CN215956630U - Movable listening device with noise reduction function - Google Patents
Movable listening device with noise reduction function Download PDFInfo
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- CN215956630U CN215956630U CN202122558650.6U CN202122558650U CN215956630U CN 215956630 U CN215956630 U CN 215956630U CN 202122558650 U CN202122558650 U CN 202122558650U CN 215956630 U CN215956630 U CN 215956630U
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Abstract
The utility model discloses a movable audiometric device with a noise reduction function, which comprises a movable audiometric room, an audiometric mechanism and an active noise reduction mechanism, wherein the audiometric mechanism comprises sound insulation earmuffs, a display and a host, the host is arranged outside the audiometric room and is arranged on the outer wall of the audiometric room, the sound insulation earmuffs and the display are arranged inside the audiometric room and are electrically connected with the host, and the active noise reduction mechanism is arranged on the outer wall of the sound insulation earmuffs and is electrically connected with the host and is configured to reduce the noise of the environment; the audiometric room is a sound insulation space with a fixed volume. The movable listening device is provided with a plurality of physical noise reduction components, so that the noise reduction effect is good; still be provided with the initiative and fall the mechanism of making an uproar, can be used to survey the environmental sound pressure frequency response characteristic of sound insulation earmuff, realize falling the noise of the outer environmental noise of sound insulation earmuff. The device can automatically realize noise reduction according to the surrounding environment, improve the accuracy and reliability of hearing tests and ensure that the test process is not influenced by environmental changes.
Description
Technical Field
The utility model relates to the field of audiometric equipment, in particular to a movable audiometric device with a noise reduction function.
Background
With the progress of aging society and the promotion of popularization and application of electroacoustic, more and more sounds are generated, and more people with hearing loss are generated.
The ears of people are not easy to perceive at the initial stage of hearing loss, and can be found only through audiological detection of medical institutions, so that many people feel inconvenient and do not want to check the hearing, and only the people select to go to the hospital to the extent of seriously influencing the life, and the people are late. Then, popular hearing monitoring in a general environment is one direction, but is greatly affected by a change in environmental noise pressure.
Currently, the audiometry mode is mainly divided into an online audiometry mode and an offline audiometry mode, wherein the online audiometry is carried out by an audiometer on a network through equipment such as a mobile phone or a computer, but the audiometry mode is limited by factors such as environmental influence, earphone quality influence, mobile phone system inconsistency and the like, and the audiometry environment has large change, low audiometry reliability and large error;
off-line audiometry is that the audiometer goes to medical institution or special audiometry store and goes on, and the main mode of audiometry is that the audiometer stays to go on in the sound-proof room, but current big sound-proof room though can fall make an uproar and noise reduction is good, but the big suitable local installation of being difficult for finding of volume, and little sound-proof room noise reduction is poor, influences the reliability of audiometry result.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a movable hearing test device with a noise reduction function, which can reduce noise, improve the accuracy and reliability of hearing test, ensure that the test process is not influenced by environmental change and at least solve one of the problems.
According to one aspect of the utility model, a movable audiometry device with a noise reduction function is provided, which comprises a movable audiometry room, an audiometry mechanism and an active noise reduction mechanism, wherein the audiometry mechanism comprises sound insulation earmuffs, a display, a host and audiometry earphones, the host is arranged outside the audiometry room and arranged on the outer wall of the audiometry room, the display is arranged in the audiometry room and electrically connected with the host, the sound insulation earmuffs are arranged in the audiometry room, the audiometry earphones are embedded in the inner side of a shell of the sound insulation earmuffs and connected with the display, and the active noise reduction mechanism is arranged on the outer wall of the sound insulation earmuffs and electrically connected with the host and is configured to reduce the noise of the environment;
the audiometric room is a sound insulation space with a fixed volume.
Therefore, the utility model provides a movable listening device with a brand new structure and a noise reduction function, which is provided with a plurality of physical noise reduction components: the personal audiometric room with fixed volume can reduce noise of the body environment of the testee, and the movable audiometric room is convenient to move and can isolate ground vibration noise; when audiometry is carried out, an audiometry earphone is worn, and sound insulation earmuffs covering the periphery of the audiometry earphone can reduce noise of ears; more importantly, still be provided with the initiative and fall the mechanism of making an uproar, can be used to survey the environmental sound pressure frequency response characteristic of sound insulation earmuff, because the audiometry room space volume that the microphone was located is unchangeable, the initiative falls the mechanism of making an uproar and can handle and restrain the volumetric acoustic pressure in fixed space, realizes falling the noise of the environmental noise outside the sound insulation earmuff. The movable hearing test device with the noise reduction function can automatically reduce noise according to the surrounding environment, improve the accuracy and reliability of hearing tests and ensure that the test process is not influenced by environmental changes.
