Acoustic unit, speaker module and in-ear earphone for in-ear earphone

Abstract

The utility model relates to an acoustic unit (1) for an in-ear earphone (31), the acoustic unit (1) includes treble sound channel (3) for treble sound wave and bass sound channel (4) for bass sound wave. The utility model further relates to a loudspeaker module and an in-ear earphone.

Description

Technical Field

[0001] This utility model relates to an acoustic unit for in-ear headphones, the acoustic unit having a high-frequency channel for high-frequency sound waves and a low-frequency channel for low-frequency sound waves. This utility model also relates to a speaker module and in-ear headphones. Background Technology

[0002] In-ear headphones are worn inside the ear canal. With the development of in-ear headphones, higher demands have been placed on sound quality, thus necessitating improvements to the acoustic units of in-ear headphones. Utility Model Content

[0003] The purpose of this invention is to overcome the known shortcomings of the prior art, especially to improve sound quality.

[0004] The above objectives are achieved by acoustic units, speaker modules, and / or in-ear headphones having the features of the independent claims. Advantageous or preferred embodiments are the subject of the corresponding dependent claims.

[0005] This invention provides an acoustic unit for in-ear headphones. The in-ear headphones are worn in the ear canal. The in-ear headphones can be used, for example, for listening to music or making calls.

[0006] The acoustic unit includes a tweeter channel for high-frequency sound waves. These high-frequency sound waves can be generated by a tweeter.

[0007] The acoustic unit also includes a bass channel for low-frequency sound waves, which can be generated by a subwoofer. By guiding high and low frequency signals or high and low frequency sound waves, precise acoustic separation can be achieved, reducing interference and improving sound reproduction. This allows for more accurate reproduction of music and speech content across a wide frequency spectrum.

[0008] Advantageously, the acoustic unit has a mixing channel. Tweeter and bass channels lead to this mixing channel. The mixing channel allows for the acoustic superposition of independently transmitted frequency components and ensures consistent sound radiation at the output of the acoustic unit. This improves phase characteristics and the localization of the sound source.

[0009] Advantageously, the acoustic unit includes a tweeter cavity. This forms a front cavity for the tweeter. Therefore, the tweeter cavity is a front cavity for the tweeter. The tweeter emits high-frequency sound waves into this tweeter cavity. The tweeter cavity, as the acoustic working volume of the tweeter, affects the tweeter's resonance characteristics. Targeted design of the tweeter cavity dimensions can improve the sound pressure level in the high-frequency range.

[0010] According to a preferred embodiment of the present invention, the acoustic unit has a bass speaker cavity. This forms a front cavity for the bass speaker. Therefore, the bass speaker cavity is a front cavity for the bass speaker. The bass speaker emits bass sound waves into the bass speaker cavity. The bass speaker cavity serves as the acoustic working volume of the bass speaker and enables deeper bass playback. Furthermore, the bass speaker cavity can be adjusted to be used in conjunction with a Helmholtz resonator to filter higher frequencies.

[0011] Furthermore, advantageously, the woofer cavity is arranged around the tweeter cavity. The woofer cavity and tweeter cavity are separate from each other. This concentric arrangement saves installation space in the in-ear headphone housing and does not affect the acoustic isolation between the two cavities. The separated structure prevents mutual interference between the resonant cavities.

[0012] According to a preferred embodiment of the present invention, the structure and / or dimensions of the tweeter channel and the tweeter cavity are designed to form a first Helmholtz resonator. The first Helmholtz resonator includes a tweeter channel and a tweeter cavity, the geometric parameters of which define a characteristic resonant frequency. In this way, the tweeter can specifically increase the sound pressure level in the range of approximately 10 kHz. Therefore, the first Helmholtz resonator is a tweeter Helmholtz resonator.

[0013] According to a preferred embodiment of the present invention, the structure and / or dimensions of the bass channel and the bass speaker cavity are designed to form a second Helmholtz resonator. The second Helmholtz resonator, or bass Helmholtz resonator, functions as an acoustic low-pass filter, significantly attenuating frequencies above its resonant frequency (e.g., about 5 kHz). This reduces crosstalk to higher frequency ranges and contributes to a balanced sound quality.

[0014] Advantageously, the tweeter and the woofer are arranged at least partially side-by-side. This allows for space-saving design of the acoustic units and enables a parallel arrangement within the headphone housing.

