Acoustic device

Abstract

One or more embodiments of the present specification relate to an acoustic device comprising: a speaker housing containing at least one magnetic element therein; a magnetic field sensor configured to read a spatial magnetic field; wherein when the relative positions of the magnetic element and the magnetic field sensor are changed to cause the change of the space magnetic field, the output state of the acoustic device is changed.

Description

Technical Field

[0001] The present specification relates to the field of acoustic technology, and in particular to an acoustic device. Background Art

[0002] In the current market, wearing detection sensors are widely used in products such as headphones. A typical application is to automatically wake up the system when it recognizes that the user is wearing headphones, and automatically enter standby mode when it recognizes that the user has taken off the headphones, thereby reducing power consumption and extending usage time. At the same time, it saves users' operating steps and greatly improves the user experience.

[0003] At present, the mainstream wear detection sensors are based on infrared sensors, capacitive contact sensors and other solutions. The former has a complex structure and system, and the latter has low stability. Both have the problem of low recognition accuracy. Especially in bone conduction headphones, due to its unique back-hanging wearing method, traditional wear detection solutions cannot achieve ideal detection results.

[0004] Therefore, it is necessary to develop a new type of acoustic device and wearing detection solution to accurately identify whether the bone conduction headphones are worn or not. Summary of the invention

[0005] One of the embodiments of this specification provides an acoustic device. The acoustic device includes: a speaker housing, wherein the speaker housing contains at least one magnetic element; a magnetic field sensor, configured to read a spatial magnetic field; wherein, when the relative position of the magnetic element and the magnetic field sensor changes, causing the spatial magnetic field to change, the output state of the acoustic device changes. By setting a magnetic field sensor in the acoustic device, the magnetic field sensor reads the spatial magnetic field, and the output state of the acoustic device is controlled according to the change of the spatial magnetic field read by the magnetic field sensor, the power consumption of the acoustic device can be reduced, the use time of the acoustic device can be extended, and the interactive experience can be improved.

[0006] In some embodiments, the magnetic field sensor includes at least two magnetic field sensitive components. The magnetic field sensor includes two or more magnetic field sensitive components, which can improve the anti-interference capability of the external environment magnetic field such as the earth's magnetic field.

[0007] In some embodiments, the at least two magnetic field sensitive components are arranged in parallel. By arranging the two magnetic field sensitive components in parallel, the two magnetic field sensitive components can have similar responses to spatial magnetic field changes in the same direction, which helps to more effectively eliminate external magnetic field interference when performing differential processing.

[0008] In some embodiments, the acoustic device is provided with a mainboard compartment, in which a circuit mainboard and / or a battery mainboard are accommodated, and the at least two magnetic field sensitive components are arranged on the circuit mainboard and / or the battery mainboard and are located on the half mainboard near the speaker housing. Placing the two magnetic field sensitive components directly on the circuit mainboard and / or the battery mainboard on the half mainboard near the speaker housing can reduce the length of the wiring required, and reduce the complexity and failure rate of the acoustic device.

[0009] In some embodiments, the distance between the at least two magnetic field sensors is in the range of 0.1 mm to 20 mm. By setting the distance between the two magnetic field sensors to be within a suitable range, the external magnetic field such as the earth's magnetic field can be approximately regarded as a uniform magnetic field between the two magnetic field sensors, so as to facilitate differential processing of the spatial magnetic field read by the two magnetic field sensors.

[0010] In some embodiments, the acoustic device is provided with a magnetic interface, and the minimum distance between the magnetic interface and the at least two magnetic field sensitive components is greater than or equal to 5 mm. By providing the magnetic interface, the acoustic device can be charged conveniently and quickly, and further by reasonably setting the distance between the magnetic interface and the magnetic field sensitive component, while ensuring that the acoustic device is charged conveniently and quickly, the influence of the spatial magnetic field generated by the magnetic interface on the magnetic field strength read by the magnetic field sensor can be reduced, thereby improving the sensitivity of the magnetic field sensor in identifying the position of the magnetic element.

[0011] In some embodiments, the acoustic device further comprises a proximity sensor, the acoustic device is provided with a mainboard compartment, and the proximity sensor is arranged on a side of the speaker housing and / or the mainboard compartment close to the human body. By arranging the proximity sensor on a side of the speaker housing and / or the mainboard compartment close to the human body, the proximity sensor can detect the approach of human skin to improve the accuracy of detection.

[0012] In some embodiments, the acoustic device includes an ear hook, the speaker housing and the magnetic field sensor are connected through the ear hook, and the speaker housing and the magnetic field sensor are clamped on both sides of the auricle through the ear hook. By clamping the speaker housing and the magnetic field sensor on both sides of the auricle with the ear hook, the wearing stability of the acoustic device can be ensured.

[0013] In some embodiments, the ear hook includes a first ear hook and a second ear hook, the speaker housing includes a first speaker housing and a second speaker housing, and the acoustic device further includes a back hook; wherein the first ear hook is connected to the first speaker housing, the second ear hook is connected to the second speaker housing, and the back hook is connected to the first ear hook and the second ear hook. The ear hook and the back hook are used to fix the acoustic device to the head / ear, so that the wearing stability of the acoustic device can be improved.

[0014] In some embodiments, the acoustic device includes a control circuit, and the control circuit is configured to control the output state of the acoustic device according to the change of the spatial magnetic field. Controlling the output state of the acoustic device according to the change of the spatial magnetic field can reduce the power consumption of the acoustic device, extend the use time of the acoustic device, and enhance the interactive experience.

[0015] In some embodiments, the magnetic field sensor reads the magnetic field strength of the spatial magnetic field in a specific direction, and the control circuit controls the output state of the acoustic device according to the magnetic field strength. The position of the magnetic element relative to the magnetic field sensor changes, and the change in the component magnetic field strength of the spatial magnetic field in a specific direction is relatively large. Controlling the output state of the acoustic device according to the change in the magnetic field strength in the specific direction can further improve the accuracy of the output state of the acoustic device.

[0016] In some embodiments, the control circuit determines the threshold interval of the magnetic field strength, and controls the output state of the acoustic device according to the threshold interval of the magnetic field strength, the threshold interval includes a first threshold interval and a second threshold interval, when the magnetic field strength is in the first threshold interval, the acoustic device is in the first output state; when the magnetic field strength is in the second threshold interval, the acoustic device is in the second output state. By determining the threshold interval of the magnetic field strength to control the output state of the acoustic device, the power consumption of the acoustic device can be reduced and the use time can be extended.

[0017] In some embodiments, the magnetic field sensor includes at least two magnetic field sensors, the control circuit performs differential processing on the spatial magnetic field read by the at least two magnetic field sensors, and controls the output state of the acoustic device according to the differential result. By performing differential processing on the spatial magnetic field read by the at least two magnetic field sensors, the accuracy of the output state of the acoustic device can be improved.

[0018] In some embodiments, the acoustic device further includes a proximity sensor, and the control circuit controls the output state of the acoustic device according to the detection result of the proximity sensor and the spatial magnetic field read by the magnetic field sensor. By using a variety of sensor fusion solutions, the accuracy of the output state control of the acoustic device can be further improved, thereby reducing the energy consumption of the acoustic device and extending the use time; on the other hand, it can also reduce the user operation steps and improve the user experience.

