound inlet opening 1101, thus contributing to the improvement of the sound recording quality of the headphones 1.

[0102] Optionally, as in Fig. Figure 9 shows a fourth shortest straight line segment L10 between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the fifth reference point K5, wherein the ratio of the length of the fourth shortest straight line segment L10 to the length of the first shortest straight line segment L6 is between 0.71 and 0.96, for example 0.75, 0.80, 0.85, 0.90, 0.95 etc. and can of course also take on other values.

[0103] By adjusting the ratio of the length of the fourth shortest straight line segment L10 to the length of the first shortest straight line segment L6 to between 0.71 and 0.96, the position of the sound inlet end 101 of the second sound inlet opening 1101 relative to the fifth reference point K5 is appropriately adjusted, which reduces the probability that the sound transmitted from the sound outlet opening 1102 is introduced into the second sound inlet opening 1101 and contributes to improving the sound recording quality of the headphones 1.

[0104] In some embodiments, as in Fig. 14 and Fig. Figure 15 shows the sound-generating part 100 as comprising a housing, a microphone, and a sound-generating arrangement 13 arranged within the housing, wherein the housing can be the second housing 11 described above, and wherein the microphone can be the second microphone 12 described above. The sound-generating arrangement 13 has at least one diaphragm 131, wherein the sound-generating arrangement 13 interacts with the second housing 11 to form a first acoustic chamber 1301 and a second acoustic chamber 1302 located on both sides of the diaphragm 131. The second housing 11 is provided with a sound inlet opening, a sound outlet opening 1102, and a pressure relief opening 1103, wherein the sound inlet opening can be the second sound inlet opening 1101 described above.The second microphone 12 detects external sound via the second sound inlet 1101, the sound being transmitted in the first acoustic chamber 1301 via the sound outlet 1102 to the user's ear canal, and the sound in the second acoustic chamber 1302 being transmitted via the pressure relief vent 1103 to the outside of the second housing 11. Specifically, the first acoustic chamber 1301 is where the diaphragm 131 vibrates to move air and generate sound waves that the user can hear, while the second acoustic chamber 1302 communicates with the pressure relief vent 1103 and thus with the outside environment to equalize the air pressure inside the second housing 11.The second sound inlet opening 1101 and the pressure relief opening 1103 are each arranged adjacent to the ear hook 200, the sound outlet opening 1102 being arranged such that it is further away from the ear hook 200 than the second sound inlet opening 1101 and the pressure relief opening 1103, the second sound inlet opening 1101 having a sound inlet end 101 located on the outer wall surface of the second housing 11, the pressure relief opening 1103 having a sound outlet end 104 located on the outer wall surface of the second housing 11, and the shortest straight line segment being the fifth shortest straight line segment being located between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the sound outlet end 104 of the pressure relief opening 1103. It is designated L12.The length of the fifth shortest straight line segment L12 is less than or equal to 4 mm, and can, for example, be 1 mm, 2 mm, 3 mm, 3.5 mm, etc., and can, of course, also take on other values. Furthermore, the ear hook 200 is configured to block sound transmission from the pressure relief opening 1103 to the second sound inlet opening 1101.

[0105] By arranging the second sound inlet 1101 and the pressure relief vent 1103 adjacent to the ear hook 200, positioning the sound outlet 1102 relatively far from the ear hook 200, and setting the length of the fifth shortest straight line segment L12 to less than or equal to 4 mm, the sound outlet 1102 is located at a greater distance from both the second sound inlet 1101 and the pressure relief vent 1103. This effectively reduces the probability that the sound transmitted outwards from the sound outlet 1102 will interfere with the second sound inlet 1101 and the pressure relief vent 1103.Furthermore, the ear hook 200 can provide some isolation between the second sound inlet opening 1101 and the pressure relief opening 1103, thereby effectively reducing the interference between the pressure relief opening 1103 and the second sound inlet opening 1101, effectively improving the operational reliability of the headphones 1 and increasing the sound recording quality of the headphones 1.

[0106] Optional, as in Fig. As shown in Figure 16, the ear hook 200 forms a connection area 201 on the second housing 11, wherein the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103 are arranged on opposite sides of the connection area 201. Alternatively, as shown in Fig. As shown in Figure 6, the second housing 11 comprises a base body 111 and a connecting section 112, wherein the connecting section 112 connects the base body 111 to the ear hook 200, wherein the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103 are arranged on opposite sides of the connecting section 112.

