An apparatus for assisting in testing the electromagnetic compatibility of a hearing aid

Abstract

The utility model discloses a device for assisting test hearing aid electromagnetic compatibility relates to electromagnetic compatibility detection auxiliary device technical field. Its structure includes the hearing aid mounting shielding bin for installing hearing aid coupler and audio data acquisition card and the audio amplifier electromagnetic shielding bin for installing audio amplifier, and hearing aid coupler and audio data acquisition card are signal transmission through data connection line, and the hearing aid mounting shielding bin includes bottom bin, mounting bin, and the first round through -hole for hearing aid earplug is passed through and is opened to the symmetry of mounting bin both sides outer wall, and the symmetry of mounting bin both sides outer wall fixes a pair of arc hanging board. The utility model discloses a hearing aid mounting shielding bin and audio amplifier electromagnetic shielding bin design, effectively isolate external electromagnetic interference, and promote test accuracy, adopt metal conductive material and ground measure, strengthen electromagnetic shielding effect, and the modular design is convenient for operation maintenance, adapts research and development, production and quality inspection multistage demand, ensures that hearing aid performance is stable, and promotes user experience.

Description

Technical Field

[0001] This utility model belongs to the technical field of electromagnetic compatibility testing auxiliary devices, and in particular relates to a device for assisting in testing the electromagnetic compatibility of hearing aids. Background Technology

[0002] Electromagnetic compatibility (EMC) refers to the ability of a device or system to function normally in its electromagnetic environment without causing unacceptable electromagnetic interference to anything in that environment; electromagnetic interference refers to any electromagnetic phenomenon that may cause a degrade in the performance of a device, equipment, or system.

[0003] With the advancement of technology and the improvement of people's living standards, hearing aids, as important devices assisting people with hearing impairments, are receiving increasing attention for their performance and quality. Electromagnetic compatibility (EMC), as one of the key indicators of hearing aid performance stability, directly relates to the effectiveness of hearing aids in actual use and the user experience. Electromagnetic compatibility refers to the ability of a device or system to function normally in its electromagnetic environment without causing unacceptable electromagnetic interference to anything in that environment. For hearing aids, EMC mainly includes two aspects: first, the ability of hearing aids to maintain functional stability in complex electromagnetic environments and avoid performance degradation or failure due to external interference (interference resistance); second, the electromagnetic radiation generated by hearing aids during operation must be controlled within a reasonable range to avoid causing unacceptable electromagnetic interference to other devices (such as mobile phones, medical instruments, etc.) (external non-interference).

[0004] However, existing electromagnetic compatibility testing equipment and solutions for hearing aids have shortcomings. Some testing equipment lacks effective electromagnetic shielding measures in its design and implementation, leading to interference from external electromagnetic radiation and affecting the accuracy and reliability of the tests.

[0005] Therefore, developing an auxiliary testing device that can accurately simulate the complex electromagnetic environment that hearing aids may encounter in actual use and has effective electromagnetic shielding measures is of great significance for improving the accuracy and reliability of electromagnetic compatibility testing of hearing aids.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a device for assisting in testing the electromagnetic compatibility of hearing aids. By designing a hearing aid mounting shielding chamber and a speaker electromagnetic shielding chamber, and using conductive metal materials and grounding measures, it effectively isolates external electromagnetic interference, enhances the electromagnetic shielding effect, and solves the problem that existing testing equipment cannot fully simulate complex electromagnetic environments and that test results are subject to interference, thus ensuring accurate and reliable testing.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a device for assisting in testing the electromagnetic compatibility of hearing aids. It includes a hearing aid mounting shielding compartment for mounting a hearing aid coupler and an audio data acquisition card, and a speaker electromagnetic shielding compartment for mounting a speaker. The hearing aid coupler and the audio data acquisition card transmit signals via a data connection cable. The hearing aid mounting shielding compartment includes a base compartment and a mounting compartment that is fastened to the base compartment. Symmetrical first circular holes for the hearing aid earpieces to pass through are formed on both outer walls of the mounting compartment. A pair of arc-shaped hanging plates for hanging the ear hooks of the hearing aids are symmetrically fixed to both outer walls of the mounting compartment. Clamping plate assemblies for holding a pair of hearing aid couplers are installed on both inner walls of the mounting compartment, and the coupling ends of the hearing aid couplers are connected to the first circular holes. The speaker electromagnetic shielding compartment includes a base plate and a shielding mesh cover. The base compartment, mounting compartment, base plate, and shielding mesh cover are all made of conductive metal.