[0019] One of the embodiments of this specification also provides a headset, including: the acoustic device described in any embodiment of this specification, the control circuit identifies the wearing state of the headset according to the output state of the acoustic device. The magnetic field sensor in the acoustic device is used to read the spatial magnetic field to control the output state of the acoustic device, and the wearing state of the headset is identified according to the output state of the acoustic device, so as to improve the accuracy of the wearing state result of the headset, thereby reducing the energy consumption of the headset, extending the use time, and improving the interactive experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0021] Figure 1 is a schematic diagram of an acoustic device according to some embodiments of the present specification;

[0022] Figure 2 is another schematic diagram of an acoustic device according to some embodiments of the present specification;

[0023] Figure 3 is a schematic diagram of an output state of an acoustic device shown in some embodiments of this specification being a second output state;

[0024] Figure 4 is another schematic diagram of an output state of an acoustic device in a second output state according to some embodiments of this specification;

[0025] Figure 5 is another schematic diagram of an acoustic device according to some embodiments of the present specification;

[0026] Figure 6 is another schematic diagram of an acoustic device according to some embodiments of the present specification;

[0027] Fig. 7A is a schematic diagram of a single magnetic field sensor according to some embodiments of this specification;

[0028] Figure 7B is a schematic diagram of a dual magnetic field sensor according to some embodiments of this specification;

[0029] Figure 8 is a schematic diagram of a magnetic interface according to some embodiments of this specification;

[0030] Fig. 9A is a schematic diagram of the positions of two magnetic field sensitive components according to some embodiments of this specification;

[0031] Fig. 9Bis a schematic diagram of verification results of two magnetic field sensitive components according to some embodiments of this specification;

[0032] Fig.10 is a schematic diagram of placing a proximity sensor in a mainboard compartment according to some embodiments of this specification;

[0033] Fig.11 This is a schematic diagram of placing a proximity sensor in a speaker compartment according to some embodiments of the present specification. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0035] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0036] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0037] Some embodiments of the present specification provide an acoustic device. The acoustic device includes a speaker housing and a magnetic field sensor, wherein the speaker housing contains at least one magnetic element, and the magnetic field sensor can read the spatial magnetic field. When the relative position of the magnetic element and the magnetic field sensor changes, resulting in a change in the spatial magnetic field, the output state of the acoustic device changes. The output state of the acoustic device refers to the functional state of the acoustic device. For example, the output state of the acoustic device may include but is not limited to playing audio, pausing audio, entering standby mode, turning on, turning off, etc.

[0038] In the embodiments of the present specification, a magnetic field sensor is provided in the acoustic device, and the magnetic field sensor reads the spatial magnetic field. The output state of the acoustic device is controlled according to the changes in the spatial magnetic field read by the magnetic field sensor, thereby reducing the power consumption of the acoustic device, extending the use time of the acoustic device, and improving the interactive experience.

[0039] Figure 1 is a schematic diagram of an acoustic device according to some embodiments of the present specification.

[0040] In some embodiments, Figure 1 As shown, the acoustic device 100 may include a speaker housing 110 and a magnetic field sensor 121. The speaker housing 110 includes at least one magnetic element, and the magnetic field sensor 121 is used to read a spatial magnetic field.

[0041] The speaker housing 110 may be a shell structure for accommodating and protecting magnetic elements. In some embodiments, the speaker housing 110 may be in the shape of a cuboid, a quasi-cuboid, a cylinder, an ellipsoid, or other regular and irregular three-dimensional structures, and the speaker housing 110 may be designed as an integrated or split type. In some embodiments, the material of the speaker housing 110 may be metal, plastic, ceramic, etc., so that the speaker housing 110 has good strength, wear resistance, and anti-interference performance, and effectively protects the internal electronic components (e.g., magnetic elements, the vibration assembly 111 described below).

[0042] In some embodiments, the speaker housing 110 can also be used to accommodate a vibration component 111. The vibration component 111 can be a speaker in the acoustic device 100 that converts electrical signals into sound. In some embodiments, the types of vibration components 111 can include dynamic, electromagnetic, capacitive, piezoelectric, etc. Specifically, the dynamic / moving iron vibration component 111 includes a coil and a permanent magnet that can be used as a magnetic source. When the current passes through the coil, it interacts with the magnetic field generated by the magnetic source, so that the diaphragm vibrates and emits sound; the electromagnetic vibration component 111 includes an electromagnetic element that can be used as a magnetic source. When the power is turned on, the coil generates a magnetic field, so that the electromagnetic element attracts or repels the diaphragm, thereby generating vibration and emitting sound; the capacitive vibration component 111 does not include a magnetic source, and uses two parallel electrode plates to drive the diaphragm. The diaphragm is usually made of insulating material and coated with conductive material on both sides. When a voltage is applied between the electrodes, the generated electric field force drives the diaphragm to vibrate and emit sound; the piezoelectric vibration component 111 does not include a magnetic source, and it uses piezoelectric ceramics or piezoelectric polymers as a diaphragm. When voltage is applied, the piezoelectric material changes shape, causing vibrations and producing sound.

[0043] The magnetic element can be used to cooperate with the magnetic field sensor 121 to identify the change in the relative position of the magnetic element and the magnetic field sensor 121. In some embodiments, the magnetic element may include a magnetic element used as a magnetic source for the vibration component 111. The magnetic source may refer to a magnetic element that can generate a spatial magnetic field and is located in the vibration component 111. In some embodiments, the magnetic source includes but is not limited to ordinary magnetic elements, electromagnetic elements, permanent magnets, etc. For example, if the vibration component 111 is a moving coil type, the magnetic element may be a permanent magnet; if the vibration component 111 is an electromagnetic type, the magnetic element may be an electromagnetic element. In some embodiments, the magnetic field generated by the magnetic element set as a magnetic source in the vibration component 111 can be detected by the magnetic field sensor 121, thereby realizing the judgment of the relative position of the magnetic element and the magnetic field sensor 121. In some embodiments, for the piezoelectric vibration component 111, since its own structure does not have a magnetic element, one or more permanent magnets separately set in the speaker housing 110 can be used as a magnetic source. As for the dynamic coil / moving iron type vibration component 111, since its own structure has a permanent magnet, the permanent magnet inside the dynamic coil / moving iron type vibration component 111 can be used as a magnetic source. It should be noted that the number of magnetic elements in the speaker housing 110 can be one or more. For example, when the vibration component 111 contains a magnetic source, the speaker housing 110 may not be provided with a magnetic element, or one or more magnetic elements may be provided in the speaker housing 110. For another example, when the vibration component 111 does not contain a magnetic source, the speaker housing 110 needs to be provided with at least one magnetic element.

[0044] The magnetic field sensor 121 can be used to read the spatial magnetic field. The spatial magnetic field can refer to the composite magnetic field formed by the magnetic elements on the components of the acoustic device 100 and the external magnetic field. For example, the spatial magnetic field can be the composite magnetic field formed by the first speaker 111-1, the second speaker 111-2, the magnetic interface 123 and the external geomagnetic field described below. For a description of the composite magnetic field, please refer to Figure 8and its related description. In some embodiments, the magnetic field sensor 121 can read the change in the magnetic field strength of the surrounding space magnetic field when the magnetic element and the magnetic field sensor 121 are in different relative positions. In some embodiments, the acoustic device 100 may also include a control circuit, and the control circuit can control the output state of the acoustic device 100 based on the change in the spatial magnetic field strength. Specifically, the magnetic element of the vibration component 111 (i.e., the speaker described below) or the magnetic element set separately can be used as a magnetic source in conjunction with the magnetic field sensor. The relative positions of the various parts of the acoustic device 100 (for example, the speaker housing 110 and the magnetic field sensor 121) change, resulting in a change in the distance and / or angle between the magnetic element in the vibration component 111 and the magnetic field sensor 121, and the magnetic field strength measured by the magnetic field sensor 121 will also change accordingly. The control circuit can control the output state of the acoustic device 100 according to the change in the spatial magnetic field detected by the magnetic field sensor 121. In some embodiments, the distance and angle of the magnetic source of the acoustic device 100 relative to the magnetic field sensor 121 change, and the change will cause a change in the spatial magnetic field, thereby changing the total magnetic field strength or component magnetic field strength at the magnetic field sensor 121. The control circuit can monitor the change of the magnetic field strength at the magnetic field sensor 121, and control the output state of the acoustic device 100 according to the preset magnetic field strength threshold range. The description of controlling the output state of the acoustic device 100 according to the threshold range of the magnetic field strength can be found below and will not be repeated here.

[0045] In some embodiments, the acoustic device 100 may further include an ear hook 130. The ear hook 130 is a component that connects the speaker housing 110 and the magnetic field sensor 121, and is used to fix the acoustic device 100 on the user's ear. In some embodiments, the ear hook 130 may be an arc-shaped structure that matches the connection between the human auricle and the head T. When the user wears the acoustic device 100, the ear hook needs to be hung at the connection between the auricle and the head T to keep the acoustic device fixed on the ear. At this time, the speaker housing 110 and the magnetic field sensor 121 of the acoustic device 100 are respectively located on the front and back sides of the auricle to generate a clamping force on the user's ear to maintain the wearing stability of the acoustic device 100. In some embodiments, the ear hook 130 may be made of a flexible, lightweight, and wear-resistant material, such as silicone, soft plastic, titanium alloy, or stainless steel.