[0015] Furthermore, advantageously, the high-frequency channel and the low-frequency channel are at least partially isolated from each other. This acoustic and mechanical isolation prevents the sound waves in the two channels from interfering with each other.

[0016] Advantageously, the high-frequency channel and the low-frequency channel are arranged at least partially in parallel. This parallel arrangement helps to achieve symmetrical alignment and ensures uniform sound wave radiation.

[0017] Advantageously, the tweeter channel is at least partially straight. A straight channel minimizes acoustic losses caused by reflections and / or diffraction.

[0018] As a supplement or alternative, the bass channel is at least partially straight. This can improve the acoustic efficiency of bass transmission and minimize acoustic losses caused by reflections and / or diffraction.

[0019] According to a preferred embodiment of the present invention, the cross-sectional area of ​​the mixing channel is greater than the sum of the cross-sectional areas of the tweeter and woofer channels. A larger mixing channel area prevents backflow and sound pressure level increases in the convergence zone.

[0020] Furthermore, advantageously, the cross-sectional area of ​​the bass channel is larger than that of the treble channel.

[0021] Advantageously, the length of the high-frequency channel is greater than that of the low-frequency channel.

[0022] Advantageously, an acoustic damping element is provided between the bass channel and the bass speaker cavity. This acoustic damping element suppresses resonance and improves the efficiency of the low-pass filter.

[0023] Advantageously, the acoustic damping element is located between the bass channel and the bass speaker cavity and has an acoustic impedance of 160 MKS Rayles. This value achieves optimal acoustic impedance to provide effective damping without affecting bass playback.

[0024] Furthermore, advantageously, the cross-section of the tweeter cavity and / or the woofer cavity is circular. A circular cross-section minimizes reflections and / or diffraction, and achieves uniform sound propagation.

[0025] As a supplement or alternative, the woofer cavity is advantageously circular in cross-section. A circular cross-section minimizes reflections and / or diffraction, and achieves uniform sound propagation.

[0026] Advantageously, the length (especially the average length) of the high-frequency channel is 3.5 mm.

[0027] Advantageously, the diameter (particularly the average diameter) of the high-frequency channel is 1.5 mm.

[0028] Furthermore, advantageously, the high-frequency channel has a circular cross-section. A circular cross-section reduces airflow loss and also reduces reflection and / or diffraction.

[0029] Advantageously, the volume of the tweeter cavity is 5.56 mm³.

[0030] According to a preferred embodiment of the present invention, the diameter of the tweeter cavity is 2 mm.

[0031] Advantageously, the diameter (particularly the average diameter) of the bass channel is 1.1 mm.

[0032] Furthermore, advantageously, the cross-sectional area of ​​the bass channel is 4 mm².

[0033] Advantageously, the volume of the woofer cavity is 47.8 mm³.

[0034] Advantageously, the length of the mixing channel is 8 mm. The length of the mixing channel is greater than 3 mm.

[0035] The values ​​or dimensions for the tweeter channel, woofer channel, tweeter cavity, woofer cavity, and mix channel described above achieve optimal acoustic characteristics for the acoustic unit. In this case, the listed values ​​may have a tolerance range of + / -10% without causing a significant deterioration in acoustic characteristics.

[0036] According to a preferred embodiment of the present invention, the bass channel has a curved and / or elliptical cross-section. As a supplement or alternative, the bass channel is arranged around the tweeter channel at least in a portion of its area. This allows for a compact layout of the acoustic components while maintaining functionality.

[0037] Furthermore, advantageously, the acoustic unit includes a housing. The tweeter channel, the woofer channel, the mix channel, at least a portion of the tweeter cavity, and / or at least a portion of the woofer cavity are disposed within the housing. Preferably, the tweeter channel and the woofer channel can be at least partially isolated from each other by the housing or a portion of the housing.

[0038] Advantageously, the high-frequency channel includes a first inlet, and the low-frequency channel includes a second inlet. The first inlet extends beyond the second inlet. This staggered arrangement of the inlets allows for optimization of the transducer unit's acoustic path and improves frequency range isolation at the input.

[0039] Advantageously, the first inlet of the high-frequency channel and the second inlet of the low-frequency channel are arranged at an angle to each other.

[0040] Advantageously, the first inlet and the second inlet are arranged adjacent to each other. This allows for a compact layout of the acoustic units and a compact design of the transducer units.