In some embodiments, the active noise reduction mechanism includes a microphone, an inverse loudspeaker and an SOC noise reduction processor, the SOC noise reduction processor is installed on the outer wall of the sound insulation earmuff and electrically connected to the host, the microphone, the inverse loudspeaker and the SOC noise reduction processor are electrically connected, the microphone is disposed on the outer side of the outer wall of the sound insulation earmuff, the sound inlet hole points to the outer side of the sound insulation earmuff, the inverse loudspeaker is disposed in the audiometric chamber, and the sound outlet hole points to the sound insulation earmuff. Therefore, the working principle of the active noise reduction mechanism is as follows: the microphone picks up the sound signal outside the sound insulation earmuff, then transmits to SOC noise reduction processor and carries out initiative noise reduction processing, carries out corresponding adjustment to the sound signal that the microphone picked up, then exports reverse loudspeaker, sends the sound wave with the sound signal opposite phase place that the microphone picked up through reverse loudspeaker, and then suppresses the noise sound pressure around the sound insulation earmuff.
In some embodiments, the audiometric headset may be controlled by a computer to emit a test tone, and the host computer is connected to the computer. Therefore, the host can control the SOC noise reduction processor according to the frequency range of the audiometric item; or sending an instruction to the SOC noise reduction processor, and calculating the noise reduction depth of the SOC noise reduction processor according to the sound pressure frequency spectrum; the data of the host computer is displayed through the display, and the display can display audiometric data and environmental sound pressure data on the same screen so that a tester can judge whether the test sound is interfered by environmental noise in the audiometric process.
In some embodiments, the active noise reduction mechanism further comprises a housing mounted to an outer wall of the sound-insulating earmuff, and the SOC noise reduction processor is mounted within the housing. Therefore, the SOC noise reduction processor can be protected, and meanwhile, the SOC noise reduction processor is convenient to install.
In some embodiments, the SOC noise reduction processor is electrically connected to the host through a data line.
In some embodiments, the audiometric room comprises an audiometric room body and a door body rotatably mounted in front of the audiometric room body, wherein the edge of the door body is in sealing fit with the audiometric room body, and a completely sealed space is formed when the door body and the audiometric room body are completely closed. Therefore, the sound insulation board is convenient to use and good in sound insulation.
In some embodiments, the door body is provided with a transparent soundproof glass panel, and an edge of the soundproof glass panel is hermetically connected with an opening edge of the door body. Therefore, the soundproof glass panel is a transparent panel, can effectively insulate sound, is convenient for observing the conditions in the audiometric room, and is attractive and practical.
In some embodiments, the audiometric room body comprises a wall body, a top plate and a bottom plate, the wall body encloses a fixed-size audiometric space, the top plate is arranged at the top of the wall body, the bottom plate is arranged at the bottom of the wall body, the wall body comprises at least one layer of polyester fiber board and at least one layer of soundproof cotton, and the soundproof cotton is clamped on the polyester fiber board. Therefore, the sound absorption and insulation effect is good, and the sound absorption and insulation device is very used for items such as hearing detection.
In some embodiments, the wall of the audiometric room body further comprises a decorative layer, and the decorative layer is arranged on the surface of the outermost polyester fiber board. From this, the setting of decorative layer makes the wall body that gives sound insulation more pleasing to the eye.
In some embodiments, the bottom of the floor of the audiometric cell body is provided with a plurality of spring-damped wheels. Therefore, the arrangement of the spring damping wheels can isolate ground vibration noise besides enabling the audiometric room to be convenient to move.
In some embodiments, the audiometric room body is a cube, and the spring damping wheels are installed at four corners of the bottom plate of the audiometric room body. Therefore, the direct contact between the audiometric room and the ground can be effectively prevented from generating resonance, and the sound insulation performance is improved.