[0046] In some embodiments, the speaker housing 110 and the magnetic field sensor 121 can be directly connected through the ear hook 130. For example, the magnetic field sensor 121 can be coated with a flexible material (e.g., silica gel, etc.), and the coated magnetic field sensor 121 is directly connected to the speaker housing 110 through the ear hook 130. In some embodiments, the speaker housing 110 and the magnetic field sensor 121 can be indirectly connected through the ear hook 130. For example, the acoustic device 100 can also include a functional part housing 120, and the magnetic field sensor 121 is arranged in the functional part housing 120, and the magnetic field sensor 121 is connected to the speaker housing 110 through the functional part housing 120 and the ear hook 130. In some embodiments, the functional part housing 120 can also be used to accommodate other components of the acoustic device 100, such as a battery, a circuit board, etc. In some embodiments, the functional part housing 120 can be cylindrical, rectangular or other custom shapes to meet the requirements of the internal component layout. The material of the functional part housing 120 can be selected from ABS plastic, metal alloy or other suitable materials to ensure lightness, durability and comfortable wearing.

[0047] In some embodiments, the magnetic field sensor 121 can be placed in the mainboard compartment or battery compartment of the acoustic device 100 (the mainboard compartment or battery compartment can refer to the compartment body formed by the functional component housing 120). For example, the magnetic field sensor 121 is placed in the mainboard compartment, directly mounted on the mainboard surface and close to the vibration component 111, or mounted on a separate PCB or FPC board, and then connected to the mainboard through a lead, thereby accessing the acoustic device control chip. In other embodiments, the magnetic field sensor 121 can also be placed on the ear hook 130 or the rear hook 140 described below.

[0048] In some embodiments of the present specification, by placing the magnetic field sensor 121 in the main board compartment or battery compartment of the acoustic device 100, no additional leads are required, so that it is closer to the vibration component 111 and the acoustic device itself can remain relatively stable.

[0049] In some embodiments, the magnetic field sensor 121 may include a Hall sensor, an anisotropic magnetoresistive sensor (AMR sensor), a giant magnetoresistive sensor (GMR sensor), or a tunnel magnetoresistive sensor (TMR sensor).

[0050] In some embodiments of the present specification, by providing a magnetic field sensor 121 in the acoustic device 100 and reading the spatial magnetic field according to the magnetic field sensor 121 to control the output state of the acoustic device 100, the power consumption of the acoustic device 100 can be reduced and the use time of the acoustic device 100 can be extended.

[0051] In addition, the acoustic device 100 described in the embodiment of this specification can be applied to wearable devices such as headphones, hearing aids, glasses, etc. The control circuit can identify the wearing state of wearable devices such as headphones, hearing aids, glasses, etc. according to the output state of the acoustic device. Taking the application of the acoustic device 100 to headphones as an example, when the headphones are in a wearing state and a non-wearing state, the relative position between the magnetic element and the magnetic field sensor 121 will change. When the change in the relative position of the two causes a change in the spatial magnetic field, the output state of the acoustic device 100 changes, and the change in the output state can correspond to the change in the wearing state of the headphones. For example, when the headphones are in a non-wearing state, the output state of the acoustic device 100 can be a first output state, and the first output state can refer to a function-off state, such as power off, standby, and stop playing audio; when the headphones are in a wearing state, the output state of the acoustic device 100 can be a second output state, and the second output state can refer to a function-working state, such as power on and playing audio.

[0052] Figure 2 is another schematic diagram of an acoustic device according to some embodiments of the present specification.

[0053] like Figure 2 As shown, in some embodiments, the magnetic field sensor 121 reads the magnetic field strength of the spatial magnetic field in a specific direction, and the control circuit controls the output state of the acoustic device 100 according to the magnetic field strength read by the magnetic field sensor 121. The specific direction may include a thickness direction X, a major axis direction Y, and a minor axis direction Z. In some embodiments, the X, Y, and Z axes are three axes of a coordinate system established with the magnetic field sensor 121 itself as the origin, the thickness direction X is parallel to the thickness direction of the magnetic field sensor, and the major axis direction Y and the minor axis direction Z are orthogonal to each other. The major axis direction Y may be defined as the direction with the largest extension dimension in the shape of the magnetic field sensor 121 (for example, when the shape of the magnetic field sensor 121 is a rectangle or a rectangle, the major axis direction is the length direction of the rectangle or the rectangle), and the minor axis direction Z may be defined as the direction perpendicular to the major axis direction Y in the shape of the magnetic field sensor 121 (for example, when the shape of the magnetic field sensor 121 is a rectangle or a rectangle, the minor axis direction is the width direction of the rectangle or the rectangle). It should be noted that, in addition to the thickness direction X, the major axis direction Y and the minor axis direction Z, the specific directions mentioned above may also be any other vector directions in the above coordinate system.

[0054] In some embodiments, the magnetic element as a magnetic source in the vibration component 111 can generate a spatial magnetic field, and the position of the magnetic element relative to the magnetic field sensor 121 changes. For example, the acoustic device 100 is applied to headphones. When the headphones are switched between the natural state (i.e., the non-wearing state) and the wearing state, the position of the magnetic element relative to the magnetic field sensor 121 changes, and the position change causes a change in the spatial magnetic field. In some embodiments, the change in the spatial magnetic field can be a change in the total magnetic field strength, that is, a change in the vector sum of the magnetic field strengths in the thickness direction X, the long axis direction Y, and the short axis direction Z; the change in the spatial magnetic field can also be a change in the component magnetic field strength, that is, a change in the magnetic field strength in the thickness direction X, the long axis direction Y, and the short axis direction Z. In some embodiments, the relative distance between the magnetic element as a magnetic source in the vibration component 111 and the magnetic field sensor 121 is relatively fixed, and the distance between the two does not change much, so the change in the vector sum of the magnetic field strengths in the thickness direction X, the long axis direction Y, and the short axis direction Z is not large, and accordingly, the change in the total magnetic field strength is not large. The component magnetic field intensity of one axis (e.g., thickness direction X) is enhanced due to the angle deflection, and the component magnetic field intensity of another axis (e.g., long axis direction Y or short axis direction Z) is weakened accordingly. Therefore, the change of the component magnetic field intensity in the thickness direction X, long axis direction Y, and short axis direction Z is greater than the change of the total magnetic field intensity. Based on this, the output state of the acoustic device 100 can be controlled by reading the component magnetic field intensity in a specific direction through the magnetic field sensor 121.

[0055] In some embodiments of the present specification, the position of the magnetic element relative to the magnetic field sensor 121 changes, and the change in the component magnetic field strength of the spatial magnetic field in a specific direction is relatively large. The output state of the acoustic device 100 is controlled according to the change in the magnetic field strength in the specific direction, which can further improve the accuracy of the output state of the acoustic device 100.

[0056] The threshold interval may refer to the range of values ​​of the magnetic field strength of the magnetic field sensor in a specific direction (or the range of values ​​of the difference in magnetic field strength between two magnetic field sensors or two magnetic field sensitive parts in the same direction in the following text), which is used to determine the output state of the acoustic device 100 (for example, the first output state or the second output state). In some embodiments, the control circuit may determine the threshold interval in which the magnetic field strength is located, and control the output state of the acoustic device 100 according to the threshold interval in which the magnetic field strength is located. In some embodiments, the threshold interval may include a first threshold interval and a second threshold interval. When the magnetic field strength is in different threshold intervals, the output state of the acoustic device is different. For the description of the first threshold interval and the second threshold interval, please refer to the following and will not be repeated here.

