Ear-wearable device directivity testing system

Abstract

The utility model discloses an ear -wearing device directivity test system belongs to sound acquisition directivity test technical field, this ear -wearing device directivity test system, including first support structure, second support structure, the artificial head of assembling in first support structure and the sound source equipment of assembling in second support structure in first direction. Through the first support structure and the second support structure of constructing the support of artificial head and sound source equipment, based on the structure design of first support structure and second support structure, the relative position of artificial head and sound source equipment can be adjusted, that is, vertical directivity test can be realized based on the pitch motion of sound source equipment and / or artificial head, full coverage of actual use scene is realized.

Description

Technical Field

[0001] This utility model belongs to the field of sound acquisition directional testing technology, specifically relating to a directional testing system for ear-worn devices. Background Technology

[0002] Directivity helps smart sound-acquiring wearable devices such as headphones and hearing aids effectively focus sounds from the front in noisy environments, suppressing voices or noise from the rear or sides, thereby improving the signal-to-noise ratio. It is one of the core functions for improving speech intelligibility in noisy environments. The directivity index (DI) is also relevant. 2D It is a function of frequency, and it is calculated from the sound intensity level at zero angle to the sound source and the sound intensity level at other angles.

[0003] Testing the directional performance of ear-worn smart wearable devices to ensure that the actual sound pickup angle matches the preset angle is an essential part of product development and optimization. Existing testing systems only cover horizontal directional testing and cannot fully cover actual usage scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a directional testing system for ear-worn devices to solve the problems mentioned in the background art.

[0005] In a first aspect, this application provides a directional testing system for an ear-worn device, comprising: First supporting structure; The second support structure is spaced apart from the first support structure in the first direction, and the first support structure and / or the second support structure are configured to be linearly movable along the first direction; An artificial head is mounted on a first support structure and constitutes a wearable carrier for an ear-worn device. The artificial head is configured to rotate around a first virtual axis, which is parallel to a third direction. A sound source device, mounted on a second support structure, is used to output sound signals outward. The artificial head and / or the sound source device is configured to be linearly movable along a third direction, and the sound source device is configured to be rotatable about a second virtual axis, which is parallel to a second direction.

[0006] Optionally, the testing system may also include a microphone located at the output of the sound source device.

[0007] Optionally, the first support structure includes: The first support axis extends along a third direction; A first adjusting shaft, one end of which is connected to the top of the first support shaft, and the other end extends in a third direction and is connected to the artificial head; The turntable component is fixed to the bottom end of the first support shaft.

[0008] Optionally, the second support structure includes: The second support axis extends along a third direction; The second adjusting shaft has one end connected to the top of the second support shaft and the other end extending in a third direction; A fixing base is fixed to the top end of the second adjusting shaft; The rotating block is rotatably mounted on the fixed base and connected to the sound source device.

[0009] Optionally, the testing system further includes a track member extending along a first direction, and the second support structure is configured to slide on the track member.

[0010] Optionally, the testing system further includes a enclosure structure, which defines a testing space for accommodating the first support structure, the second support structure, the sound source device, and the artificial head.

[0011] Optionally, the enclosure structure includes multiple walls, each wall consisting of a perforated plate filled with sound-absorbing material.

[0012] Secondly, this application provides a directional testing system for an ear-worn device, comprising: First supporting structure; The second support structure is spaced apart from the first support structure in the first direction, and the first support structure and / or the second support structure are configured to be linearly movable along the first direction; An artificial head is mounted on a first support structure and constitutes a wearable carrier for an ear-worn device. The artificial head is configured to rotate around a second virtual axis, which is parallel to a second direction. A sound source device, mounted on a second support structure, is used to output sound signals outward. The artificial head and / or the sound source device is configured to be linearly movable along a third direction, and the sound source device is configured to be rotatable about a first virtual axis, which is parallel to the third direction.

[0013] Thirdly, this application provides a directional testing system for an ear-worn device, comprising: First supporting structure; The second support structure is spaced apart from the first support structure in the first direction, and the first support structure and / or the second support structure are configured to be linearly movable along the first direction; An artificial head is mounted on a first support structure and constitutes a wearable carrier for an ear-worn device. The artificial head is configured to rotate around a first virtual axis and a second virtual axis. The first virtual axis is parallel to a third direction, and the second virtual axis is parallel to a second direction. A sound source device, mounted on a second support structure, is used to output sound signals outward, and the artificial head and / or sound source device is configured to be linearly movable in a third direction.

