Hearing device testing equipment

Abstract

The utility model belongs to the technical field of testing equipment, and particularly relates to hearing protector testing equipment which comprises a testing table, a through hole is formed between the top and the bottom of the testing table in a penetrating mode, a hollow rotating shaft is rotatably installed on the inner side of the through hole, and an adjustable head-shaped model is arranged on the top of the hollow rotating shaft. The adjustable head-shaped model comprises an inner-layer silica gel filling body connected with the top of the hollow rotating shaft, the outer side of the inner-layer silica gel filling body is coated with an air bag, the outer side of the air bag is coated with an outer-layer silica gel layer, the two sides of the outer-layer silica gel layer are inwards provided with inwards-concave ear mold magnetic suction grooves, ear molds are arranged on the inner sides of the ear mold magnetic suction grooves, and the outer side of the outer-layer silica gel layer is provided with an outer-layer silica gel layer. A silica gel simulation ear canal is connected between the inner side of the ear mold magnetic suction groove and the inner-layer silica gel filling body, a sensor is installed at the tail end of the silica gel simulation ear canal and located in the inner-layer silica gel filling body, through the arrangement of the air bag structure, the perimeter of the cross section of the adjustable human head-shaped model can be changed, and the simulation test requirements of different head circumference lengths are met.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, and specifically relates to a hearing protector testing device. Background Technology

[0002] Hearing protectors are devices used to protect the auditory organs from noise damage. They are usually placed in the external auditory canal, on the inner surface of the auricle, or covered on the ear or even a large part of the head. They mainly reduce noise by absorbing and insulating sound. Their actual sound insulation ability is not only related to their material composition, structure, and shape, but also closely related to the path of sound transmission to the inner ear.

[0003] When designing and manufacturing hearing protectors, it is necessary to conduct effective testing on the designed products to check their sound insulation performance. Generally, this type of testing is carried out using a human head model with built-in microphones, acoustic couplers and other sensors. The human head model is placed in an acoustic test chamber, the hearing protector is worn on the human head model, and noise is played. The amount of noise transmitted to the sensors inside the human head model is detected to obtain the test results. However, in the current technology, human head models are all of fixed size. If it is necessary to simulate the wearing test of hearing protectors by human heads of different head sizes, it is necessary to produce human head models of various specifications, which is costly. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a hearing protector testing device that, through the setting of an airbag structure, can change the cross-sectional perimeter of an adjustable human head model to meet the simulation testing needs of different head circumferences.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hearing protection testing device, including a testing platform, a through hole between the top and bottom of the testing platform, a hollow rotating shaft rotatably mounted inside the through hole, an adjustable human head-shaped model on the top of the hollow rotating shaft, the adjustable human head-shaped model including an inner silicone filler connected to the top of the hollow rotating shaft, an air bladder covering the outer side of the inner silicone filler, an outer silicone layer covering the outer side of the air bladder, concave ear mold magnetic suction grooves on both sides of the outer silicone layer, an ear mold inside the ear mold magnetic suction groove, a silicone simulated ear canal connected between the inner side of the ear mold magnetic suction groove and the inner silicone filler, a sensor installed at the end of the silicone simulated ear canal inside the inner silicone filler, an air pump and a motor installed at the bottom of the testing platform, a first pulley fixedly sleeved on the outer side of the hollow rotating shaft, the output end of the motor connected to a second pulley, and a belt connecting the first pulley and the second pulley.

[0006] The beneficial effects of this invention are as follows: When using this device, the earmold can be replaced. Since the earmold and the magnetic groove are magnetically connected by a magnetic block, the earmold can be directly removed and replaced with an earmold of a different ear size. The new earmold is simply inserted into the magnetic groove and magnetically attracted by the magnetic block. This rapid replacement of different earmolds meets the simulation testing needs of ears of different sizes and shapes. Simultaneously, this device can also adjust the cross-sectional perimeter of the adjustable human head model to meet the simulation testing needs of different head circumferences. When adjusting the adjustable human head model, the air pump can be controlled to inflate and deflate the airbag through the second and first air supply pipes. The expansion or contraction of the airbag causes the outer silicone layer, which has deformation and extensibility, to expand or contract. Simultaneously, the silicone simulated ear canal can also stretch or contract with the change in the outer silicone layer, thereby changing the cross-sectional perimeter of the adjustable human head model to meet the simulation testing needs of different head circumferences.

[0007] The adjustable head-shaped model of this device can rotate. It only requires controlling the motor to drive the second pulley to rotate. The second pulley drives the first pulley and the hollow shaft to rotate through the belt, thereby causing the adjustable head-shaped model and the hearing protector on the outside of the adjustable head-shaped model to rotate. This better simulates the head rotation of the user during daily use of the hearing protector and improves the test results.

[0008] As a further improvement to the above technical solution: the sensor includes a microphone and an acoustic coupler.

[0009] For secure earmold placement:

[0010] As a further improvement to the above technical solution: magnetic blocks are provided on one side of the ear mold and on the inner side of the ear mold magnetic groove.