[0057] In some embodiments, the threshold intervals where the magnetic field strength is located are different, and the output state of the acoustic device 100 is different. Different acoustic devices 100 have different threshold intervals, and the threshold interval can be determined according to the factory settings of the acoustic device 100. Specifically, when the acoustic device 100 leaves the factory, a universal threshold interval can be set, and each acoustic device 100 can be simply calibrated using an artificial head to determine the initial value of the factory, and the threshold interval is subsequently determined based on the initial value. For example, let the acoustic device 100 be in the first output state (or the acoustic device 100 is applied to the headset, and the headset is in a non-wearing state), at this time, the magnetic field sensor 121 is used to measure the magnetic field strength of the acoustic device 100 in a specific direction (for example, the X-axis, Y-axis, and Z-axis directions), and the magnetic field strength is used as the first initial value, and then the first initial value is used as the standard to expand a certain range and determine it as the first threshold interval, and the first threshold interval is used as the threshold interval corresponding to the magnetic field strength of the acoustic device 100 in the first output state (or the headset is in a non-wearing state). When the magnetic field strength is in the first threshold interval, the output state of the acoustic device 100 can be controlled to be the first output state (or the earphone is judged to be in a non-wearing state). Similarly, let the acoustic device 100 be in the second output state (or the acoustic device 100 is applied to the earphone, and the earphone is in a wearing state). At this time, the magnetic field sensor 121 is used to measure the magnetic field strength of the acoustic device 100 in a specific direction, and the magnetic field strength is used as the second initial value, and then the second threshold interval is determined according to the second initial value. The second threshold interval is the threshold interval corresponding to the magnetic field strength of the acoustic device 100 in the second output state (or the earphone is in a wearing state). When the magnetic field strength is in the second threshold interval, the output state of the acoustic device 100 can be controlled to be the second output state (or the earphone is judged to be in a non-wearing state). Among them, the specific direction in the first output state is consistent with the specific direction in the second output state.

[0058] In some embodiments, the factors affecting the threshold interval include, but are not limited to, the structure of the acoustic device 100, the type of acoustic device (bone conduction, air conduction, bone-air conduction), the position of the magnetic field sensor 121, the placement of the magnetic field sensor 121, etc. Among them, the structure of the acoustic device 100 can include a rear-mounted type, an open air conduction type (such as Figure 6 The position of the magnetic field sensor 121 may include being close to or far from the circuit main board, close to the end of the connection between the ear hook 130 and the functional part housing 120, etc. The placement of the magnetic field sensor 121 may include being horizontally placed, vertically placed, or tilted on the PCB, etc.

[0059] Just as an example, when the magnetic field sensor 121 is close to the circuit mainboard, the distance and angle between the magnetic element as a magnetic source in the vibration assembly 111 and the magnetic field sensor 121 change greatly when the output state of the acoustic device 100 is different (or the acoustic device 100 is applied to headphones, and the headphones are in the wearing and non-wearing state), resulting in significant changes in the component magnetic field strength in the thickness direction X and the long axis direction Y. For example, when the output state of the acoustic device 100 is the second output state (or the headphones are in the wearing state), the component magnetic field strength in the thickness direction X increases, while the component magnetic field strength in the long axis direction Y can decrease; and when the output state of the acoustic device 100 is the first output state (or the headphones are in the non-wearing state), the component magnetic field strength in the thickness direction X decreases, and the component magnetic field strength in the long axis direction Y increases; the component magnetic field strength in the short axis direction Z changes relatively little.

[0060] In some embodiments of the present specification, the output state of the acoustic device 100 is controlled by determining the threshold interval of the magnetic field strength, so that the power consumption of the acoustic device 100 can be reduced and the use time can be extended. For example, when the acoustic device 100 is not in use (such as the earphone is not worn), the output state of the acoustic device 100 can be controlled to be the first output state; when the acoustic device 100 is in use (such as the earphone is worn), the output state of the acoustic device 100 is controlled to be the second output state.

[0061] Figure 3 It is a schematic diagram showing that the output state of the acoustic device according to some embodiments of the present specification is a second output state.

[0062] In some embodiments, the threshold interval may include a first threshold interval and a second threshold interval. When the magnetic field strength is in the first threshold interval, the acoustic device 100 is in the first output state (when the acoustic device 100 is applied to the earphone, the corresponding earphone is in a non-wearing state); when the magnetic field strength is in the second threshold interval, the acoustic device 100 is in the second output state (when the acoustic device 100 is applied to the earphone, the corresponding earphone is in the first wearing state, i.e., the ear-hanging state). In some embodiments, there is a boundary between the first threshold interval and the second threshold interval to ensure that the output state of the acoustic device 100 (or the wearing state of the earphone) can be accurately controlled. For example, the magnetic field strength range corresponding to the first threshold interval is below the boundary, and the output state of the acoustic device 100 is the first output state (or represents that the earphone is in a non-wearing state); the magnetic field strength range corresponding to the second threshold interval is above the boundary, and the output state of the acoustic device 100 is the second output state (or represents that the earphone is in the first wearing state). In some embodiments, a buffer zone (also called a first buffer zone) can be set between the first threshold interval and the second threshold interval to cope with external magnetic field interference or errors of the magnetic field sensor 121. As an example only, the magnetic field strength of the boundary between the first threshold interval and the second threshold interval is W1. In order to cope with external magnetic field interference or errors in the magnetic field sensor 121, a magnetic field strength range with the boundary W1 as the midpoint can be set as a first buffer zone, for example [W1-A1, W1+A1]. When the magnetic field strength is in the magnetic field strength range of the first buffer zone [W1-A1, W1+A1], the control circuit controls the output state of the acoustic device 100 to be determined, rather than specifically controlling the output state of the acoustic device 100 to be the first output state or the second output state.

[0063] The first threshold interval refers to a value range of the magnetic field intensity in a specific direction, and the output state of the acoustic device 100 corresponding to the range is the first output state.

[0064] The second threshold interval refers to a range of magnetic field strength values ​​in a specific direction, and this range corresponds to the output state of the acoustic device 100 being the second output state. Figure 3 When the acoustic device 100 is in the second output state, it corresponds to the earphone being in the first wearing state. The first wearing state refers to the ear-hanging state in which the acoustic device 100 or the earphone is hung on the head and the acoustic device is normally worn on the ear.

[0065] In some embodiments of the present specification, the output state of the acoustic device 100 can be accurately controlled by different threshold intervals of the magnetic field strength.

[0066] Figure 4 This is another schematic diagram showing that the output state of the acoustic device is a second output state according to some embodiments of the present specification.

[0067] In some embodiments, the threshold interval may further include a third threshold interval. The third threshold interval refers to a range of magnetic field strength values ​​in a specific direction, which corresponds to the acoustic device 100 being in the second output state and corresponding to the second wearing state of the earphone when the acoustic device 100 is applied to the earphone. Figure 4 , the second wearing state refers to the neck-hanging state of hanging the acoustic device 100 or the earphone on the neck B. That is, when the acoustic device 100 is in the second output state, there can be two wearing states corresponding to the earphone, the first wearing state and the second wearing state. In some embodiments, there is a boundary between the third threshold interval and the second threshold interval to ensure that the two wearing states of the earphone can be accurately distinguished. For example, the magnetic field intensity range corresponding to the second threshold interval is below the boundary, representing the first wearing state; the magnetic field intensity range corresponding to the third threshold interval is above the boundary, representing the second wearing state. In some embodiments, a buffer zone (also called a second buffer zone) can be set between the third threshold interval and the second threshold interval to cope with external magnetic field interference or errors in the magnetic field sensor 121. As an example only, the magnetic field strength of the boundary between the second threshold interval and the third threshold interval is W2. In order to cope with external magnetic field interference or errors in the magnetic field sensor 121, a magnetic field strength range with the boundary W2 as the midpoint can be set as a second buffer zone, for example [W2-A2, W2+A2]. When the magnetic field strength is in the magnetic field strength range of the second buffer zone [W2-A2, W2+A2], the control circuit judges the wearing state of the earphone as pending, rather than the exact first wearing state or the second wearing state.

[0068] In some embodiments of the present specification, effective identification between the neck-hanging state and the ear-hanging state of the headset can be achieved by setting the third threshold interval.