[0014] Fourthly, this application provides a directional testing system for ear-worn devices, comprising: First supporting structure; The second support structure is spaced apart from the first support structure in the first direction, and the first support structure and / or the second support structure are configured to be linearly movable along the first direction; An artificial head is assembled on the first support structure and constitutes the wearable carrier of the ear-worn device; A sound source device, mounted on a second support structure, is used to output sound signals outward. The artificial head and / or the sound source device is configured to be linearly movable along a third direction, and the sound source device is configured to rotate around a first virtual axis and a second virtual axis. The first virtual axis is set parallel to the third direction, and the second virtual axis is set parallel to the second direction.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This application constructs a first support structure and a second support structure to support the artificial head and the sound source device. Based on the structural design of the first support structure and the second support structure, the relative position of the artificial head and the sound source device can be adjusted. That is, the vertical directivity test can be achieved based on the pitch movement of the sound source device and / or the artificial head, thus achieving full coverage of actual use scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a test system for one embodiment of this application. Figure 1 ; Figure 2 for Figure 1 Enlarged view of a portion of the image; Figure 3 This is a schematic diagram of a test system for one embodiment of this application. Figure 2 ; Figure 4 This is a schematic diagram of a test system according to another embodiment of this application; Figure 5 This is a schematic diagram of a test system according to another embodiment of this application.

[0017] In the picture: 10. Artificial head; 20. Sound source equipment; 21. Microphone; 30. First support structure; 300. First support shaft; 301. First adjusting shaft; 302. Turntable component; 40. Second support structure; 400. Second support shaft; 401. Second adjusting shaft; 402. Fixed seat; 403. Rotating block; 50. Track components; 60. Enclosure structure; 600. Wall. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The ear-worn device of this utility model can be a hearing aid, earphone, noise-canceling translation earphone, and smart glasses, etc., which are intelligent ear-worn sound acquisition devices with directional characteristics. In this application, the composition and principle of the ear-worn device directional testing system (hereinafter referred to as the testing system) are described using a hearing aid as an example.

[0020] Example 1: Reference Figure 1 ,based on Figure 1 The center direction is labeled to indicate the location, wherein the first direction and the second direction are located on the same plane (e.g., a horizontal plane) and are perpendicular to each other, and the third direction is perpendicular to the plane containing the first and second directions, for example, configured as a vertical direction. The test system of this embodiment includes a first support structure 30 and a second support structure 40 spaced apart in the first direction, and the first support structure 30 and / or the second support structure 40 are configured to be linearly movable along the first direction, that is, the spacing between the first support structure 30 and the second support structure 40 in the first direction is adjustable, and they can move relative to each other. For example, refer to... Figure 1The aforementioned second support structure 40 is mounted on, for example, a track member 50, which extends along a first direction. The distance between the first support structure 30 and the second support structure 40 is adjusted based on the movement of the second support structure 40 on the track member 50. In some examples, the track member 50 is a linear slide rail, and correspondingly, the second support structure 40 is mounted on a slider of the linear slide rail. The second support structure 40 moves by sliding the slider. It should be noted that this application is not limited to a linear slide rail 50; any structure that allows the relative positions of the first support structure 30 and the second support structure 40 to change within the same plane is acceptable. For example, the second support structure 40 can be equipped with pulleys, a drag plate, or other structures.

[0021] Continue to refer to Figure 1 The aforementioned testing system also includes an artificial head 10 mounted on the top of the first support structure 30 and a sound source device 20 mounted on the top of the second support structure 40. The artificial head 10 serves as a wearable carrier for an ear-worn device, simulating the actual wearing scenario of a hearing aid. The artificial head 10 can be configured with a simulated ear to collect audio after hearing aid effects for further analysis. This application uses an artificial mouth 20 as an example of the sound source for the testing system, but it is not limited to artificial mouths; any device capable of emitting sound is applicable. The sound source device 20 can emit sound under the excitation of an audio signal to output a sweep frequency or speech signal (sound signal). In some examples, the aforementioned testing system also includes a microphone 21 disposed at the output end of the sound source device 20 for calibrating the output signal of the sound source device 20 to reproduce speech.