The utility model has the beneficial effects that:
the utility model provides a movable audiometric device with a brand new structure and a noise reduction function, wherein the audiometric system is provided with a plurality of physical noise reduction components: the personal audiometric room with fixed volume can reduce noise of the body environment of a subject, and the spring shock absorption wheel can isolate ground vibration noise besides the function of convenient movement; the sound insulation earmuffs are used for reducing noise of ears; more importantly, the active noise reduction mechanism is also arranged and can be used for detecting the environmental sound pressure frequency response characteristics of the sound insulation earmuffs, and because the space volume of the audiometric room where the microphone is positioned is unchanged, the interference of external sound to the audiometric room is always limited, so that the sound pressure with fixed space volume can be processed and suppressed by using the noise reduction SOC and the anti-phase loudspeaker;
the movable audiometry device with the noise reduction function mainly solves the problems of noise, accuracy and reliability of hearing test, takes an audiometry room with a fixed space and a certain sound insulation effect as a noise reduction main body, is additionally provided with an active noise reduction mechanism inside, carries out active noise reduction treatment while carrying out physical noise reduction on environmental noise entering the audiometry room, monitors the noise and audiometry states in real time by utilizing an intelligent algorithm in the main body, and adjusts noise reduction strategies and depths in real time, so that the test is not influenced by environmental changes.
Drawings
Fig. 1 is a schematic perspective view of a mobile listening device with a noise reduction function according to an embodiment of the present invention;
fig. 2 is a simplified structural diagram illustrating an installation of an indoor part of a mobile audiometric device with a noise reduction function according to an embodiment of the present invention;
fig. 3 is a simplified structural schematic diagram of a sound-insulating earmuff of the movable sound-measuring device with noise reduction function shown in fig. 2;
fig. 4 is a simplified flowchart of a mobile listening device with noise reduction function according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a wall of an audiometric room of the movable audiometric device having a noise reduction function shown in fig. 1.
Reference numerals in FIGS. 1 to 5: 1-a portable audiometric room; 2-audiometry mechanism; 3-an active noise reduction mechanism; 4-a computer; 11-audiometric room body; 12-a door body; 13-spring damper wheels; 21-sound insulation earmuffs; 22-a display; 23-a host; 24-audiometric headphones; 25-data lines; 31-a microphone; 32-an inverted horn; 33-SOC noise reduction processor; 34-a housing; 111-a wall; 112-a top plate; 113-a backplane; 121-sound insulating glass panels; 111 a-polyester fiber board; 111 b-soundproof cotton; 111c — decorative layer.
Detailed Description
The present invention is described in further detail below with reference to the specific drawings.
Fig. 1 to 5 schematically show a movable listening device with a noise reduction function according to an embodiment of the present invention.
As shown in fig. 1 to 4, the movable audiometric device with noise reduction function includes a movable audiometric room 1, an audiometric mechanism 2, and an active noise reduction mechanism 3. The audiometry mechanism 2 comprises sound insulation earmuffs 21, a display 22, a host 23 and audiometry earphones 24, the host 23 is arranged outside the audiometry room 1 and is arranged on the outer wall of the audiometry room 1, the display 22 is arranged in the audiometry room 1 and is electrically connected with the host 23, the sound insulation earmuffs 21 are arranged in the audiometry room 1, the audiometry earphones 24 are embedded and arranged on the inner side of a shell of the sound insulation earmuffs 21 and are connected with the display 22, and the active noise reduction mechanism 3 is arranged on the outer wall of the sound insulation earmuffs 21 and is electrically connected with the host 23 and is configured to reduce the noise of the ambient noise;
the active noise reduction mechanism 3 of the present embodiment includes a microphone 31, an inverter horn 32, and an SOC noise reduction processor 33.
The SOC noise reduction processor 33 is arranged on the outer wall of the sound insulation earmuff 21 and is electrically connected with the host 23;
the microphone 31 and the inverse speaker 32 are electrically connected with the SOC noise reduction processor 33;
the audiometric room 11 is also provided with an audiometric device for audiometry and a computer 4, and the audiometric device at least comprises an audiometric earphone 24 for sending out test sound, and may further comprise an audiometer and the like.
The display 22 can be connected with audiometric equipment controlled by the computer 4 and displays the sound pressure frequency spectrum collected by the microphone 31 after being powered on;
the host 23 is connected with the computer 4, and can control the SOC noise reduction processor 33 according to the frequency range of the audiometric item;
the host 23 may issue an instruction to the SOC noise reduction processor 33, and calculate the noise reduction depth of the SOC noise reduction processor 33 according to the sound pressure spectrum;
the data of the host 23 is displayed by the display 22, and the display 22 can display audiometric data and environmental sound pressure data on the same screen so that a tester can judge whether the test sound is interfered by environmental noise in the audiometric process;
the microphone 31 is arranged on the outer side of the outer wall of the sound insulation earmuff 21, and the sound inlet hole points to the outer side of the sound insulation earmuff 21;
the anti-phase loudspeaker 32 is arranged in the audiometric room 11, and the sound outlet points to the sound insulation earmuff 21;
the audiometric room 1 is a sound insulation space with a fixed volume and can only accommodate one person;
the bottom of the audiometric room 1 is provided with a plurality of spring damper wheels 13.