[0011] The beneficial effects of this improvement are: the magnetic block is used for magnetic fixation between the ear mold and the magnetic groove of the ear mold.

[0012] In order to transmit the detection signal to the listening device:

[0013] As a further improvement to the above technical solution: a wireless communication module is installed on the top of the test bench.

[0014] The beneficial effects of this improvement are: the wireless communication module is used to transmit the sensor's detection signal to the listening device outside the acoustic test room via wireless signal.

[0015] As a further improvement to the above technical solution: hearing protectors are worn on the outside of the adjustable human head-shaped model.

[0016] To improve the reliability of the gas pipeline:

[0017] As a further improvement to the above technical solution: the bottom of the airbag is connected to the first air supply pipe, the air inlet and outlet of the air pump are connected to the second air supply pipe, and the second air supply pipe and the first air supply pipe are connected by a rotary joint.

[0018] The beneficial effects of this improvement are as follows: the airbag and the air pump are connected by the first air supply pipe and the second air supply pipe to transport airflow. Due to the installation of the rotary joint, cracks in the air supply pipe caused by the long-term rotation of the human head model can be avoided.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0021] Figure 2 This is a top-view schematic diagram of the present invention;

[0022] Figure 3 This is a front sectional view of the present invention;

[0023] Figure 4 This is a top sectional view of the adjustable human head model in this utility model;

[0024] In the diagram: 1. Test stand; 2. Hollow rotating shaft; 3. Adjustable human head-shaped model; 4. Inner silicone filler; 5. Airbag; 6. Outer silicone layer; 7. Ear mold magnetic slot; 8. Ear mold; 9. Magnetic block; 10. Silicone simulated ear canal; 11. Sensor; 12. First air supply pipe; 13. Air pump; 14. First pulley; 15. Second pulley; 16. Belt; 17. Motor; 18. Second air supply pipe; 19. Rotary joint; 20. Wireless communication module; 21. Hearing protector. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0026] like Figure 1-4As shown, a hearing protector testing device includes a testing platform 1. A through hole extends between the top and bottom of the testing platform 1. A hollow rotating shaft 2 is rotatably mounted inside the through hole. An adjustable human head-shaped model 3 is provided on the top of the hollow rotating shaft 2. The adjustable human head-shaped model 3 includes an inner silicone filler 4 connected to the top of the hollow rotating shaft 2. An air bladder 5 is provided on the outside of the inner silicone filler 4. An outer silicone layer 6 is provided on the outside of the air bladder 5. Concave earmold magnetic grooves 7 are provided on both sides of the outer silicone layer 6. The ear mold 8 is provided on the inner side of the magnetic suction groove 7. A silicone simulated ear canal 10 is connected between the inner side of the magnetic suction groove 7 and the inner silicone filler 4. A sensor 11 is installed at the end of the silicone simulated ear canal 10 inside the inner silicone filler 4. An air pump 13 and a motor 17 are installed at the bottom of the test platform 1. A first pulley 14 is fixedly sleeved on the outer side of the hollow rotating shaft 2. The output end of the motor 17 is connected to a second pulley 15. A belt 16 is connected between the first pulley 14 and the second pulley 15.

[0027] When using this device, the earmold 8 can be replaced. Since the earmold 8 and the earmold magnetic groove 7 are magnetically connected by the magnetic block 9, the earmold 8 can be directly removed and replaced with an earmold 8 of a different ear size. The new earmold 8 is directly inserted into the earmold magnetic groove 7 and magnetically attracted by the magnetic block 9. By quickly replacing different earmolds 8, the simulation testing needs of ears of different sizes and shapes can be met. At the same time, this device can also adjust the cross-sectional perimeter of the adjustable human head model 3 to meet the simulation testing needs of different head circumferences. When adjusting the adjustable human head model 3, the air pump 13 can be controlled to inflate and deflate the airbag 5 through the second air supply pipe 18 and the first air supply pipe 12. The expansion or contraction of the airbag 5 drives the outer silicone layer 6, which has deformation and extensibility, to expand or contract. At the same time, the silicone simulated ear canal 10 can also stretch or contract with the change of the outer silicone layer 6, thereby changing the cross-sectional perimeter of the adjustable human head model 3 to meet the simulation testing needs of different head circumferences.

[0028] The adjustable head-shaped model 3 of this device can rotate. It only requires controlling the motor 17 to drive the second pulley 15 to rotate. The second pulley 15 drives the first pulley 14 and the hollow shaft 2 to rotate through the belt 16, thereby driving the adjustable head-shaped model 3 and the hearing protector 21 on the outside of the adjustable head-shaped model 3 to rotate. This better simulates the user's head rotation when using the hearing protector 21 in daily life and improves the test results.

[0029] The sensor 11 includes a microphone and an acoustic coupler.

[0030] Magnetic blocks 9 are provided on one side of the ear mold 8 and on the inner side of the ear mold magnetic groove 7.