[0009] As a preferred embodiment of this utility model, the hearing aid mounting shielding chamber is connected to the ground via a first grounding wire; the speaker electromagnetic shielding chamber is connected to the ground via a second grounding wire. With the hearing aid mounting shielding chamber and the speaker electromagnetic shielding chamber being grounded, the electromagnetic shielding effect on the hearing aid coupler, speaker, and audio data acquisition card is ensured.

[0010] As a preferred embodiment of this utility model, the bottom compartment includes a first trough with an upward opening; a first flange plate is fixed to the opening end of the first trough; a plurality of pin holes are provided on the first flange plate; two conduits are fixedly through the side wall of the first trough; and a first terminal block connected to the first grounding wire is fixed to one side wall of the first trough.

[0011] As a preferred embodiment of this utility model, the outer end of the conduit is connected to a first metal corrugated pipe, and the signal line between the audio data acquisition card and the computer host with the audio analysis software installed passes through one of the first metal corrugated pipes.

[0012] As a preferred embodiment of this utility model, the mounting compartment includes a second groove with a lower opening that mates with the first groove; a second flange plate is fixed to the opening end of the second groove; and a plurality of pins are fixed to the second flange plate that engage with the pin holes.

[0013] As a preferred embodiment of this utility model, the clamping plate assembly includes two K-shaped clamping plates and bolts and nuts for connecting the two K-shaped clamping plates; one of the K-shaped clamping plates is fixed at both ends to the opposite inner walls of the second groove; the K-shaped clamping plate includes a rectangular plate; a V-shaped plate for clamping the hearing aid coupler is fixed at both ends of one side of the rectangular plate; a second through hole that mates with the bolts and nuts is provided in the center of the rectangular plate.

[0014] As a preferred embodiment of this utility model, the base plate includes a flat base; a ring is fixed on the upper surface of the flat base; a third flange plate is fixed on the outer wall of the ring; the ring and the third flange plate together have a first wire groove; a second terminal block connected to the second grounding wire is fixed on the flat base, and the speaker is placed on the flat base.

[0015] As a preferred technical solution of this utility model, the lower inner wall of the shielding mesh is in contact with the outer wall of the third flange plate; a second wire channel is provided at the corner of the lower end of the shielding mesh away from the first wire channel, and the speaker is covered inside the shielding mesh.

[0016] As a preferred embodiment of this utility model, a second metal corrugated pipe is connected to the outer end of the second wiring groove, and the audio cable between the speaker and the computer host with the audio analysis software installed passes through the second metal corrugated pipe.

[0017] This utility model has the following beneficial effects: This invention effectively isolates external electromagnetic interference by designing a shielding chamber for the hearing aid and an electromagnetic shielding chamber for the speaker, ensuring the purity of the testing environment and thus improving the accuracy of electromagnetic compatibility testing for hearing aids.

[0018] Both the hearing aid mounting shielding chamber and the speaker electromagnetic shielding chamber of this utility model are made of conductive metal and connected to the ground through a grounding wire, forming a good electromagnetic shielding system that effectively prevents the influence of external electromagnetic radiation on the testing process.