The microphone 31 of the present embodiment may be a device that can collect sound like a microphone; the inverter horn 32 may be a device that can output sound like a horn; the host 23 may be a computer and may be fixedly mounted on the outer wall of the audiometric room 1 through a telescopic arm, a mounting frame and other structures.
Therefore, the utility model provides a movable audiometric device with a brand-new structure and a noise reduction function, wherein the audiometric system is provided with a plurality of physical noise reduction components: the personal audiometric room 1 with fixed volume can reduce noise of the body environment of a subject, and the spring shock absorption wheels 13 can isolate ground vibration noise besides the function of convenient movement; when audiometry is carried out, an audiometry earphone 24 is worn, and the sound insulation earmuffs 21 covering the periphery of the audiometry earphone 24 can reduce noise of ears; more importantly, an active noise reduction mechanism 3 is further arranged and can be used for detecting the ambient sound pressure frequency response characteristics of the sound insulation earmuff 21, and since the spatial volume of the audiometric room 1 where the microphone 31 is located is unchanged, the interference of external sound to the inside of the audiometric room 1 is always limited, so that the noise reduction SOC and the anti-phase loudspeaker 32 can be used for processing and suppressing the sound pressure with fixed spatial volume. The movable hearing test device with the noise reduction function can automatically reduce noise according to the surrounding environment, improve the accuracy and reliability of hearing tests and ensure that the test process is not influenced by environmental changes.
The active noise reduction mechanism 3 further includes a housing 34 and a data line 35. A shell 34 is arranged on the outer wall of the sound insulation earmuff 21, and the SOC noise reduction processor 33 is arranged in the shell 34. Thus, the SOC noise reduction processor 33 can be protected while facilitating installation.
The SOC noise reduction processor 33 may be electrically connected to the host 23 via a data line 35.
The audiometric room 1 can perform physical noise reduction on the environmental sound pressure, and the host 23 can calculate the noise reduction power according to the space volume of the audiometric room 1; the host 23 can calculate the noise reduction bandwidth and the noise reduction depth of the SOC noise reduction processor 33 according to the sound pressure state in the audiometric room 1 collected by the microphone 31;
the noise reduction depth value of the SOC noise reduction processor 33 can be set in the host 23, so that the anti-phase sound of the anti-phase loudspeaker 32 is limited not to exceed a limit value;
the output sound pressure of the inverse speaker 32 is limited to be lower than the allowable environmental sound pressure during audiometry, so that the inverse sound is prevented from becoming new noise to interfere the audiometry, namely the output sound pressure of the inverse speaker 32 is limited to not exceed the allowable environmental sound pressure during audiometry;
the sound pressure value after the noise reduction of the audiometric room 1 and the active noise reduction of the active noise reduction mechanism 3 in the embodiment does not exceed the allowable environment sound pressure during audiometry.
Therefore, new noise which is formed by overlarge reverse sound and can interfere with the test can be effectively avoided, and the audiometry process is ensured to be smoothly carried out.
The SOC noise reduction processor 33 of the present embodiment is a commonly-used SOC noise reduction chip on which an active noise reduction module of a filter circuit is integrated. The SOC noise reduction processor 33 can adjust the sound signal picked up by the microphone 31 accordingly, and then output the sound signal to the phase-inverting speaker 32, and the phase-inverting speaker 32 emits sound waves with a phase opposite to that of the sound signal picked up by the microphone 31, so as to suppress the noise sound pressure around the sound-insulating earmuff 21.
Further, the SOC noise reduction processor 33 of the present invention may further include a signal amplifier, the active noise reduction module may adopt a combination of a second order filter and an inverting amplifier, and the specific active noise reduction principle may be as follows: the microphone 31 transmits the picked-up external sound signal to a signal amplifier for signal amplification processing, then the signal is subjected to phase adjustment through a second-order filter of the noise reduction module, and then the sound signal is subjected to phase inversion processing through an inverting amplifier and then is output through an inverting horn 32.