[0069] In some embodiments, Figure 2 , Figure 3As shown, the acoustic device 100 may include a first speaker 111-1 and a second speaker 111-2. When the second speaker 111-2 contains a magnetic element, the distance between the second speaker 111-2 and the magnetic field sensor 121 will also affect the magnetic field distribution. When the magnetic field intensity detected by the magnetic field sensor 121 is in the first threshold interval, that is, when the acoustic device 100 is in the first output state, the first speaker 111-1 and the second speaker 111-2 are both close to the magnetic field sensor 121 (generally less than 5cm), and the magnetic induction intensity generated by the first speaker 111-1 and the second speaker 111-2 at the magnetic field sensor 121 is B01 and B02 respectively. When external interference magnetic fields such as the geomagnetic field are ignored, the total magnetic field intensity B0 is obtained by vector superposition of B01 and B02, wherein the total magnetic field intensity B0 can be decomposed into three orthogonal component magnetic field intensities B0x, B0y, and B0z corresponding to the X, Y, and Z axis directions of the magnetic field sensor coordinate system. In some embodiments, when the magnetic field strength detected by the magnetic field sensor 121 is in the second threshold interval, that is, the acoustic device 100 is in the second output state, the second speaker 111-2 is away from the magnetic field sensor 121 (the distance is usually greater than 14 cm), and the magnetic induction intensity generated by the first speaker 111-1 and the second speaker 111-2 at the magnetic field sensor 121 changes significantly. At this time, the total magnetic field strength obtained by superimposing the three orthogonal component magnetic field strength vectors in the X, Y, and Z axis directions is B1, and the axial components are B1x, B1y, and B1z, respectively. By measuring the total magnetic field strength or the axial direction component and setting a suitable threshold interval, the output state of the acoustic device 100 can be controlled.

[0070] refer to Figure 2 and Figure 3 In some embodiments, a first angle is formed between the ear hook 130 and the functional housing 120, and the value of the first angle corresponding to the first threshold interval is greater than the value of the first angle corresponding to the second threshold interval. The first angle corresponding to the first threshold interval may refer to the angle between the ear hook 130 and the functional housing 120 in the long axis direction ( Figure 2 Similarly, the first angle corresponding to the second threshold interval refers to the angle between the ear hook 130 and the long axis direction of the functional part housing 120 ( Figure 3 The angle between the dashed line and the Figure 2As shown, when the magnetic field strength detected by the magnetic field sensor 121 is in the first threshold interval, the spatial angle between the ear hook 130 and the functional component housing 120 can be set to α0; when the magnetic field strength detected by the magnetic field sensor 121 is in the second threshold interval, there is a certain clamping force between the first speaker 111-1 and the second speaker 111-2 and the temporal bone, so that the ear hook 130 is deflected to a certain extent, and the spatial angle between the ear hook 130 and the functional component housing 120 becomes α1, as shown in FIG. Figure 3 As shown. Therefore, the first angle corresponding to the first threshold interval is greater than the first angle corresponding to the second threshold interval. In some embodiments, the ear hook 130 (i.e., the portion of the ear hook 130 between the connection between the ear hook 130 and the functional part housing 120 and the connection between the ear hook 130 and the functional part housing 120) can be approximately regarded as a straight line, so that the angle between the ear hook 130 and the functional part housing 120 in the long axis direction is measured and determined as the first angle. In other embodiments, the angle between the magnetic element and the magnetic field sensor 121 can be used as another parameter affecting the magnetic field strength, and the angle between the magnetic element and the magnetic field sensor 121 will directly affect the magnetic field strength of each axial component in the magnetic field sensor coordinate system.

[0071] In some embodiments, the output state of the acoustic device 100 is the second output state, and the earphone is in the state as follows: Figure 4 In the second wearing state shown, that is, when it is hung on the neck B, the angle between the ear hook 130 and the functional part shell 120 can be α2. Due to the structural characteristics of the acoustic device 100 or the earphone itself, what contacts the neck B is the functional part shell 120 rather than the speaker (that is, the vibration component 111). Therefore, the positional relationship between the magnetic field sensor 121 and the speaker in the second wearing state is different from that in the first wearing state, that is, the angle α2≠α1. At the same time, because the distance between the second speaker 111-2 and the magnetic field sensor 121 is shortened, the magnetic field strength at the magnetic field sensor 121 in the first wearing state and the second wearing state is different, so that the second wearing state of the earphone can be identified.

[0072] It is understandable that some deformation may occur after the acoustic device 100 is used for a long time (due to the strain on the titanium wire in the ear hook 130), and this deformation may affect the first angle, but the change in the first angle caused by the deformation is not sufficient to cause the output state of the acoustic device 100 (or the recognition result of the wearing state of the earphone) to fail.

[0073] In some embodiments of the present specification, a change in the first angle between the ear hook 130 and the functional component housing 120 can cause a change in the magnetic field strength at the magnetic field sensor 121, and the wearing status can be identified by determining the threshold range of the magnetic field strength.

[0074] Figure 5is another schematic diagram of an acoustic device according to some embodiments of the present specification.

[0075] like Figure 5 As shown, in some embodiments, the ear hook 130 may include a first ear hook 130-1 and a second ear hook 130-2, the speaker housing 110 includes a first speaker housing 110-1 and a second speaker housing 110-2, the first ear hook 130-1 is connected to the first speaker housing 110-1, and the second ear hook 130-2 is connected to the second speaker housing 110-2. The acoustic device 100 also includes a rear hook 140, and the rear hook 140 connects the first ear hook 130-1 and the second ear hook 130-2. In some embodiments, the rear hook 140 can be an arc-shaped structure that fits closely to the human head T. The rear hook 140 can keep the acoustic device 100 stable on the user's head T and ensure that the ear hook 130 is kept in contact with the ear. In some embodiments, the rear hook 140 can be made of plastic, metal, or silicone. In some embodiments, when the user wears the rear-hanging acoustic device 100, the rear hanger 140 needs to be placed behind the head T so that it surrounds the head T and the first ear hanger 130-1 and the second ear hanger 130-2 are closely attached to the connection between the auricle and the head T. In some embodiments, the functional component housing 120 may include a first functional component housing 120-1 and a second functional component housing 120-2, the first speaker housing 110-1 and the first functional component housing 120-1 are connected via the first ear hanger 130-1, and the second speaker housing 110-2 and the second functional component housing 120-2 are connected via the second ear hanger 130-2.

[0076] In some embodiments, the wearing state of the back-hook acoustic device can be determined by the component magnetic field strength.

[0077] Figure 6 is another schematic diagram of an acoustic device according to some embodiments of the present specification.

[0078] In some embodiments, the speaker housing 110 and the magnetic field sensor 121 (or the functional component housing 120) are clamped on both sides of the auricle by the ear hook 130 to keep the acoustic device 100 worn. Figure 6 As shown, in some embodiments, the ear hook 130 can be an arc-shaped structure adapted to the auricle. Figure 6When the acoustic device 100 is shown, the ear hook 130 is directly placed close to the connection between the auricle and the head T, and the speaker housing 110 and the magnetic field sensor 121 (or the functional component housing 120) are clamped on both sides of the auricle by the ear hook 130 to maintain the wearing stability of the acoustic device 100. In other embodiments, when the speaker housing 110 and the magnetic field sensor 121 (or the functional component housing 120) are clamped on both sides of the auricle by the ear hook 130, the ear hook 130 can also be an ear clip structure, and the speaker housing 110 and the magnetic field sensor 121 are arranged at both ends of the ear clip, and the ear clip is directly clamped on both sides of the auricle.

[0079] In some embodiments of this specification, Figure 6 The speaker and the mainboard of the acoustic device shown in FIG. 1 can be in one housing (eg, speaker housing 110), and the battery compartment can be in another housing (eg, functional component housing 120). Figure 6 As shown, the magnetic field sensor 121 is placed in the battery compartment. When the acoustic device 100 is worn, the ear hook 130 undergoes a certain deformation, which causes the relative position (such as the angle) between the speaker and the magnetic field sensor 121 to change. By measuring the magnetic field change by the magnetic field sensor, the output state of the acoustic device can be controlled. In the embodiment of this specification, Figure 6 The change in the distance between the magnetic element and the magnetic field sensor 121 in the acoustic device shown is relatively large, and the change in magnetic field strength caused by the distance change can drown out the interference of the earth's magnetic field. Figure 6 The acoustic device shown can use the total magnetic field strength or the component magnetic field strength to control the output state of the acoustic device.