[0041] Furthermore, advantageously, the high-frequency channel includes a first outlet, and the low-frequency channel includes a second outlet. Separate outlets facilitate the accurate outward radiation of sound at different frequency bands and facilitate the directional guidance of sound to the mixing channel and ear canal.

[0042] Advantageously, the tweeter cavity has a third inlet, and the woofer cavity has a fourth inlet. The corresponding inlets form acoustic interfaces with the transducer units and influence the acoustic quality of the respective resonators.

[0043] Advantageously, the acoustic unit includes a pressure balancing channel with an opening for balancing. The pressure balancing channel is used to eliminate pressure differences with the environment. The pressure balancing channel can be isolated from the external environment by an air damping element. The air damping element is breathable but inhibits airflow. The air damping element can be a fabric that allows pressure balancing but significantly inhibits airflow.

[0044] Furthermore, advantageously, the acoustic unit has a recess. A balance channel opening communicates with this recess. An air damping element is arranged in and / or can be arranged in this recess. The recess serves as a mechanical support for the element and facilitates its reinstallation.

[0045] Advantageously, the acoustic unit has a coupling region. In the coupling region, the ear assembly can be coupled to or has been coupled to the acoustic unit. The coupling region is the connection portion between the acoustic unit and the earbud or ear assembly. The designed coupling region ensures sound quality and comfort. The ear assembly can be, for example, formed of silicone and is at least partially inserted into the ear canal.

[0046] Advantageously, the acoustic unit includes a receiving region, specifically a receiving base. The transducer unit can be housed or is already housed within this receiving region. The arrangement of the receiving region facilitates precise positioning and installation of the transducer unit and ensures optimal acoustic coupling.

[0047] This invention also proposes a loudspeaker module comprising a transducer unit and an acoustic unit. The acoustic unit is designed according to one or more of the features described above and / or below. This enables the complete integration of acoustic principles, including the defined Helmholtz resonator and channels, into a modular loudspeaker system.

[0048] Furthermore, advantageously, the transducer unit includes a tweeter and a woofer. The use of both transducer types enables crossover signal processing and improves sound quality across the entire audible frequency range. This helps optimize transmission performance and reduce harmonic distortion. The tweeter can employ, for example, a MEMS transducer, which is particularly well-suited for generating high-frequency sound waves. The woofer can employ, for example, an electrodynamic transducer, which is particularly well-suited for generating low-frequency sound waves.

[0049] Advantageously, the structure and / or dimensions of the first and / or second Helmholtz resonators are designed to function as acoustic low-pass filters. When a Helmholtz resonator functions as an acoustic low-pass filter, it allows sound waves below its resonant frequency to pass through almost unimpeded, while higher frequency sound waves are significantly attenuated. This allows for targeted limitation of the corresponding frequency range, improves acoustic separation between high and low frequencies, and contributes to enhanced sound clarity.

[0050] Advantageously, the woofers are arranged concentrically around the tweeters. This concentric arrangement saves space.

[0051] Advantageously, at least one acoustic seal is provided between the acoustic unit and the transducer unit. This seal ensures acoustic coupling between the transducer unit and the associated acoustic cavity. This prevents leakage and improves the efficiency of sound transmission.

[0052] Furthermore, advantageously, the at least one acoustic seal isolates and seals the tweeter cavity from the woofer cavity. This sealing structure ensures acoustic isolation between the two cavities and prevents the resonant cavities from interfering with each other. This contributes to the acoustic separation of the tweeter and woofer.

[0053] Advantageously, the transducer unit is disposed within the receiving region of the acoustic unit. The tweeter in the transducer unit can emit high-frequency sound waves from the receiving region to the tweeter cavity and / or the tweeter channel. Alternatively or complementaryly, the woofer in the transducer unit can emit low-frequency sound waves to the woofer cavity and / or the woofer channel. Directional coupling of the transducer unit to the tweeter channel and / or the woofer channel enables controlled excitation of the corresponding Helmholtz resonator. This improves the overall acoustic efficiency of the system.

[0054] This invention also proposes an in-ear headphone, comprising an acoustic unit and at least one transducer unit for generating and / or detecting sound waves. Preferably, the acoustic unit is designed according to one or more of the features described above and / or below, wherein the features may exist individually or in any combination.