[0107] By arranging the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103 on opposite sides of the connection area 201 and the connection section 112, respectively, the connection area 201 and the connection section 112 are used to isolate the second sound inlet opening 1101 from the pressure relief opening 1103. This effectively reduces the probability of mutual interference between the pressure relief opening 1103 and the second sound inlet opening 1101, the probability that sound transmitted from the pressure relief opening 1103 is introduced into the second sound inlet opening 1101, and the probability of phenomena such as sound loss and echoes occurring, thus contributing to an improvement in the sound recording quality of the headphones 1.

[0108] Optional, as in Fig. Figure 6 shows the second sound inlet opening 1101 in the worn state on one side of the connection area 201 or connection section 112 facing away from the helix, while the pressure relief opening 1103 is arranged on the other side of the connection position or connection section 112 facing the helix.

[0109] By arranging the second sound inlet opening 1101 on a side of the connection area 201 or the connection section 112 facing away from the helix, it is avoided that the second sound inlet opening 1101 is covered by the user's helix E17 when worn, thus preventing the sound transmission via the second sound inlet opening 1101 from being impaired, which contributes to improving the sound recording quality of the headphones 1.

[0110] Optional, as in Fig. As shown in Figure 6, the connecting section 112 is designed to taper away from the base body 111 in a direction that allows for a smooth connection between the ear hook 200 and an outer surface of the base body 111, thereby improving the aesthetics of the headphones 1. The second microphone 12 is located in the connecting section 112, and the second sound inlet 1101 is located on the connecting section 112 to fully utilize the space of the connecting section 112, effectively increasing the space utilization of the headphones 1 and making the structure of the headphones 1 more compact.

[0111] Optional are, as in Fig. 5 shown, in the width direction F2 of the ear hook 200 the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103 are each arranged at least partially overlapping with the ear hook 200.

[0112] Specifically, the plane of symmetry A1 is perpendicular to the width direction F2 of the ear hook 200. Using a straight line perpendicular to the plane of symmetry A1 and parallel to the width direction F2 of the ear hook 200 as the reference line A3, the ear hook 200, when projected along the plane of symmetry A1 onto the reference line A3, has a first projection width S1; the sound inlet end 101 of the second sound inlet opening 1101, when projected along the plane of symmetry A1 onto the reference line A3, has a third projection width S3; and the sound outlet end 104 of the pressure relief opening 1103, when projected along the plane of symmetry A1 onto the reference line A3, has a fourth projection width S4, wherein the third projection width S3 and the fourth projection width S4 each overlap at least partially with the first projection width. S1 overlap,so that the ear hook 200 can form a barrier between the sound inlet end 101 of the second sound inlet opening 1101 and the sound inlet end 104 of the pressure relief opening 1103, thereby effectively reducing the probability that the sound transmitted from the pressure relief opening 1103 is introduced into the second sound inlet opening 1101, which contributes to improving the sound reception quality of the headphones 1.

[0113] Optionally, the maximum dimension of the overlapping part of the sound inlet end 101 of the second sound inlet opening 1101 with the ear hook 200 in the width direction F2 of the ear hook 200 is equal to the maximum dimension of the sound inlet end 101 of the second sound inlet opening 1101 in the width direction F2. As in Fig. As shown in Figure 5, the maximum dimension of the sound inlet end 101 of the second sound inlet opening 1101 in the width direction F2 is the dimension of the third projection width S3. The maximum dimension of the overlapping portion of the sound inlet end 101 of the second sound inlet opening 1101 with the ear hook 200 in the width direction F2 of the ear hook 200 is the dimension of the overlapping portion of the third projection width S3 with the first projection width S1. That is, in the width direction F2 of the ear hook 200, the sound inlet end 101 of the second sound inlet opening 1101 completely overlaps the ear hook 200. This means that the third projection width S3 is completely covered by the first projection width S1.

[0114] Optionally, the ratio of the maximum dimension of the overlapping part of the sound outlet end 104 of the pressure relief opening 1103 with the ear hook 200 in the width direction F2 of the ear hook 200 to the maximum dimension of the sound outlet end 104 of the pressure relief opening 1103 in the width direction F2 is greater than or equal to 90%. As in Fig. As shown in Figure 5, the maximum dimension of the sound outlet end 104 of the pressure relief opening 1103 in the width direction F2 is the dimension of the fourth projection width S4. The maximum dimension of the overlapping portion of the sound outlet end 104 of the pressure relief opening 1103 with the ear hook 200 in the width direction F2 of the ear hook 200 is the dimension of the overlapping portion of the fourth projection width S4 with the first projection width S1. That is, the ratio of the dimension of the overlapping portion of the fourth projection width S4 with the first projection width S1 to the dimension of the fourth projection width S4 is greater than or equal to 90%. For example, if the first projection width S1 is completely covered by the fourth projection width S4, the ratio of the first projection width S1 to the fourth projection width S4 is greater than or equal to 90%.