[0080] In some embodiments, the user Figure 6 When the acoustic device shown in is worn, the ear hook 130 connected to the speaker housing 110 and the magnetic field sensor 121 (or the functional component housing 120) on the acoustic device 100 needs to be stretched to a certain extent so that the speaker housing 110 and the magnetic field sensor (or the functional component housing 120) can be separated towards each other by a certain distance, and then the wearing stability of the acoustic device 100 is maintained by elastic clamping of the ear hook 130 on both sides of the auricle. In some embodiments, a change in the distance between the magnetic element and the magnetic field sensor 121 will cause a change in the total magnetic field strength, and the typical value of the geomagnetic field is about 40-50VT. The change in magnetic field strength caused by the change in the distance between the magnetic element and the magnetic field sensor 121 must be higher than the typical value of the geomagnetic field in order to drown out the interference of the geomagnetic field. Therefore, preferably, the change in the distance between the magnetic element and the magnetic field sensor 121 can be greater than 10mm. It is understandable that Figure 6The acoustic device 100 shown in the figure is relatively small in size. The user stretches the ear hook 130 to a certain extent, which is enough to significantly change the distance between the magnetic element in the speaker housing 110 and the magnetic field sensor 121. At this time, the total magnetic field strength at the magnetic field sensor 121 also changes significantly accordingly. Therefore, the output state of the acoustic device 100 can be controlled according to the change in the total magnetic field strength.

[0081] Fig. 7A is a schematic diagram of a single magnetic field sensor according to some embodiments of this specification.

[0082] like Fig. 7A As shown, in some embodiments, the acoustic device 100 can detect changes in the spatial magnetic field with a single magnetic field sensor 121, and a magnetic field sensitive component S1 is disposed in the magnetic field sensor 121. The magnetic field sensitive component S1 in the magnetic field sensor 121 needs to simultaneously measure the component magnetic field strength from the earth's magnetic field and the magnetic source in the vibration component 111 (for example, a permanent magnet in the speaker). The total magnetic field strength component measured by the magnetic field sensor 121 is the vector superposition of the component earth's magnetic field strength and the component magnetic source magnetic field strength. Specifically, as Fig. 7A As shown, the component magnetic field strengths measured by the magnetic field sensitive component S1 are Bx, By and Bz, where: Bx = Bex + Bsx, By = Bey + Bsy and Bz = Bez + Bsz. Wherein, Bex, Bey, Bez represent the three-axial component magnetic field strengths of the earth's magnetic field at the magnetic field sensitive component S1, respectively, and Bsx, Bsy, Bsz represent the three-axial component magnetic field strengths of the magnetic source in the vibration component 111 at the magnetic field sensitive component S1, respectively. It can be seen that the earth's magnetic field will interfere with the results of the magnetic field strength at a single magnetic field sensitive component S1 (i.e., Bx, By and Bz), resulting in the accuracy and stability of the wearing state detection of the acoustic device 100 being affected.

[0083] Figure 7B is a schematic diagram of a dual magnetic field sensor according to some embodiments of the present specification.

[0084] like Figure 7B As shown, in some embodiments, the acoustic device 100 can detect changes in the spatial magnetic field using two magnetic field sensors 121. The two magnetic field sensors 121 can be two independent magnetic field sensors, or one magnetic field sensor 121 can include two magnetic field sensitive components, such as Figure 7BAs shown in S1 and S2, the control circuit can perform differential processing on the spatial magnetic field read by the two magnetic field sensors S1 and S2, and determine the change of the spatial magnetic field according to the differential result, so as to control the output state of the acoustic device 100. Specifically, when the dual magnetic field sensor 121 is used, the component magnetic field strength measured at the magnetic field sensor S1 is Bx, By and Bz, and the component magnetic field strength measured at the magnetic field sensor S2 is Bx', By' and Bz'. ​​These two sets of component magnetic field strengths are vector superpositions of the component geomagnetic field strength and the component magnetic source magnetic field strength. Specifically, for the component magnetic field strength measured at S1: Bx = Bex + Bsx, By = Bey + Bsy and Bz = Bez + Bsz; for the component magnetic field strength measured at S2: Bx' = Bex' + Bsx', By' = Bey' + Bsy' and Bz' = Bez' + Bsz'. Wherein, Bex', Bey', Bez' respectively represent the three-axial component magnetic field strength of the earth's magnetic field at the magnetic field sensitive element S2, and Bsx', Bsy', Bsz' respectively represent the three-axial component magnetic field strength of the magnetic source in the vibration component 111 at the magnetic field sensitive element S2. In some embodiments, since the distance between the two magnetic field sensitive elements is very close, the earth's magnetic field between the two magnetic field sensitive elements can be approximately regarded as a uniform magnetic field, then Bex = Bex', Bey = Bey', Bez = Bez'. Wherein, Bex, Bey, Bez represent the three-axial component magnetic field intensity of the geomagnetic field at the magnetic field sensitive element S1 in the magnetic field sensor 121 respectively; Bex', Bey', Bez' represent the three-axial component magnetic field intensity of the geomagnetic field at the magnetic field sensitive element S2 in the magnetic field sensor 121 respectively; the two sets of component magnetic field intensity measured at the dual magnetic field sensitive element are subjected to differential processing, that is, the component magnetic field intensity Bx', By' and Bz' measured at S2 are respectively subtracted from the component magnetic field intensity Bx, By and Bz measured at S1, and it can be obtained: dBx=Bx'–Bx=Bex'+Bs x'-Bex-Bsx=Bsx'–Bsx、dBy=By'-By=Bey'+Bsy'-Bey-Bsy=Bsy'-Bsy、dBz=Bz'-Bz=Bez'+Bsz'-Bez-Bs=Bsz'-Bsz, where dBx, dBy, and dBz are the three axial component magnetic field intensity differences at the dual magnetic field sensitive part obtained by differential processing of the two sets of component magnetic field intensities at the dual magnetic field sensitive part, and dBx, dBy, and dBz can represent the differences in the magnetic field intensity of each axial component of the actual spatial magnetic field at the dual magnetic field sensitive part. From the above, it can be seen that the actual magnetic field intensity obtained by differential processing of the two sets of component magnetic field intensities measured at the dual magnetic field sensitive part is only related to the component magnetic field intensity of the magnetic source in the acoustic device 100 at the dual magnetic field sensitive part, and has nothing to do with the external magnetic field intensity such as the earth's magnetic field.

[0085] In some embodiments of the present specification, two or more magnetic field sensors 121 are used to form an array, or a single magnetic field sensor 121 includes two or more magnetic field sensitive elements, which can improve the anti-interference ability of the external environment magnetic field such as the earth's magnetic field.

[0086] In some embodiments, the sensitive axes of the two magnetic field sensitive components are parallel. The sensitive axis refers to the direction in which the magnetic field sensitive component is sensitive to magnetic field changes in space, including the thickness direction X, the major axis direction Y, and the minor axis direction Z of the magnetic field sensor 121. In some embodiments of the present specification, the sensitive axes of the two magnetic field sensitive components are set to be parallel, so that the two magnetic field sensitive components have similar responses to spatial magnetic field changes in the same direction, which helps to more effectively eliminate external magnetic field interference when performing differential processing. In other embodiments, the sensitive axes of the two magnetic field sensitive components can be set at a certain angle (for example, 45 degrees), so that the two magnetic field sensitive components can read the spatial magnetic field intensity in different directions, and the components of the spatial magnetic field in different directions (for example, X, Y, Z) are obtained by calculation, and then the control circuit performs differential processing on the spatial magnetic field read by the two magnetic field sensitive components, and controls the output state of the acoustic device according to the differential result. It is understandable that, unlike when the sensitive axes of the two magnetic field sensors are arranged in parallel, when the sensitive axes of the two magnetic field sensors are arranged at a certain angle, the differential processing algorithm needs to be adjusted to adapt to the angle difference between the sensitive axes, which can also eliminate the interference of external magnetic fields such as the geomagnetic field and achieve precise control of the output state of the acoustic device. In some embodiments of the present specification, by arranging the sensitive axes of the two magnetic field sensors at a certain angle, the two magnetic field sensors can be arranged more flexibly in the magnetic field sensor 121.