[0055] Advantageously, the transducer unit includes a tweeter and a woofer. Using separate transducers for tweeters and woofers enables a wider bandwidth and better playback performance.

[0056] Furthermore, advantageously, the transducer unit is disposed within the accommodating area of ​​the acoustic unit. The tweeter in the transducer unit can emit sound waves into the tweeter cavity and / or the tweeter channel. Directing the sound emitted by the tweeter to a predetermined acoustic cavity allows for precise control of the tweeter resonator, thereby enhancing the brightness of the timbre.

[0057] As an alternative or supplement, advantageously, the woofer in the transducer unit can project sound waves to the woofer cavity and / or the bass channel. Controlled coupling between the woofer and the woofer cavity ensures effective bass enhancement and minimizes interference with the treble frequencies.

[0058] Advantageously, the in-ear headphones include an ear assembly. This ear assembly enables a defined mechanical and acoustic coupling between the acoustic unit and the ear canal. This improves acoustic seal, increases sound transmission efficiency, and enhances wearing comfort.

[0059] Furthermore, advantageously, the in-ear headphones are either wired or wireless. Wired or wireless headphones offer flexibility to adapt to different applications and user needs. Wireless headphones, in particular, can save space in the acoustic unit and optimize energy efficiency.

[0060] Furthermore, advantageously, the in-ear headphones (especially wireless headphones) include a rechargeable battery to enable wireless operation.

[0061] Furthermore, advantageously, the in-ear headphones include a radio interface (e.g., Bluetooth) to enable wireless operation. Attached Figure Description

[0062] Other advantages of this invention are described in the following embodiments. The accompanying drawings are shown below:

[0063] Figure 1 A cross-sectional view of the acoustic unit including the high-frequency and low-frequency channels;

[0064] Figure 2 This is a top-view perspective view of the acoustic unit;

[0065] Figure 3 This is a 3D view of the transducer unit;

[0066] Figure 4 A top-view perspective view of the acoustic unit including the transducer unit;

[0067] Figure 5 A perspective view of the acoustic unit and the transducer unit; and

[0068] Figure 6 This is a 3D diagram of an in-ear headphone. Detailed Implementation

[0069] In the accompanying drawings, some features may be labeled or numbered using terms such as "first," "second," and "third" to facilitate the differentiation and explanation of the features in the drawings. The numbering does not represent the order of the features, nor does it imply any hierarchical relationship.

[0070] Figure 1 This is a cross-sectional view of the acoustic unit 1, which includes the high-frequency channel 3 and the low-frequency channel 4.

[0071] Figure 1 Acoustic unit 1 is shown. Acoustic unit 1 is designed to guide sound waves in different frequency ranges and improve sound playback through acoustic isolation.

[0072] Figure 1 The acoustic unit 1 shown includes channel 2. Channel 2 includes a high-frequency channel 3, a low-frequency channel 4, and a mixing channel 5 as described below.

[0073] also, Figure 1 The illustrated embodiment also includes the aforementioned tweeter channel 3. The tweeter channel 3 is used to guide high-frequency sound waves. The tweeter channel 3 has a first inlet 9 through which high-frequency sound waves can enter the tweeter channel 3.

[0074] Acoustic unit 1 also includes a bass channel 4. The bass channel 4 guides bass sound waves, thereby achieving separate transmission of bass and treble sound waves. This achieves acoustic isolation between bass and treble frequencies. The bass channel 4 includes a second inlet 10, through which bass sound waves can enter the bass channel 4.

[0075] Figure 1 The embodiment also includes a mixing channel 5. Mixing channel 5 is the confluence area of ​​the treble channel 3 and the bass channel 4. The treble channel 3 and the bass channel 4 lead to the mixing channel 5. Furthermore, treble and bass sound waves converge in the mixing channel 5.

[0076] Sound waves transmitted in the two channels 3 and 4 can enter the mixing channel 5 through the first outlet 11 of the high-frequency channel 3 and the second outlet 12 of the low-frequency channel 4. The mixing channel 5 also includes a channel outlet 13 through which sound waves transmitted in the mixing channel 5 can exit the mixing channel 5.