[0019] This utility model device adopts a modular design, and components such as hearing aid couplers, audio data acquisition cards, and speakers can be easily installed and disassembled, which improves testing efficiency and facilitates maintenance and upgrades.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram showing the relative placement of the device used in this utility model for assisting in testing the electromagnetic compatibility of hearing aids.

[0023] Figure 2 A schematic diagram of the structure for mounting a shielding chamber on a hearing aid.

[0024] Figure 3 This is a schematic diagram of the electromagnetic shielding chamber of a speaker.

[0025] Figure 4 This is a schematic diagram of the bottom compartment.

[0026] Figure 5 This is a schematic diagram of the structure when the hearing aid coupler is held in place by the internal clamping plate assembly.

[0027] Figure 6 This is a structural diagram of the mounting bay and the K-shaped clamp.

[0028] Figure 7 This is a structural diagram of the base plate.

[0029] Figure 8 This is a schematic diagram of the shielding mesh cover.

[0030] The attached diagram lists the components represented by each number as follows: 1-Hearing aid mounting shielding compartment, 2-Speaker electromagnetic shielding compartment, 3-Hearing aid coupler, 4-Bottom compartment, 41-First slot, 42-First flange plate, 43-Pin hole, 44-Wire conduit, 45-First terminal block, 5-Mounting compartment, 51-First through hole, 52-Arc-shaped hanging plate, 53-Second slot, 54-Second flange plate, 55-Pin rod, 6-Clamping plate assembly, 61-K-shaped clamping plate, 611-Rectangular plate, 612-V-shaped plate, 62-Bolt and nut, 7-Base plate, 71-Flat base, 72-Ring, 73-Third flange plate, 74-First wire conduit, 75-Second terminal block, 8-Shielding mesh cover, 81-Second wire conduit, 9-First metal corrugated pipe, 10-Second metal corrugated pipe. Detailed Implementation

[0031] 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 scope of protection of the present utility model.

[0032] Specific Implementation Example 1: Please refer to Figure 1-8 As shown, this utility model is a device for assisting in testing the electromagnetic compatibility of hearing aids. It includes a hearing aid mounting shielding chamber 1 for mounting a hearing aid coupler 3 and an audio data acquisition card, and a speaker electromagnetic shielding chamber 2 for mounting a speaker. The hearing aid coupler 3 is a combination of a hearing aid coupling cavity and a preamplifier. Signal transmission between the hearing aid coupler 3 and the audio data acquisition card is achieved via a data connection cable. Both the hearing aid mounting shielding chamber 1 and the speaker electromagnetic shielding chamber 2 are made of conductive metal to ensure good electromagnetic shielding performance.

[0033] The hearing aid mounting shielding compartment 1 includes a base compartment 4 and a mounting compartment 5 that is fastened to the base compartment 4. The base compartment 4 is composed of a first groove 41 with an upward opening. A first flange plate 42 is fixed to the open end of the first groove 41, and the first flange plate 42 has several pin holes 43. Two conduits 44 are fixed through the side wall of the first groove 41 for passing the signal line between the audio data acquisition card and the computer host. The outer end of the conduit 44 is connected to a first metal corrugated pipe 9 to further enhance the electromagnetic shielding effect. A first terminal 45 connected to a first grounding wire is fixed to one side wall of the first groove 41 for grounding the hearing aid mounting shielding compartment 1.

[0034] The mounting compartment 5 includes a second groove 53 with a lower opening that mates with the first groove 41. A second flange plate 54 is fixed to the open end of the second groove 53. Several pins 55, which engage with pin holes 43, are fixed on the second flange plate 54 to fix the mounting compartment 5 to the bottom compartment 4. Symmetrical first through holes 51 for hearing aid earplugs to pass through are opened on both outer walls of the mounting compartment 5. A pair of arc-shaped hanging plates 52 for hanging hearing aid ear hooks are also symmetrically fixed on both outer walls. Clamping plate assemblies 6 for holding a pair of hearing aid couplers 3 are installed on the inner walls of both sides of the mounting compartment 5. The clamping plate assembly 6 includes two K-shaped clamping plates 61 and bolts and nuts 62 for connecting the two K-shaped clamping plates 61. The K-shaped clamping plate 61 includes a rectangular plate 611. A V-shaped plate 612 for holding the hearing aid coupler 3 is fixed to each end of one side of the rectangular plate 611. A second through hole mates with the bolts and nuts 62 is opened in the center of the rectangular plate 611. The coupling end of the hearing aid coupler 3 is connected to the first through hole 51 so as to couple with the hearing aid earpiece.