[0087] In some embodiments, at least two magnetic field sensors may be disposed on the circuit main board and / or the battery main board and located on the half main board close to the speaker housing 110. In other embodiments, the two magnetic field sensors may also be disposed on a flexible printed circuit board (FPC) and connected to the main board via wires.

[0088] In some embodiments of the present specification, placing two magnetic field sensitive components directly on the circuit main board and / or the battery main board on the half side of the main board close to the speaker housing 110 can reduce the required wiring length and reduce the complexity and failure rate of the acoustic device.

[0089] In some embodiments, at least two magnetic field sensitive components do not overlap with each other. For example, the distances between the two magnetic field sensitive components and the same magnetic element are different. The distance between the magnetic field sensitive component and the magnetic element may refer to the distance between the geometric center of the magnetic field sensitive component and the geometric center of the magnetic element. For another example, the relative position angles between the two magnetic field sensitive components and the magnetic element are different. The relative position angle can be represented by the angle between the line between the magnetic field sensitive component and the magnetic element (the line between the geometric center of the magnetic field sensitive component and the geometric center of the magnetic element) and a specific direction (for example, the thickness direction X, the major axis direction Y, and the minor axis direction Z of the magnetic field sensor 121). In some embodiments, the distance between the two magnetic field sensitive components is very close compared to the geomagnetic field, so the influence of external magnetic fields such as the geomagnetic field on the two magnetic field sensitive components is relatively small; and because the two magnetic field sensitive components do not overlap with each other, the magnetic field generated by the magnetic element will have a significant difference in magnetic field strength at the two magnetic field sensitive components. It can be understood that when the two magnetic field sensitive components do not overlap with each other, the magnetic field strength generated by the magnetic element detected by the two magnetic field sensitive components is different, and this difference can better distinguish the change in magnetic field strength generated by the magnetic element from external magnetic field interference such as the geomagnetic field. In some embodiments of the present specification, the two magnetic field sensors do not overlap with each other, so that the magnetic field generated by the magnetic element has different magnetic field strengths at the two magnetic field sensors, so as to facilitate differential processing of the spatial magnetic field read by the two magnetic field sensors, thereby improving the accuracy of the output state of the acoustic device 100.

[0090] In some embodiments, the two magnetic field sensitive elements do not overlap each other in the magnetic field sensor 121, which may result in different spatial angles formed between the sensitive axis directions of the two magnetic field sensitive elements and the vector directions of the magnetic field lines generated by the magnetic element and passing through the magnetic field sensor 121. These differences can enable the magnetic field sensor 121 to better distinguish between changes in magnetic field intensity at the magnetic field sensitive elements and external magnetic field interference such as the geomagnetic field.

[0091] In some embodiments, the distance between the two magnetic field sensitive components can range from 0.1 mm to 20 mm. In some embodiments, the distance between the two magnetic field sensitive components can range from 0.1 mm to 10 mm. In some embodiments, the distance between the two magnetic field sensitive components can range from 1 mm to 10 mm. Preferably, the distance between the two magnetic field sensitive components can be set to 1 mm to 5 mm. Within this distance range, the spatial variation of the external magnetic field such as the geomagnetic field is relatively small. Then, within the range between the two magnetic field sensitive components, the external magnetic field such as the geomagnetic field can be approximately regarded as a uniform magnetic field. It can be understood that in the process of differential processing of the spatial magnetic field read by the two magnetic field sensitive components, the difference between the magnetic field strengths measured by the two magnetic field sensitive components will affect the accuracy of the differential processing. Since the external magnetic field such as the geomagnetic field can be approximately regarded as a uniform magnetic field within this distance range, the influence of the external magnetic field such as the geomagnetic field on the two magnetic field sensitive components can be approximately regarded as the same. Therefore, when differential processing is performed on the spatial magnetic field read by the two magnetic field sensitive components, the influences from external magnetic fields such as the geomagnetic field will cancel each other out, thereby highlighting the magnetic field difference generated by the magnetic source of the acoustic device 100. At this time, the differential processing can eliminate the interference of the external magnetic field and improve the accuracy of the output state of the acoustic device 100.

[0092] In some embodiments of the present specification, by setting the distance between two magnetic field sensors within a suitable range, the external magnetic field such as the geomagnetic field can be approximately regarded as a uniform magnetic field between the two magnetic field sensors, so as to facilitate differential processing of the spatial magnetic field read by the two magnetic field sensors.

[0093] Figure 8 It is a schematic diagram of a magnetic interface shown in some embodiments of this specification.

[0094] like Figure 8As shown, in some embodiments, the acoustic device 100 is provided with a magnetic suction interface 123, which is arranged on the circuit main board 122 and on the half main board away from the speaker housing 110, and the minimum distance between the magnetic suction interface 123 and the magnetic field sensitive part (i.e., the magnetic field sensor 121) is greater than or equal to 5 mm. In some embodiments, the magnetic suction interface 123 can be a magnetic suction charging interface for charging the acoustic device 100. In the embodiments of this specification, some acoustic devices 100 can be designed to be provided with a magnetic suction charging interface, i.e., a magnetic suction interface 123, at the tail of the circuit main board 122 (the half main board of the circuit main board 122 away from the speaker housing 110), because the magnetic suction interface 123 contains at least one permanent magnet, which will also form a magnetic field in the surrounding space, so the spatial magnetic field actually measured by the magnetic field sensor 121 is a composite magnetic field composed of the first speaker 111-1, the second speaker 111-2, the magnetic suction interface 123, and the external geomagnetism. Among them, the position of the magnetic interface 123 relative to the magnetic field sensor 121 is fixed, so the magnetic field generated by the magnetic interface 123 at the magnetic field sensor 121 is a fixed magnetic field, which can be easily eliminated through algorithm calibration. In some embodiments, when the magnetic field intensity generated by the magnetic interface 123 at the magnetic field sensor 121 is too large, the sensitivity of the magnetic field sensor 121 to identify the speaker position will be reduced. Therefore, in order to reduce the impact of the magnetic interface and prevent the magnetic field sensor 121 from exceeding the range, the minimum distance between the magnetic interface 123 and the magnetic field sensor 121 can be set to be greater than or equal to 5mm. In some embodiments, in order to reduce the impact of the magnetic interface and prevent the magnetic field sensor 121 from exceeding the range, the minimum distance between the magnetic interface 123 and the magnetic field sensor 121 can be set to be greater than or equal to 8mm.

[0095] In some embodiments of the present specification, by setting up a magnetic suction interface 123, the acoustic device 100 can be charged conveniently and quickly. Furthermore, by reasonably setting the distance between the magnetic suction interface 123 and the magnetic field sensitive component, while ensuring that the acoustic device 100 can be charged conveniently and quickly, the influence of the spatial magnetic field generated by the magnetic suction interface 123 on the magnetic field strength read by the magnetic field sensor 121 can be reduced, thereby improving the sensitivity of the magnetic field sensor 121 to identify the position of the magnetic element.

[0096] Fig. 9A is a schematic diagram of the positions of two magnetic field sensitive components according to some embodiments of this specification; Fig. 9B It is a schematic diagram of verification results of two magnetic field sensitive components shown in some embodiments of this specification.