[0115] In this way, the ear hook 200 is enabled to form a better barrier between the sound entry end 101 of the second sound entry opening 1101 and the sound exit end 104 of the pressure relief opening 1103, which contributes to improving the sound recording quality of the headphones 1.

[0116] Optionally, as in the Fig. 5 and Fig. As shown in Figure 16, the ear hook 200 has a plane of symmetry A1, which is provided in the longitudinal direction F1 of the ear hook 200. The ear hook 200 comprises an elastic element 21 and an elastic coating 22 that surrounds the periphery of the elastic element 21. At an end of the elastic element 21 located near the sound-generating part 100, the ear hook 200 further has a reference plane that is tangential to the elastic element 21 and perpendicular to the plane of symmetry A1, this reference plane being referred to as the third reference plane A4. The sound inlet end 101 of the second sound inlet opening 1101 is located on one side of the third reference plane A4, and the sound outlet end 104 of the pressure relief opening 1103 is located on the other side of the third reference plane A4. The elastic element 21 can, for example, be a titanium plate.The elastic coating 22 can, for example, consist of materials such as silicone, rubber, elastic resin, polyurethane, polydimethylsiloxane, PVC or TPE to improve wearing comfort.

[0117] By arranging the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103 on both sides of the third reference plane A4, hard housings on both sides of an extension surface of the elastic element 21 are used to further seal off the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103. This improves the isolation effect between the sound inlet end 101 of the second sound inlet opening 1101 and the sound outlet end 104 of the pressure relief opening 1103, which contributes to improving the sound recording quality of the headphones 1.

[0118] Optional, as in Fig. As shown in Figure 16, the second sound inlet opening 1101, when worn, is located on one side of the third reference plane A4 furthest from the helix E17, while the pressure relief opening 1103 is located on the other side of the third reference plane A4, closer to the helix E17. This allows the second sound inlet opening 1101 to introduce external sound. The pressure relief opening 1103 has a different orientation than the second sound inlet opening 1101, and the hard housings on both sides of the extension surface of the elastic element 21 are used to isolate the two openings. This effectively reduces the probability of mutual interference between the second sound inlet opening 1101 and the pressure relief opening 1103, thus improving the sound reception quality of the headphones 1.

[0119] Optional, as in Fig. As shown in Figure 9, on the outer wall surface of the second housing 11 and the ear hook 200, between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the sound outlet end 104 of the pressure relief opening 1103, there exists a shortest wall surface connection line, which is referred to as the second shortest wall surface connection line L11. The second shortest wall surface connection line L11 is, in particular, a shortest arc segment formed along the contour line of the outer wall surface of the second housing 11 and the ear hook 200 between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the sound outlet end 104 of the pressure relief opening 1103.

[0120] The ratio of the arc length to the chord length of the second shortest wall surface connection line L11 is set to greater than or equal to 1.7. For example, it can be 1.7, 1.8, 1.9, 2.0, etc., and can, of course, also take on other values. By setting the ratio of the arc length to the chord length of the second shortest wall surface connection line L11 to greater than or equal to 1.7, the second housing 11 is convexly curved outwards between the opening edge of the sound inlet end 101 of the second sound inlet opening 1101 and the opening edge of the sound outlet end 104 of the pressure relief opening 1103.The curved second housing 11 can further isolate the second sound inlet opening 1101 from the pressure relief opening 1103 in order to effectively reduce the probability of mutual interference between the second sound inlet opening 1101 and the pressure relief opening 1103, which contributes to improving the sound recording quality of the headphones 1.

[0121] Optional, as in Fig.Figure 16 shows a partition plate 14 arranged in the sound-generating part 100, wherein the second microphone 12 is arranged on a side of the partition plate 14 facing the ear hook 200 and the sound-generating assembly 13 is arranged on a side of the partition plate 14 facing away from the ear hook 200. By arranging the partition plate 14 to separate the second microphone 12 from the sound-generating assembly 13, the interference of the second microphone 12 caused by the sound-generating assembly 13 is effectively reduced, which contributes to improving the sound recording quality of the headphones 1.

[0122] The foregoing presents only exemplary embodiments of the present application, which are not intended to limit the scope of protection of the present application. Any equivalent structure or equivalent process transformation carried out using the contents of the description and drawings of the present application, or any direct or indirect application of such contents to other related technical fields, also falls within the scope of protection of the present application.