The audiometric room 1 comprises an audiometric room body 11 and a door body 12 rotatably installed in front of the audiometric room body 11, the edge of the door body 12 is in sealing fit with the audiometric room body 11, when the door body 12 and the audiometric room body 11 are completely closed, a completely closed space is formed, a transparent sound insulation glass panel 121 is arranged on the door body 12, and the edge of the sound insulation glass panel 121 is in sealing connection with the opening edge of the door body 12. Therefore, the soundproof glass panel 121 is a transparent panel, can effectively insulate sound, is convenient for observing the conditions in the audiometric room 1, and is beautiful and practical.
As shown in fig. 1, the audiometric room body 11 includes a wall 111, a ceiling 112, and a floor 113. The wall 111 encloses a listening space with a fixed size, the top plate 112 is arranged at the top of the wall 111, and the bottom plate 113 is arranged at the bottom of the wall 111.
As shown in fig. 5, the wall 111 includes at least one polyester fiber plate 111a and at least one layer of soundproof cotton 111b, and the soundproof cotton 111b is sandwiched between the polyester fiber plate 111 a. Therefore, the sound absorption and insulation effect is good, and the sound absorption and insulation device is very used for items such as hearing detection.
The wall 111 of the audiometric room body 11 further includes a decoration layer 111c, and the decoration layer 111c is disposed on the surface of the outermost polyester fiber board 111 a. Thus, the sound insulation wall 111 is more beautiful due to the decorative layer 111 c.
The bottom of the audiometric room 1 is provided with a plurality of spring damper wheels 13. Thus, the spring damper wheel 13 is provided to isolate ground vibration noise in addition to allowing the audiometric room 1 to be easily moved.
The audiometric room body 11 is a square body, and the spring damping wheels 13 are installed at four corners of the bottom plate 113 of the audiometric room body 11. Therefore, the audiometric room 1 can be effectively prevented from directly contacting with the ground to generate resonance, and the sound insulation performance is improved.
The working principle of the movable listening device with the noise reduction function is as follows:
the experimenter gets into the audiometry room 1, wears sound proof earmuff 21 back, and microphone 31 sound inlet is directional sound proof earmuff 21 outside and opposite with experimenter ear direction, and the sound outlet of opposition loudspeaker 32 then is facing to the ear, and staff or medical personnel open the audiometry through operation host 23, and experimenter accessible display 22 sees the audiometry project content and makes corresponding response. Because individual audiometry room 1 area is little and the bottom is provided with spring shock attenuation wheel 13, can conveniently remove, when removing different positions, the microphone 31 detects and reaches the sound pressure frequency response characteristic and can change, because, the space volume that microphone 31 was located is unchangeable, and the interference of external sound in audiometry room 1 is always limited. This allows the sound pressure of the fixed spatial volume to be processed and suppressed by the noise reduction SOC and the inverter horn 32.
The noise reduction SOC may adjust a signal output to the phase-inverting speaker 32 according to data recorded by the microphone 31, and emit a sound wave having a phase opposite to that of the sound recorded by the microphone 31 through the phase-inverting speaker 32 to suppress noise sound pressure around the ear cup of the headphone.
When the external sound pressure is too high, the host 23 prompts to be too loud to stop listening. The function can be used for observing whether the audiometric environment meets the test requirement or not, and invalid work is avoided.
The utility model provides a movable audiometric device with a brand new structure and a noise reduction function, wherein the audiometric system is provided with a plurality of physical noise reduction components: the personal audiometric room 1 with a fixed volume can reduce noise of the body environment of a subject, and the spring shock absorption wheels 13 can isolate ground vibration noise besides the function of convenient movement; the sound insulation earmuffs 21 are used for reducing noise of the ears; more importantly, the active noise reduction mechanism 3 is also arranged and can be used for detecting the environmental sound pressure frequency response characteristics of the sound insulation earmuff 21, and because the space volume of the audiometric room 1 where the microphone 31 is positioned is unchanged, the interference of external sound to the audiometric room 1 is always limited, so that the sound pressure of a fixed space volume can be processed and suppressed by using the noise reduction SOC and the inverted speaker 32;
the movable audiometry device with the noise reduction function mainly solves the problems of noise, accuracy and reliability of hearing test, takes an audiometry room 1 with a fixed space and a certain sound insulation effect as a noise reduction main body, is additionally provided with an active noise reduction mechanism 3, carries out active noise reduction treatment while carrying out physical noise reduction on environmental noise entering the audiometry room 1, monitors noise and audiometry state in real time by utilizing an intelligent algorithm in a host 23, and adjusts noise reduction strategies and depths in real time, so that the test is not influenced by environmental change.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.