[0097] like Fig. 9AAs shown, in the acoustic device 100, the distance L1 between the two magnetic field sensors S1 and S2 is set to 2 mm, the sensitive axes of the two magnetic field sensors S1 and S2 are kept parallel to each other, and the two magnetic field sensors S1 and S2 are placed in the first functional component housing 120-1 of the acoustic device 100 and close to the speaker, that is, the speaker housing 110. By performing differential processing on the magnetic field strength of each axial component of the two magnetic field sensors S1 and S2 (see above Figure 7B And related content), the actual three-axial component magnetic field strength at the magnetic field sensor 121 can be obtained as dBx, dBy, dBz. Fig. 9B As shown, the x-axis represents the output state of the acoustic device 100 (the first output state or the second output state), the y-axis represents the magnitude of the actual three-axial component magnetic field strength dBx, dBy, and dBz at the magnetic field sensor 121, and the curve S is obtained by comprehensive calculation of the three-axial component magnetic field strength dBx, dBy, and dBz. For example, the value on the curve S can be the summed average of dBx, dBy, and dBz. It can be seen from the figure that the changes of the dBx, dBy, and dBz curves are synchronized or approximately synchronized with the changes of the curve S. When the curve S (or dBx, dBy, and dBz) is at a high level, the output state of the acoustic device 100 is the second output state (the corresponding earphone is in the wearing state), and when the curve S (or dBx, dBy, and dBz) is at a low level, the output state of the acoustic device 100 is the first output state (the corresponding earphone is not in the wearing state). It can be understood that dBx, dBy, and dBz can all change significantly and accurately reflect the change in the output state of the acoustic device 100 (or the wearing state of the earphone), and the judgment process is similar to that of curve S. In the present embodiment, during the test, walking, jumping, running, shaking, and other behaviors did not affect the judgment result of the magnetic field sensor 121, indicating that the solution of the output state of the acoustic device 100 by two magnetic field sensors 121 or one magnetic field sensor 121 encapsulated with two magnetic field sensitive components S1 and S2 has extremely high stability and repeatability, and has extremely strong anti-interference ability against external magnetic field interference such as the geomagnetic field.

[0098] In some embodiments, the magnetic field sensor 121 may read the total magnetic field strength of the spatial magnetic field, and control the output state of the acoustic device 100 according to the total magnetic field strength.

[0099] Fig.10 is a schematic diagram of placing a proximity sensor in a mainboard compartment according to some embodiments of this specification; Fig.11 This is a schematic diagram of placing a proximity sensor in a speaker compartment according to some embodiments of the present specification.

[0100] In some embodiments, the acoustic device 100 may also include a proximity sensor 124. Fig.10As shown, the proximity sensor 124 can be arranged on a side of the mainboard compartment (i.e., the compartment body formed by the functional component housing 120) close to the human body. Fig.11 As shown, the proximity sensor 124 is arranged in the speaker housing 110. In some embodiments, the proximity sensor 124 can be used to detect the approach of human skin. When the proximity sensor 124 is close to the human body, the value to be measured changes significantly. When the value to be measured reaches the preset threshold, the output state of the acoustic device 100 can be controlled to be the second output state. Taking the acoustic device 100 applied to headphones as an example, when the user wears headphones, the proximity sensor 124 is close to the human skin, and the value to be measured changes until it reaches the preset threshold. At this time, the output state of the acoustic device 100 can be controlled to be the second output state, and the corresponding headphones are in the wearing state. Among them, the value to be measured refers to the signal value measured by the proximity sensor 124 (for example, capacitance value, light intensity, etc.), which can be used to indicate the distance between the proximity sensor 124 and the human skin to help control the output state of the acoustic device 100 (or determine whether the headphones are in the wearing state); the preset threshold can be a preset parameter for controlling the output state of the acoustic device 100. In some embodiments, the preset threshold can be set according to the signal value measured by the proximity sensor 124. Specifically, when the acoustic device 100 is close to or in contact with the user's skin, the measured value of the proximity sensor 124 will change significantly. When the measured value exceeds or equals the preset threshold, it can be considered that the acoustic device 100 is already in the wearing state, and the control circuit controls the acoustic device 100 to be in the second output state; conversely, if the measured value is lower than the preset threshold, it can be considered that the acoustic device 100 is in the non-wearing state, and the control circuit controls the acoustic device 100 to be in the first output state. In some embodiments, the magnetic field sensor 121 and the proximity sensor 124 can be used in combination to control the output state of the acoustic device 100. For example, when the control circuit determines that the magnetic field sensor 121 detects that the magnetic field intensity of each axial component is within the threshold interval, and the measured value of the proximity sensor 124 reaches the preset threshold, the acoustic device 100 can be controlled to be in the second output state; otherwise, the control circuit controls the acoustic device 100 to be in the first output state. In some embodiments, the proximity sensor 124 may include but is not limited to a capacitive proximity sensor, a photoelectric proximity sensor, and the like.

[0101] In some embodiments of the present specification, the accuracy of output state control of the acoustic device 100 can be further improved by using a variety of sensor fusion solutions, thereby reducing the energy consumption of the acoustic device 100 and extending the use time; on the other hand, it can also reduce user operation steps and improve user experience.

[0102] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0103] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0104] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in this specification, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this specification. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing server or mobile device.

[0105] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0106] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0107] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this specification are hereby incorporated by reference in their entirety. Except for application history documents that are inconsistent with or conflicting with the contents of this specification, documents that limit the broadest scope of the claims of this specification (currently or later attached to this specification) are also excluded. It should be noted that if the descriptions, definitions, and / or use of terms in the materials attached to this specification are inconsistent or conflicting with the contents described in this specification, the descriptions, definitions, and / or use of terms in this specification shall prevail.

[0108] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. An acoustic device, comprising: A speaker housing, wherein at least one magnetic element is contained in the speaker housing; A magnetic field sensor is configured to read a spatial magnetic field; wherein, When the relative position of the magnetic element and the magnetic field sensor changes, causing the spatial magnetic field to change, the output state of the acoustic device changes.

2. The acoustic device according to claim 1, wherein: The magnetic field sensor includes at least two magnetic field sensitive components.

3. The acoustic device according to claim 2, wherein: The at least two magnetic field sensitive components are arranged in parallel.

4. The acoustic device according to claim 2, wherein: The acoustic device is provided with a mainboard compartment, in which a circuit mainboard and / or a battery mainboard is accommodated, and the at least two magnetic field sensitive components are arranged on the circuit mainboard and / or the battery mainboard and are located on the half mainboard close to the speaker housing.

5. The acoustic device according to claim 2, wherein: The distance between the at least two magnetic field sensitive components ranges from 0.1 mm to 20 mm.

6. The acoustic device according to claim 2, wherein: The acoustic device is provided with a magnetic interface, and the minimum distance between the magnetic interface and the at least two magnetic field sensitive components is greater than or equal to 5 mm.

7. The acoustic device according to claim 1, wherein: The acoustic device further includes a proximity sensor. The acoustic device is provided with a mainboard compartment. The proximity sensor is arranged on a side of the speaker housing and / or the mainboard compartment close to a human body.

8. The acoustic device according to claim 1, wherein: The acoustic device comprises an ear hook, the speaker housing and the magnetic field sensor are connected via the ear hook, and the speaker housing and the magnetic field sensor are clamped on both sides of the auricle via the ear hook.

9. The acoustic device according to claim 8, wherein: The ear hook includes a first ear hook and a second ear hook, the speaker housing includes a first speaker housing and a second speaker housing, and the acoustic device further includes a rear hook; wherein the first ear hook is connected to the first speaker housing, the second ear hook is connected to the second speaker housing, and the rear hook is connected to the first ear hook and the second ear hook.

10. The acoustic device according to claim 1, wherein: The acoustic device includes a control circuit configured to control an output state of the acoustic device according to a change in the spatial magnetic field.

11. The acoustic device according to claim 10, wherein: The magnetic field sensor reads the magnetic field strength of the spatial magnetic field in a specific direction, and the control circuit controls the output state of the acoustic device according to the magnetic field strength.

12. The acoustic device according to claim 11, wherein: The control circuit determines the threshold interval of the magnetic field strength and controls the output state of the acoustic device according to the threshold interval of the magnetic field strength, the threshold interval includes a first threshold interval and a second threshold interval, when the magnetic field strength is in the first threshold interval, the acoustic device is in the first output state; when the magnetic field strength is in the second threshold interval, the acoustic device is in the second output state.

13. The acoustic device according to claim 10, wherein: The magnetic field sensor includes at least two magnetic field sensitive components. The control circuit performs differential processing on the spatial magnetic field read by the at least two magnetic field sensitive components, and controls the output state of the acoustic device according to the differential result.

14. The acoustic device according to claim 10, wherein: The acoustic device further includes a proximity sensor, and the control circuit controls the output state of the acoustic device according to the detection result of the proximity sensor and the spatial magnetic field read by the magnetic field sensor.

15. A headset, comprising: The acoustic device according to any one of claims 1 to 14, wherein the control circuit identifies a wearing state of the earphone according to an output state of the acoustic device.

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