[0031] The magnetic block 9 is used for magnetic fixation between the ear mold 8 and the ear mold magnetic groove 7.

[0032] A wireless communication module 20 is installed on the top of the test bench 1.

[0033] The wireless communication module 20 is used to transmit the detection signal of the sensor 11 to the listening device outside the acoustic test room via wireless signal.

[0034] The adjustable human head-shaped model 3 is fitted with a hearing protector 21 on its outer side.

[0035] The bottom of the airbag 5 is connected to the first air supply pipe 12, and the air inlet and outlet of the air pump 13 are connected to the second air supply pipe 18. The second air supply pipe 18 and the first air supply pipe 12 are connected by a rotary joint 19.

[0036] The airbag 5 and the air pump 13 are connected by the first air supply pipe 12 and the second air supply pipe 18 to transport air. Because a rotary joint 19 is provided, cracks in the air supply pipe can be avoided due to the long-term rotation of the human head model 3.

[0037] The working principle and usage of this utility model are as follows: This device is installed in an acoustic laboratory. During use, the earmold 8 can be replaced. Since the earmold 8 and the earmold magnetic groove 7 are magnetically connected via magnetic blocks 9, the earmold 8 can be directly removed and replaced with earmolds of different sizes. The new earmold 8 is simply inserted into the earmold magnetic groove 7 and magnetically attracted by the magnetic blocks 9. This rapid replacement of different earmolds 8 meets the simulation testing needs of ears of different sizes and shapes. Simultaneously, this device can also adjust the cross-sectional perimeter of the adjustable human head model 3 to meet the simulation testing needs of different head circumferences. When adjusting the adjustable human head model 3, the air pump 13 can be controlled to inflate and deflate the airbag 5 through the second air supply pipe 18 and the first air supply pipe 12. The expansion or contraction of the airbag 5 causes the outer silicone layer 6, which has deformation and extensibility, to expand or contract. Simultaneously, the silicone simulated ear canal 10 can also stretch or contract with the change in the outer silicone layer 6. The adjustable head-shaped model 3 is contracted to change its cross-sectional perimeter, meeting the simulation test requirements for different head circumferences. After adjustment, the hearing protector 21 can be worn on the outside of the adjustable head-shaped model 3. When wearing it, the earcups of the hearing protector 21 cover the earmold 8, and the sound system in the acoustic test chamber is turned on to play noise. The sensor 11 picks up and analyzes the noise transmitted through the hearing protector 21, such as the noise inside the silicone simulated ear canal 10, and transmits the detection signal to the outside through the wireless communication module 20. During the test, the adjustable head-shaped model 3 of this device can rotate. It is only necessary to control the motor 17 to drive the second pulley 15 to rotate. The second pulley 15 drives the first pulley 14 and the hollow shaft 2 to rotate through the belt 16, thereby driving the adjustable head-shaped model 3 and the hearing protector 21 on the outside of the adjustable head-shaped model 3 to rotate, thereby better simulating the user's head rotation during daily use of the hearing protector 21 and improving the test results.

[0038] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0039] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A hearing protection testing device, characterized in that: The test platform (1) includes a through hole between its top and bottom. A hollow rotating shaft (2) is rotatably mounted inside the through hole. An adjustable human head model (3) is provided on the top of the hollow rotating shaft (2). The adjustable human head model (3) includes an inner silicone filler (4) connected to the top of the hollow rotating shaft (2). An airbag (5) is provided on the outside of the inner silicone filler (4). An outer silicone layer (6) is provided on the outside of the airbag (5). Concave ear mold magnetic grooves (7) are provided on both sides of the outer silicone layer (6). An ear mold (8) is provided on the inner side. A silicone simulated ear canal (10) is connected between the inner side of the ear mold magnetic groove (7) and the inner silicone filler (4). A sensor (11) is installed at the end of the silicone simulated ear canal (10) inside the inner silicone filler (4). An air pump (13) and a motor (17) are installed at the bottom of the test platform (1). A first pulley (14) is fixedly sleeved on the outer side of the hollow rotating shaft (2). The output end of the motor (17) is connected to a second pulley (15). A belt (16) is connected between the first pulley (14) and the second pulley (15).

2. The hearing aid testing device according to claim 1, characterized in that: The sensor (11) includes a microphone and an acoustic coupler.

3. The hearing aid testing device according to claim 1, characterized in that: Magnetic blocks (9) are provided on one side of the ear mold (8) and on the inner side of the ear mold magnetic groove (7).

4. The hearing aid testing device according to claim 1, characterized in that: A wireless communication module (20) is installed on the top of the test bench (1).

5. The hearing aid testing device according to claim 1, characterized in that: The adjustable human head model (3) is fitted with hearing protectors (21) on its outer side.

6. The hearing aid testing device according to claim 1, characterized in that: The bottom of the airbag (5) is connected to the first air supply pipe (12), and the air inlet and outlet of the air pump (13) are connected to the second air supply pipe (18). The second air supply pipe (18) and the first air supply pipe (12) are connected by a rotary joint (19).

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