[0077] like Figure 1 As shown in the embodiment, the acoustic unit 1 includes a tweeter cavity 6. The tweeter cavity 6 serves as the acoustic working volume for high frequencies and includes a third inlet 14 through which high-frequency sound waves can enter the tweeter cavity 6. The dimensions of the tweeter cavity 6 are designed to form a first Helmholtz resonator. The first Helmholtz resonator includes a tweeter channel 3 and the tweeter cavity 6. Therefore, the first Helmholtz resonator is a tweeter Helmholtz resonator.

[0078] Figure 1 The diagram also shows a woofer cavity 7. The woofer cavity 7 is arranged around the tweeter cavity 6 and connected to the bass channel 4 via a fourth inlet 15. This concentric arrangement saves installation space and facilitates acoustic isolation across different frequency ranges. Targeted dimensional design allows for the formation of a second Helmholtz resonator. The second Helmholtz resonator includes the bass channel 4 and the woofer cavity 7. Therefore, the second Helmholtz resonator is a bass Helmholtz resonator.

[0079] like Figure 1As shown, the acoustic unit 1 includes a housing 8. Channels 3 and 4, and cavities 6 and 7 are disposed within the housing 8. The housing 8 constitutes the load-bearing structure of the entire acoustic unit 1. Channels 3 and 4, and cavities 6 and 7 are partially or entirely arranged within the housing 8.

[0080] exist Figure 1 In one embodiment, a first inlet 9 corresponding to the high-frequency channel 3 is also provided. The first inlet 9 allows high-frequency sound waves from the transducer unit 23 to enter.

[0081] In addition, a second inlet 10 corresponding to the bass channel 4 is also shown in the figure. In the figure, the second inlet 10 is located below the first inlet 9 to allow separate coupling of the bass range and to allow bass sound waves from the transducer unit 23 to enter.

[0082] The high-frequency channel 3 also includes a first output port 11. The low-frequency channel 4 includes a second output port 12. Sound waves enter the mixing channel 5 through these two output ports 11 and 12.

[0083] Figure 1 Acoustic damping element 32 is also shown. Acoustic damping element 32 is disposed between the bass channel 4 and the bass speaker cavity 7. Acoustic damping element 32 is positioned here within the region where bass sound waves enter the second inlet 10 of the bass channel 4. Acoustic damping element 32 is used to specifically suppress resonance in the low-frequency range and / or assist the Helmholtz resonator as an acoustic low-pass filter. Acoustic damping element 32 is shown here with a dashed line.

[0084] according to Figure 1 It also has a third inlet 14. The third inlet 14 forms an acoustic connection with the tweeter cavity 6.

[0085] Figure 1 The fourth inlet 15 is also shown. Sound waves can enter the subwoofer cavity 7 from the fourth inlet 15.

[0086] also, Figure 1 The embodiment also shows a balance channel opening 17. The balance channel opening 17 corresponds to a pressure balance channel 16, which reduces the pressure difference between the interior of the acoustic unit 1 and the surrounding environment. The balance channel opening 17 can be closed by an air damping element. The air damping element is permeable but inhibits airflow. The air damping element can be made of, for example, a mesh or grille.

[0087] Figure 1 The image also shows a groove 18. An air damping element can be inserted into the groove 18. The groove 18 is used for mechanical fixation and precise positioning of the air damping element to ensure that pressure balance can be repeatedly achieved.

[0088] The illustrated embodiment also includes a coupling region 28. The coupling region 28 enables mechanical and acoustic coupling between the ear assembly 29 and the acoustic unit 1. This defined coupling ensures stable wear while achieving low-loss transmission of sound waves into the ear canal.

[0089] Features already described in at least the preceding figure will not be repeated for simplicity. Furthermore, some features may be described only in this figure or one or more subsequent figures. For simplicity, the same reference numerals may be used for the same features. For clarity and brevity, not all features may be shown or labeled in the following figures, but features appearing in the preceding figures may also appear in this figure or subsequent figures. Similarly, for clarity, some features may be shown or labeled only in this figure or subsequent figures. Even so, features shown only in subsequent figures may already be present in this figure or the preceding figures.

[0090] Figure 2 This is a top-view perspective view of acoustic unit 1, including tweeter channel 3, woofer channel 4, tweeter cavity 6, and woofer cavity 7.

[0091] Figure 2 This is a three-dimensional view of acoustic unit 1. The diagram shows the internal structure of channels 3 and 4, as well as cavities 6 and 7.

[0092] The diagram shows tweeter channel 3. Tweeter channel 3 is positioned in the center and is used to directionally guide high-frequency sound waves.