[0035] The speaker electromagnetic shielding chamber 2 includes a base plate 7 and a shielding mesh cover 8. The base plate 7 is composed of a flat base 71, with a ring 72 fixed to the upper surface of the flat base 71, and a third flange plate 73 fixed to the outer wall of the ring 72. The ring 72 and the third flange plate 73 together have a first wiring groove 74 for passing through the audio cable between the speaker and the computer host, as well as the speaker's power cable. A second terminal 75 connected to the second grounding wire is fixed on the flat base 71 for grounding the speaker electromagnetic shielding chamber 2. The lower inner wall of the shielding mesh cover 8 contacts the outer wall of the third flange plate 73, forming a good electromagnetic seal. A second wiring groove 81 is formed at the corner of the lower end of the shielding mesh cover 8 away from the first wiring groove 74. A second metal corrugated pipe 10 is connected to the outer end of the second wiring groove 81, and the audio cable passes through the second metal corrugated pipe 10 to further enhance the electromagnetic shielding effect.

[0036] A specific test process in this embodiment is as follows: 1. Preparation stage: Place the hearing aid mounting shielding chamber 1 and the speaker electromagnetic shielding chamber 2 on the test bench, ensuring sufficient distance between them to reduce mutual interference. Install the hearing aid coupler 3 on the clamp assembly 6 of the mounting chamber 5, ensuring the coupling end is aligned with the first through hole 51. Pass the hearing aid earpiece to be tested through the first through hole 51 and hang it on the arc-shaped mounting plate 52, ensuring the hearing aid is stably fixed. Place the speaker on the flat base 71 of the speaker electromagnetic shielding chamber 2 and cover it with the shielding mesh cover 8 to ensure the speaker is isolated from the external electromagnetic environment. Connect the signal cable between the audio data acquisition card and the computer host, passing it through the first metal corrugated pipe 9; connect the audio cable between the speaker and the computer host, passing it through the second metal corrugated pipe 10. Ground the hearing aid mounting shielding chamber 1 and the speaker electromagnetic shielding chamber 2 respectively through the first grounding wire and the second grounding wire to ensure the electromagnetic shielding effect of the test environment.

[0037] 2. Testing Phase: Launch the audio analysis software and set the test parameters, including the test frequency range, sound pressure level, and test time. An audio signal of specific frequency and amplitude is generated using an audio generator and input to a speaker for playback, simulating sound input in different scenarios. Simultaneously, interference signals of various frequencies and modulation methods are generated using a signal source and input to a GTEM chamber to simulate a complex electromagnetic environment, performing radiated immunity testing on the hearing aid. An audio data acquisition card collects the hearing aid's output signal under interference signals in real time and transmits it to a computer for analysis and processing. Observe and record the hearing aid's performance under different interference signals, including parameters such as output sound pressure level, distortion, and frequency response.