Claims

[1] Headphones, characterized by, that the headphones comprise a sound-generating part, a mounting part and an ear hook, wherein the ear hook connects the sound-generating part to the mounting part, wherein in a worn state the sound-generating part and the mounting part assume a clamping position on two sides of the helix and the sound-generating part lies in a cavum conchae;wherein the ear hook has a plane of symmetry provided in a longitudinal direction of the ear hook, wherein the attachment part comprises a first housing and a first microphone arranged in the first housing, wherein the first microphone detects a first sound via a first sound inlet opening in the first housing, wherein the sound generating part comprises a second housing and a second microphone arranged in the second housing, wherein a second sound inlet opening and a sound outlet opening are provided in the second housing, wherein the second microphone detects a second sound via the second sound inlet opening in the second housing, and wherein the headphones further comprise a processing circuit that performs noise reduction based on the first sound and the second sound. [2] Headphones according to claim 1, characterized by, that the second sound inlet opening has a sound inlet end located on an outer wall surface of the second housing 11, wherein the minimum straight-line distance from an opening edge of the sound inlet end to an opening edge of the first sound inlet opening is greater than or equal to 20 mm. [3] Headphones according to claim 1, characterized by , that the second sound inlet opening has a sound inlet end located on an outer wall surface of the second housing 11, wherein the sound outlet opening has a first sound outlet end, and wherein between an opening edge of the sound inlet end and an opening edge of the first sound outlet end there exists a first shortest straight line segment greater than or equal to 9 mm. [4] Headphones according to claim 3, characterized by, that between the opening edge of the sound inlet end and the opening edge of the first sound outlet end there exists a first shortest wall surface connecting line which has the same endpoints as the first shortest straight line segment, wherein the first shortest wall surface connecting line is in particular a shortest arc segment which is formed along a contour line of the outer wall surface of the second enclosure between the opening edge of the sound inlet end and the opening edge of the first sound outlet end, wherein the first shortest wall surface connecting line is such that it projects outwards towards the outside of the second enclosure, and wherein the length of the first shortest wall surface connecting line is greater than or equal to 13 mm. [5] Headphones according to any one of claims 1 to 4, characterized by, that the sound inlet end of the second sound inlet opening is designed such that, in the worn state, it is located on one side of the second housing facing away from the helix, with the sound inlet end 101 of the second sound inlet opening 1101 being closer to the ear hook 200 than the first sound outlet end 102. [6] Headphones according to claim 5, characterized by, that the second sound inlet opening has a second axis direction pointing towards the outside of the second housing, wherein the sound outlet opening has a second sound outlet end located on an inner wall surface of the second housing, wherein sound emitted by a sound generating arrangement is transmitted via the second sound outlet end and then the first sound outlet end to the outside of the headphones, wherein a second shortest straight line segment exists between the opening edge of the sound inlet end of the second sound inlet opening and the opening edge of the second sound outlet end, wherein an endpoint of the first shortest straight line segment at the opening edge of the first sound outlet end is referred to as the first reference point K1 and an endpoint of the second shortest straight line segment at the opening edge of the second sound outlet end is referred to as the second reference point,wherein the sound outlet opening has a reference direction F7 pointing from the second reference point K2 to the first reference point K1, and wherein an angle between the orthogonal projection of the second axis direction onto the plane of symmetry and the orthogonal projection of the reference direction F7 onto the plane of symmetry is greater than or equal to 70 degrees. [7] Headphones according to any one of claims 1 to 6, characterized by, that between an outer wall surface of the sound-generating part and an outer wall surface of the system part there are positions with the shortest distance, wherein an endpoint of a connecting line between the positions with the shortest distance, which lies on the outer wall surface of the second housing, is designated as the third reference point K3, wherein a reference point in the inner contour which is furthest from the third reference point K3 is designated as the fourth reference point K4, wherein a point of the sound-generating part which is furthest from the fourth reference point K4 is designated as the fifth reference point K5, and wherein the first sound exit end and the sound entry end of the second sound entry opening are arranged on two sides of the fifth reference point K5. [8] Headphones according to any one of claims 1 to 7, characterized by, that a pressure relief opening is further provided in the second housing, wherein the second sound inlet opening and the pressure relief opening are each arranged adjacent to the ear hook 200, and wherein the sound outlet opening is arranged further away from the ear hook than the second sound inlet opening and the pressure relief opening. [9] Headphones according to any one of claims 1 to 8, characterized by , that the first housing comprises a main body and a transition section, wherein the transition section is arranged on an outer circumferential surface of the main body and is connected to the ear hook, wherein the transition section is designed to taper in a direction away from the main body in order to smoothly connect the ear hook to the outer surface of the main body; wherein the first microphone is arranged in the transition section, and wherein the first sound inlet opening is arranged on the transition section. [10] Headphones according to any one of claims 1 to 9, characterized by , that the processing circuit is further configured to detect wind noise based on the first sound and / or the second sound, and after detecting wind noise that is greater than or equal to a preset threshold, to switch the first microphone to an operating state and the second microphone to a non-operating state.

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