[0093] Figure 2 The diagram also shows a bass channel 4. Bass channel 4 is arranged side-by-side with tweeter channel 3 to guide bass waves independently. This spatial separation enables acoustic isolation between two frequency ranges. For example, the frequency of the bass wave can reach up to 5 kHz, while the frequency of the tweeter wave can be higher than 5 kHz. However, in this case, the frequencies of the bass and tweeter waves may overlap.

[0094] also, Figure 2 The tweeter cavity 6 is also shown. The tweeter cavity 6 extends downwards to the tweeter channel 3. Therefore, high-frequency sound waves arrive at the tweeter cavity 6 first, and then at the tweeter channel 3. As shown, the tweeter cavity 6 and / or the tweeter channel 3 are cylindrical. However, the tweeter cavity 6 and the tweeter channel 3 are not coaxially arranged. Figure 1 As shown, there is an angle between the tweeter cavity 6 and the tweeter channel 3.

[0095] This embodiment also shows a woofer cavity 7. The woofer cavity 7 is arranged in a ring around the tweeter cavity 6. The concentric arrangement of the woofer cavity 7 and the tweeter cavity 6 achieves compact integration while ensuring that each cavity is formed independently.

[0096] As can also be seen from the figure, the cross-section of the woofer cavity 7 is much larger than the cross-section of the woofer channel 4. The woofer cavity 7 is arranged in a ring around the tweeter cavity 6, with the woofer channel 4 only located in a section next to the tweeter channel 3.

[0097] exist Figure 2 In the embodiment, an isolation element 19 is also shown. The isolation element 19 has an annular beam structure for separating the woofer cavity 7 from the tweeter cavity 6. This isolation design prevents mutual interference between the two resonant cavities, thereby improving the acoustic efficiency of the two resonators. A seal 26 may be provided on the top of the isolation element 19, which seals the woofer cavity 7 from the tweeter cavity 6. However, as shown in FIG. 4, the seal 26 only functions as a seal when the transducer unit 23 is inserted into the acoustic unit 1. In this case, at least one seal 26 is provided between the acoustic unit 1 (located on the isolation element 19 as described above) and the transducer unit 23.

[0098] Figure 2 Also shown is a receiving region 20. The receiving region 20 is a recess for accommodating and / or positioning the transducer unit 23. Its precise molding ensures accurate positioning of the transducer unit 23. As shown, the receiving region 20 can be a receiving base.

[0099] like Figure 2 As shown in the embodiment, the acoustic unit 1 includes a receiving groove 21. The receiving groove 21 is disposed within the receiving region 20 for mechanically fixing the transducer unit 23. The transducer unit 23 can be disposed in the receiving groove 21 in a form-fitting manner, thereby accurately guiding sound waves into the tweeter channel 3, the woofer channel 4, the tweeter cavity 6, and / or the woofer cavity 7.

[0100] also, Figure 2 The accommodating space 22 is shown. The accommodating space 22 includes a accommodating recess 21 for accommodating the transducer unit 23. The stepped geometry of the accommodating recess 21 and the accommodating space 22 ensures stable and correctly positioned installation.

[0101] Figure 2 The pressure balancing channel 16 is also shown. The pressure balancing channel 16 is used to communicate with the surrounding air and can reduce the pressure difference between the inside and the outside.

[0102] Figure 3 This is a top perspective view of transducer unit 23, including tweeter 24, woofer 25, transducer housing 27, and seal 26.

[0103] Figure 3The embodiment includes a transducer unit 23. The transducer unit 23 is used to generate sound waves in different frequency ranges, particularly high and low frequencies. The transducer unit is formed as an acoustic emission component of a speaker module 33 and / or an in-ear headphone 31.

[0104] like Figure 3 As shown in the embodiment, transducer unit 23 includes a tweeter 24. The tweeter 24 is preferably a MEMS transducer for generating high-frequency sound waves. Precise coupling with the tweeter cavity 6 and / or with the tweeter channel 3 enables directional excitation of the acoustic Helmholtz resonator.

[0105] Furthermore, transducer unit 23 includes a woofer 25. The woofer 25 can be specifically designed as an electric transducer to generate bass sound waves. Therefore, sound waves emitted toward the woofer cavity 7 and / or the bass channel 4 help to excite the Helmholtz resonator to produce resonance.