[0022] Continue to refer to Figure 1The aforementioned artificial head 10 and / or artificial mouth 20 are configured to move linearly along a third direction to achieve height adjustment of the artificial head 10 and / or artificial mouth 20. In some examples, in order to achieve independent height adjustment of the artificial head 10 and artificial mouth 20 to achieve test simulation in different scenarios (e.g., simulation of dialogue environment for people of different heights), the aforementioned artificial head 10 and artificial mouth 20 are both configured to move linearly along a third direction. Specifically, the first support structure 30 includes a first support shaft 300 and a first adjustment shaft 301 extending in a third direction. One end of the first adjustment shaft 301 is connected to the top of the first support shaft 300, and the other end is connected to the artificial head 10. The height of the artificial head 10 is adjusted based on the function of the first adjustment shaft 301. In some examples, the first support shaft 300 and the first adjustment shaft 301 together form a telescopic rod, and the position adjustment of the artificial head 10 and the artificial mouth 20 is achieved by the extension and retraction of the height adjustment shaft. In other examples, the first adjustment shaft 301 is configured as, for example, an electric telescopic rod to independently achieve the height adjustment of the artificial head 10. Corresponding to the first support structure 30, the second support structure 40 includes a second support shaft 400 and a second adjustment shaft 401 extending in a third direction. One end of the second adjustment shaft 401 is connected to the top of the second support shaft 400, and the other end is connected to the artificial mouth 20. The height adjustment of the artificial mouth 20 is the same as the height adjustment of the artificial head 10, and will not be described in detail here.

[0023] Continue to refer to Figure 1 The aforementioned artificial head 10 is configured to rotate around a first virtual axis O1, wherein the first virtual axis O1 is set parallel to a third direction to achieve adjustment of the horizontal angle of the artificial head 10. In this embodiment, the first virtual axis O1 and the axis of the first support shaft 300 coincide. Specifically, the aforementioned first support structure 30 also includes a turntable component 302 fixed to the bottom end of the first support shaft 300. The turntable component 302 is provided with a rotary drive component such as a motor, and the output end of the rotary drive component is connected to the bottom end of the first support shaft 300. The rotary drive component drives the first support shaft 300 and the artificial head 10 to rotate.

[0024] Continue to refer to Figure 2 The artificial mouth 20 is configured to rotate around a second virtual axis O2, wherein the second virtual axis O2 is parallel to a second direction, so as to realize the adjustment of the pitch angle of the artificial mouth 20. Specifically, the second support structure 40 also includes a fixed seat 402 fixed to the top of the second adjustment shaft 401 and a rotating block 403 rotatably mounted on the fixed seat 402, and the rotating block 403 is connected to the artificial mouth 20. In some examples, the fixed seat 402 is a U-shaped seat.

[0025] In some embodiments, refer to Figure 3The aforementioned enclosure structure 60 defines a test space within which the first support structure 30, the second support structure, the artificial mouth 20, and the artificial head 10 are accommodated. This enclosure structure 60 is used to construct the required test environment (i.e., an environment with low noise floor and low sound reflection). In some embodiments, the enclosure structure 60 includes multiple walls 600, which isolate the first support structure 30, the second support structure, the artificial mouth 20, and the artificial head 10 in different directions. Figure 3 The example provides a wall 600 disposed in a first direction and a second direction. In some examples, walls 600 are arranged in the first direction, the second direction and the third direction to construct a closed test environment. In some examples, the wall 600 is composed of a porous plate filled with sound-absorbing material.

[0026] The workflow of the above testing system can be as follows: Horizontal directionality: 1. Install the artificial head 10 and artificial mouth 20 according to the attached diagram.

[0027] 2. When the system software control interface is input with the height of the reference point of the artificial head 10 being 1.6m and the height of the output reference point of the artificial mouth 20 being 1.6m, the distance between the two reference points being 1m, and the angle of the artificial mouth 20 being 0° (horizontal direction), the system control unit will adjust the two reference points according to the preset parameters.

[0028] 3. Adjust the input signal level of the artificial mouth 20 so that the sound pressure level in the simulated ear is 60dB in the frequency range of 200Hz to 8000Hz.

[0029] 4. Place the hearing aid on the artificial head 10 (unless otherwise specified, the right ear of the artificial head 10 should be used).

[0030] 5. The control unit controls the turntable component 302 to rotate clockwise at 10° azimuth intervals according to the set mode. At the same time, at each angle, at a 1 / 3 octave point, within the frequency range of 200Hz to 8000Hz, the frequency response in the ear simulator is measured, which is the directional response simulating the actual working conditions.

[0031] 6. Based on the directional response under simulated actual working conditions with an azimuth angle of zero degrees, calculate the directional index of the hearing aid, and automatically provide directional patterns at representative frequency points of 400Hz, 800Hz, 1600Hz, 2500Hz, and 4000Hz after the test is completed.