Claims (10)
1. The movable audiometry device with the noise reduction function is characterized by comprising a movable audiometry room (1), an audiometry mechanism (2) and an active noise reduction mechanism (3), wherein the audiometry mechanism (2) comprises sound insulation earmuffs (21), a display (22), a host (23) and audiometry earphones (24), the host (23) is arranged outside the audiometry room (1), the display (22) is arranged in the audiometry room (1) and electrically connected with the host (23), the sound insulation earmuffs (21) are arranged in the audiometry room (1), the audiometry earphones (24) are embedded and arranged on the inner side of a shell of the sound insulation earmuffs (21) and connected with the display (22), the active noise reduction mechanism (3) is arranged on the outer wall of the sound insulation earmuffs (21) and electrically connected with the host (23) and configured to reduce noise of ambient noise;
the audiometric room (1) is a sound insulation space with a fixed volume.
2. The movable listening device with noise reduction function according to claim 1, wherein the active noise reduction mechanism (3) comprises a microphone (31), an inverse speaker (32) and an SOC noise reduction processor (33), the SOC noise reduction processor (33) is installed on the outer wall of the sound insulation earmuff (21) and electrically connected to the host (23), the microphone (31), the inverse speaker (32) and the SOC noise reduction processor (33) are electrically connected, the microphone (31) is installed on the outer wall of the sound insulation earmuff (21) with the sound inlet pointing to the outside of the sound insulation earmuff (21), the inverse speaker (32) is installed in the listening room (1) with the sound outlet pointing to the sound insulation earmuff (21).
3. The device according to claim 2, wherein the audiometric earphone (24) is controlled by the computer (4) to emit a test tone, and the host computer (23) is connected to the computer (4).
4. A movable listening device with noise reduction according to claim 2 wherein the active noise reduction mechanism (3) further comprises a housing (34), the housing (34) being mounted to the outer wall of the sound-proof ear muff (21), the SOC noise reduction processor (33) being mounted in the housing (34).
5. The device according to claim 4, wherein the SOC noise reduction processor (33) is electrically connected to the host computer (23) via a data line (25).
6. The movable audiometric device with the noise reduction function according to any one of claims 1 to 5, wherein the audiometric room (1) comprises an audiometric room body (11) and a door body (12) rotatably mounted in front of the audiometric room body (11), an edge of the door body (12) is in sealing fit with the audiometric room body (11), and a completely sealed space is formed when the door body (12) and the audiometric room body (11) are completely closed.
7. The movable acoustic listening device with a noise reduction function according to claim 6, wherein a transparent soundproof glass panel (121) is provided on the door body (12), and an edge of the soundproof glass panel (121) is hermetically connected to an opening edge of the door body (12).
8. The movable listening device with the noise reduction function according to claim 6, wherein the listening room body (11) comprises a wall body (111), a top plate (112) and a bottom plate (113), the wall body (111) encloses a listening space with a fixed size, the top plate (112) is disposed on the top of the wall body (111), the bottom plate (113) is disposed on the bottom of the wall body (111), the wall body (111) comprises at least one layer of polyester fiber board (111a) and at least one layer of soundproof cotton (111b), and the soundproof cotton (111b) is clamped on the polyester fiber board (111 a).
9. The movable audiometric device with noise reduction function according to claim 8, wherein the wall body (111) of the audiometric room body (11) further comprises a decorative layer (111c), and the decorative layer (111c) is disposed on the surface of the outermost polyester fiber board (111 a).
10. The movable audiometric device with noise reduction function according to claim 8, wherein a plurality of spring shock absorbing wheels (13) are provided at a bottom of a bottom plate (113) of the audiometric room body (11).
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| CN202122558650.6U CN215956630U (en) | 2021-10-22 | 2021-10-22 | Movable listening device with noise reduction function |
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| CN202122558650.6U CN215956630U (en) | 2021-10-22 | 2021-10-22 | Movable listening device with noise reduction function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822469A (en) * | 2021-10-22 | 2022-07-29 | 佛山博智医疗科技有限公司 | Audiometry system with intelligent noise reduction function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114822469A (en) * | 2021-10-22 | 2022-07-29 | 佛山博智医疗科技有限公司 | Audiometry system with intelligent noise reduction function |
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