[0106] According to this embodiment, the woofer 25 is arranged concentrically around the tweeter 24.

[0107] Figure 3 The transducer unit 23 shown includes a transducer housing 27. The transducer housing 27 encloses the electrical and mechanical components of the tweeter 24 and the woofer 25. The transducer housing 27 ensures the mechanical stability of the transducer unit 23 and allows it to be precisely positioned within the receiving area 20 of the acoustic unit 1.

[0108] from Figure 3 As can be further seen, at least one seal 26 is provided. The seal 26 is an acoustic seal and can be arranged between the transducer unit 23 and the acoustic unit 1. The seal 26 ensures that the generated sound waves are coupled to the predetermined acoustic cavity in a low-loss manner. The seal 26 also isolates and seals the tweeter cavity 6 and the woofer cavity 7 from each other, thereby preventing the resonant cavities from interfering with each other. The seal 26 shown here surrounds the woofer 25, and therefore also surrounds the tweeter 24. Furthermore, another seal 26 (not shown here) can be provided, which can be disposed between the tweeter 24 and the woofer 25. Advantageously, this seal can also be annular and separate the tweeter 24 and the woofer 25. In this case, the seal 26 can be installed... Figure 2 The isolation element 19 shown.

[0109] Figure 4 A top perspective view of the acoustic unit 1 after the transducer unit 23 is inserted is shown, wherein the transducer unit 23 is housed in the accommodating space 22. This device is a component of the loudspeaker module 33.

[0110] Figure 4 The embodiment shown illustrates the acoustic unit 1 after the transducer unit 23 is inserted.

[0111] As shown in this embodiment, the transducer unit 23 is mounted in the accommodating space 22 or the accommodating recess 21. This ensures precise acoustic coupling with the corresponding channel and cavity.

[0112] Figure 5 A perspective view of the acoustic unit 1 is shown, including the integrated transducer unit 23, the channel 2, the coupling area 28, and the speaker module 33.

[0113] Figure 5 The illustrated embodiment includes an acoustic unit 1, which is part of the loudspeaker module 33. The loudspeaker module 33 is shown in a side view, in which a transducer unit 23 is inserted.

[0114] Figure 5 Coupling region 28 is also shown. Coupling region 28 is used for mechanical and acoustic connection of ear assembly 29 to acoustic unit 1 or speaker module 33. The designed coupling method ensures repeatable positioning of ear assembly 29 and guarantees low-loss transmission of sound waves from channel 2 to ear canal.

[0115] Figure 6 A perspective view of an in-ear headphone 31 is shown, including an acoustic unit 1, a transducer unit 23, an ear assembly 29, and a main sound outlet 30.

[0116] like Figure 6 As shown in the embodiment, the in-ear headphone 31 includes an ear assembly 29. The ear assembly 29 is disposed on the coupling region 28 of the acoustic unit 1 and is used for insertion into the ear canal. The ear assembly 29 establishes mechanical and acoustic coupling between the acoustic unit 1 or the in-ear headphone 31 and the user's ear canal.

[0117] Figure 6 The main sound outlet 30 is also shown. Located at the end of the ear assembly 29, the main sound outlet 30 is the final exit point for sound into the ear canal. The main sound outlet is acoustically connected to the sound channel 2 and contributes to the directional radiation of sound.

Claims

1. An acoustic unit (1) for an in-ear headphone (31), characterized in that, include: For high-frequency sound waves, the high-frequency channel (3); and The bass channel (4) is used for bass sound waves.

2. The acoustic unit (1) according to claim 1, characterized in that, The acoustic unit (1) includes a mixing channel (5), and the high-frequency channel (3) and the low-frequency channel (4) are connected to the mixing channel (5).

3. The acoustic unit (1) according to claim 2, characterized in that, The acoustic unit (1) includes a tweeter cavity (6), which forms the front cavity of the tweeter (24).

4. The acoustic unit (1) according to claim 3, characterized in that, The acoustic unit (1) includes a bass speaker cavity (7), which forms the front cavity of the bass speaker (25).

5. The acoustic unit (1) according to claim 4, characterized in that, The bass speaker cavity (7) is disposed around the tweeter cavity (6), wherein the bass speaker cavity (7) and the tweeter cavity (6) are separate from each other.

6. The acoustic unit (1) according to claim 4, characterized in that, The structure and / or dimensions of the tweeter channel (3) and the tweeter cavity (6) are designed to form a first Helmholtz resonator.