[0032]

[0033] In the formula:

[0034] Vertical orientation: Steps 1 and 2 are the same as horizontal directional steps 1 and 2.

[0035] 3. Adjust the input signal level of the artificial mouth 20 using the standard microphone 21 so that the sound pressure level at the reference point of the artificial mouth 20 is 89dB in the frequency range of 100Hz to 10kHz. Calibrate the output sound field of the artificial mouth 20 to realistically reproduce and simulate the speech signal of a person speaking to another speaker.

[0036] 4. The artificial mouth plays test data, such as Polqa_Chinese (audio sampling value greater than 5k), and the artificial ear records the sound reception when the actual azimuth and horizontal angles of the hearing aid are both 0°.

[0037] 5. The system software control interface inputs the following: the artificial head 10 reference point height remains at, for example, 1.6m (simulating adult height, the height of the center point of both ears from the ground; this can be changed according to actual needs, and subsequent value selections follow the same principle); the artificial mouth 20 outputs a reference point height of 1.2m (simulating the actual sitting height of an adult, the height of the lower mouth from the ground); and the angles of the two reference points are specified (positive angles are defined as the elevation angle of the artificial mouth 20, and negative angles as the depression angle of the artificial mouth 20). The system control unit then adjusts the two reference points according to the preset parameters.

[0038] 6. Wear the hearing aid in artificial head 10 (unless otherwise specified, use the right ear of artificial head 10); 7. The system control unit, according to the set mode, controls the artificial mouth 20 to start at an elevation angle of 10 degrees, increasing the angle at 10-degree intervals. At each angle, the system automatically calculates the distance of the artificial mouth 20 and controls the artificial mouth 20 to reach the specified distance and play the test data. For example, at an elevation angle of 10 degrees, the distance between the two reference points is (1.6m~1.2m) / tan10°=2.27m.

[0039] 8. At each angle, the artificial mouth 20 plays the test data, and the artificial ear picks up and records the actual sound reception of the hearing aid at that angle. The effective speech amplitude at that angle is compared with the effective speech amplitude in step 4. If the amplitude difference is >30dB, it is considered that the sound reception effect of the hearing aid at that actual vertical angle is suppressed.

[0040] 9. Continue testing at other elevation angles. When the sound reception is suppressed, the elevation angle test should be terminated; otherwise, it should be stopped at an angle of 80°.

[0041] 10. The system software control interface inputs the height of the reference point of the artificial head 10 as 1.2m, and the artificial mouth 20 outputs the reference point height as 1.6m and the angle between the two reference points (-10 degrees). The system control unit then adjusts the two reference points according to the preset parameters.

[0042] 11. Perform the sound reception effect test at the downward angle according to steps 7 and 8. When the sound reception is suppressed, the test at the upward angle shall be terminated; otherwise, it shall be terminated at an angle of -80°.

[0043] 12. Output the vertical sound reception angle range, which simulates the vertical sound reception angle in actual use scenarios.

[0044] Example 2: Reference Figure 4 In Embodiment 2, the overall structure of the testing system is the same as that of the system that implements the testing system, namely the first support structure 30, the second support structure 40, and the linear slide rail 50, which are set up in the same way as in Embodiment 1. The difference is that in this embodiment, the artificial head 10 is configured to rotate around the second virtual axis O2, which is parallel to the second direction. Correspondingly, the artificial mouth 20 is configured to rotate around the first virtual axis O1, which is parallel to the third direction. The specific rotation implementation method and usage steps in this embodiment are similar to those in Embodiment 1, and will not be described in detail here.

[0045] Example 3: Reference Figure 5 In Embodiment 2, the overall structure of the test system and the components of the test system, namely the first support structure 30, the second support structure 40, and the linear slide rail 50, are the same as in Embodiment 1, and will not be described in detail here. The difference is that in this embodiment, the rotation of the artificial mouth 20 is limited. Correspondingly, the artificial head 10 is configured to rotate around the first virtual axis O1 and the second virtual axis O2. The method of rotation is as follows: Figure 5 The description of Example 1 will not be repeated here.

[0046] Example 4: The configuration of the test system in Embodiment 4 is roughly the same as that in Embodiment 3. The difference is that in this embodiment, the rotation of the artificial head 10 is limited. Correspondingly, the artificial mouth 20 is configured to rotate around the first virtual axis O1 and the second virtual axis O2. The first virtual axis O1 is set parallel to the third direction, and the second virtual axis O2 is set parallel to the second direction. The rotation is implemented in the same way as in Embodiment 3, and will not be described in detail here.