[0038] 3. Results Analysis Stage: Based on test data, the anti-interference capability of hearing aids in complex electromagnetic environments is analyzed, and their electromagnetic compatibility is assessed to ensure compliance with relevant standards. For hearing aids that do not meet the standards, the reasons are further analyzed, and improvement measures and suggestions are proposed. A test report is compiled, including the test objectives, test methods, test results, conclusions, and recommendations, providing strong support for the research and development and production of hearing aids.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for assisting in testing the electromagnetic compatibility of hearing aids, characterized in that: Includes a hearing aid mounting shielding chamber (1) for mounting a hearing aid coupler (3) and an audio data acquisition card, and a speaker electromagnetic shielding chamber (2) for mounting a speaker. The hearing aid mounting shielding compartment (1) includes a base compartment (4) and a mounting compartment (5) that is fastened to the base compartment (4); the mounting compartment (5) has symmetrical first through holes (51) on both sides of its outer wall for the hearing aid earplug to pass through; a pair of arc-shaped hanging plates (52) for hanging the hearing aid ear hooks are symmetrically fixed on both sides of its outer wall; the mounting compartment (5) has clamping plate assemblies (6) for clamping a pair of hearing aid couplers (3) installed on both sides of its inner wall, and the coupling end of the hearing aid coupler (3) is connected to the first through hole (51); The speaker electromagnetic shielding chamber (2) includes a base plate (7) and a shielding mesh cover (8).

2. The device for assisting in testing the electromagnetic compatibility of hearing aids according to claim 1, characterized in that, The hearing aid mounting shielding chamber (1) is connected to the ground via a first grounding wire; the speaker electromagnetic shielding chamber (2) is connected to the ground via a second grounding wire.

3. The device for assisting in testing the electromagnetic compatibility of hearing aids according to claim 2, characterized in that, The bottom compartment (4) includes a first trough (41) with an upward opening; a first flange plate (42) is fixed at the opening end of the first trough (41); a plurality of pin holes (43) are provided on the first flange plate (42); two conduits (44) are fixed through the side wall of the first trough (41); a first terminal block (45) connected to the first grounding wire is fixed on one side wall of the first trough (41).

4. The apparatus for assisting in testing the electromagnetic compatibility of hearing aids according to claim 3, characterized in that, The outer end of the conduit (44) is connected to a first metal corrugated pipe (9).

5. The apparatus for assisting in testing the electromagnetic compatibility of hearing aids according to claim 3 or 4, characterized in that, The mounting compartment (5) includes a second groove (53) with a lower opening that mates with the first groove (41); a second flange plate (54) is fixed at the opening end of the second groove (53); and a plurality of pins (55) are fixed on the second flange plate (54) and are engaged with the pin holes (43).

6. The apparatus for assisting in testing the electromagnetic compatibility of hearing aids according to claim 5, characterized in that, The clamping plate assembly (6) includes two K-shaped clamping plates (61) and bolts and nuts (62) for connecting the two K-shaped clamping plates (61); one of the K-shaped clamping plates (61) is fixed at both ends to the opposite inner walls of the second groove (53); the K-shaped clamping plate (61) includes a rectangular plate (611); a V-shaped plate (612) for clamping the hearing aid coupler (3) is fixed at both ends of one side of the rectangular plate (611); a second through hole that mates with the bolts and nuts (62) is provided in the center of the rectangular plate (611).

7. The apparatus for assisting in testing the electromagnetic compatibility of hearing aids according to claim 2, characterized in that, The base plate (7) includes a flat base (71); a ring (72) is fixed on the upper surface of the flat base (71); a third flange plate (73) is fixed on the outer wall of the ring (72); the ring (72) and the third flange plate (73) are provided with a first wire groove (74); a second terminal (75) connected to the second grounding wire is fixed on the flat base (71).

8. The apparatus for assisting in testing the electromagnetic compatibility of hearing aids according to claim 7, characterized in that, The lower inner wall of the shielding mesh cover (8) is in contact with the outer wall of the third flange plate (73); a second wire groove (81) is provided at the corner of the lower end of the shielding mesh cover (8) away from the first wire groove (74).

9. The apparatus for assisting in testing the electromagnetic compatibility of hearing aids according to claim 8, characterized in that, The outer end of the second threading groove (81) is connected to a second metal corrugated pipe (10).

Images