7. The acoustic unit (1) according to claim 6, characterized in that, The structure and / or dimensions of the bass channel (4) and the bass speaker cavity (7) are designed to form a second Helmholtz resonator.

8. The acoustic unit (1) according to claim 7, characterized in that, The structure and / or dimensions of the first Helmholtz resonator and / or the second Helmholtz resonator are designed to function as an acoustic low-pass filter.

9. The acoustic unit (1) according to claim 2, characterized in that, The cross-sectional area of ​​the mixing channel (5) is greater than the sum of the cross-sectional areas of the high-frequency channel (3) and the low-frequency channel (4).

10. The acoustic unit (1) according to claim 1, characterized in that, The cross-sectional area of ​​the bass channel (4) is greater than that of the treble channel (3).

11. The acoustic unit (1) according to claim 4, characterized in that, An acoustic damping element is provided between the bass channel (4) and the bass speaker cavity (7), and the acoustic damping element has an acoustic characteristic impedance of 160 MKS Rayls.

12. The acoustic unit (1) according to claim 4, characterized in that, The cross-section of the tweeter cavity (6) and / or the woofer cavity (7) is circular.

13. The acoustic unit (1) according to claim 3, characterized in that, The length of the tweeter channel (3) is 3.5 mm; and / or The diameter of the high-frequency channel (3) is 1.5 mm; and / or The cross-section of the high-frequency channel (3) is circular; and / or The volume of the tweeter cavity (6) is 5.56 mm³; and / or The diameter of the tweeter cavity (6) is 2 mm.

14. The acoustic unit (1) according to claim 4, characterized in that, The diameter of the bass channel (4) is 1.1 mm; and / or The cross-sectional area of ​​the bass channel (4) is 4 mm²; and / or The volume of the bass speaker cavity (7) is 47.8 mm³.

15. The acoustic unit (1) according to claim 2, characterized in that, The length of the mixing channel (5) is 8 mm, and the length of the mixing channel (5) is greater than 3 mm.

16. The acoustic unit (1) according to claim 1, characterized in that, The bass channel (4) has a curved and / or elliptical cross-section; and / or The bass channel (4) is arranged around the treble channel (3) in at least a portion of the area.

17. The acoustic unit (1) according to claim 4, characterized in that, The acoustic unit (1) includes a housing (8), in which the tweeter channel (3), the woofer channel (4), the mixing channel (5), at least a portion of the tweeter cavity (6) and / or at least a portion of the woofer cavity (7) are disposed.

18. The acoustic unit (1) according to claim 1, characterized in that, The acoustic unit (1) includes a receiving area (20), within which the transducer unit (23) can be or has been received.

19. A loudspeaker module, comprising Transducer unit (23); and Acoustic unit (1); Its features are, The acoustic unit (1) is designed according to any one of claims 1-18.

20. The speaker module (33) according to claim 19, characterized in that, The transducer unit (23) includes a tweeter (24) and a woofer (25).

21. The speaker module (33) according to claim 20, characterized in that, The woofer (25) is arranged concentrically around the tweeter (24).

22. The loudspeaker module (33) according to claim 20, characterized in that, The acoustic unit (1) includes a tweeter cavity (6) and a woofer cavity (7), and at least one acoustic seal is provided between the acoustic unit (1) and the transducer unit (23).

23. The speaker module (33) according to claim 22, characterized in that, The at least one acoustic seal isolates and seals the tweeter cavity (6) from the woofer cavity (7).

24. The speaker module (33) according to claim 22, characterized in that, The transducer unit (23) is housed within the accommodating region (20) of the acoustic unit (1); and The tweeter (24) of the transducer unit (23) can emit sound waves to the tweeter cavity (6) and / or the tweeter channel (3); and / or The subwoofer (25) of the transducer unit (23) can emit sound waves to the subwoofer cavity (7) and / or the subwoofer channel (4).

25. An in-ear headphone (31), comprising: Acoustic unit (1); as well as At least one transducer unit (23) for generating and / or detecting sound waves. Its features are, The acoustic unit (1) is designed according to any one of claims 1-18.

26. The in-ear headphone (31) according to claim 25, characterized in that, The in-ear headphones (31) include an ear assembly (29), and / or the in-ear headphones (31) are wired or wireless headphones.

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