[0047] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0048] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0049] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0050] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0051] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0052] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A system for testing the directional properties of an ear-worn device, characterized in that, include: First support structure (30); The second support structure (40) is spaced apart from the first support structure (30) in the first direction, and the first support structure (30) and / or the second support structure (40) are configured to be linearly movable along the first direction; An artificial head (10) is mounted on a first support structure (30) and constitutes a wearable carrier for an ear-worn device. The artificial head (10) is configured to rotate around a first virtual axis (O1), which is parallel to a third direction. A sound source device (20) is mounted on a second support structure (40) and is used to output sound signals. The artificial head (10) and / or the sound source device (20) are configured to be linearly movable along a third direction, and the sound source device (20) is configured to be rotatable about a second virtual axis (O2), which is parallel to a second direction.

2. The ear-worn device directivity testing system according to claim 1, characterized in that: The test system also includes a microphone (21) located at the output of the sound source device (20).

3. The ear-worn device directivity testing system according to claim 1, characterized in that: The first support structure (30) includes: The first support shaft (300) extends along a third direction; The first adjustment shaft (301) has one end connected to the top of the first support shaft (300) and the other end extending in a third direction and connected to the artificial head (10). The turntable component (302) is fixed to the bottom end of the first support shaft (300).

4. The ear-worn device directivity testing system according to claim 1, characterized in that: The second support structure (40) includes: The second support shaft (400) extends along a third direction; The second adjusting shaft (401) has one end connected to the top of the second support shaft (400) and the other end extending in a third direction; A fixed base (402) is fixed to the top end of the second adjusting shaft (401); The rotating block (403) is rotatably mounted on the fixed base (402) and connected to the sound source device (20).

5. The ear-worn device directivity testing system according to claim 1, characterized in that: The test system also includes a track member (50) extending along a first direction, and the second support structure (40) is configured to slide on the track member (50).

6. The ear-worn device directivity testing system according to claim 1, characterized in that: The testing system also includes a enclosure structure (60) that defines a testing space for accommodating the first support structure (30), the second support structure (40), the sound source device (20), and the artificial head (10).

7. The ear-worn device directivity testing system according to claim 6, characterized in that: The enclosure structure (60) includes multiple walls (600), each wall (600) being composed of a perforated plate filled with sound-absorbing material.

8. A system for testing the directional properties of an ear-worn device, characterized in that, include: First support structure (30); The second support structure (40) is spaced apart from the first support structure (30) in the first direction, and the first support structure (30) and / or the second support structure (40) are configured to be linearly movable along the first direction; An artificial head (10) is mounted on a first support structure (30) and constitutes a wearable carrier for an ear-worn device. The artificial head (10) is configured to rotate around a second virtual axis (O2), which is parallel to a second direction. A sound source device (20) is mounted on a second support structure (40) and is used to output sound signals. The artificial head (10) and / or the sound source device (20) are configured to be linearly movable along a third direction, and the sound source device (20) is configured to be rotatable about a first virtual axis (O1), which is parallel to the third direction.

9. A system for testing the directional properties of an ear-worn device, characterized in that, include: First support structure (30); The second support structure (40) is spaced apart from the first support structure (30) in the first direction, and the first support structure (30) and / or the second support structure (40) are configured to be linearly movable along the first direction; An artificial head (10) is mounted on a first support structure (30) and constitutes a wearable carrier for an ear-worn device. The artificial head (10) is configured to rotate around a first virtual axis (O1) and a second virtual axis (O2). The first virtual axis (O1) is set parallel to a third direction, and the second virtual axis (O2) is set parallel to a second direction. A sound source device (20), mounted on a second support structure (40), is used to output sound signals to the outside, and the artificial head (10) and / or the sound source device (20) is configured to be linearly movable in a third direction.

10. A system for testing the directional properties of an ear-worn device, characterized in that, include: First support structure (30); The second support structure (40) is spaced apart from the first support structure (30) in the first direction, and the first support structure (30) and / or the second support structure (40) are configured to be linearly movable along the first direction; The artificial head (10) is assembled on the first support structure (30) and constitutes the wearable carrier of the ear-worn device; A sound source device (20) is mounted on a second support structure (40) and is used to output sound signals. The artificial head (10) and / or the sound source device (20) are configured to be linearly movable along a third direction, and the sound source device (20) is configured to rotate about a first virtual axis (O1) and a second virtual axis (O2). The first virtual axis (O1) is set parallel to the third direction, and the second virtual axis (O2) is set parallel to the second direction.

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