CN114900765A - Audiometric earphone with intelligent noise reduction function - Google Patents
Audiometric earphone with intelligent noise reduction function Download PDFInfo
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- CN114900765A CN114900765A CN202111237647.2A CN202111237647A CN114900765A CN 114900765 A CN114900765 A CN 114900765A CN 202111237647 A CN202111237647 A CN 202111237647A CN 114900765 A CN114900765 A CN 114900765A
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- 238000009413 insulation Methods 0.000 claims abstract description 65
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
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- 230000007613 environmental effect Effects 0.000 claims abstract description 12
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- 238000012360 testing method Methods 0.000 claims description 31
- 230000006870 function Effects 0.000 claims description 24
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- 238000006243 chemical reaction Methods 0.000 claims description 10
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- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000005236 sound signal Effects 0.000 claims description 5
- 206010052137 Ear discomfort Diseases 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 210000005069 ears Anatomy 0.000 claims description 2
- 238000012076 audiometry Methods 0.000 abstract description 12
- 206010011878 Deafness Diseases 0.000 description 5
- 208000016354 hearing loss disease Diseases 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 231100000888 hearing loss Toxicity 0.000 description 4
- 230000010370 hearing loss Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
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Abstract
The invention discloses an audiometric earphone with an intelligent noise reduction function, which can be connected with audiometric equipment controlled by a computer, wherein the audiometric earphone comprises a sound insulation earmuff, a sound production device arranged on the sound insulation earmuff, a sound pressure monitoring noise reduction device and a control device; the sound pressure monitoring and noise reducing device comprises an SMC processor, a first microphone, a second microphone and an inverse horn; the sound insulation earmuff comprises an inner sound insulation wall, an outer sound insulation wall and a sealing element, wherein a sound production device and a second microphone are installed on the inner wall of the inner sound insulation wall, the outer sound insulation wall is covered on the outer wall of the inner sound insulation wall, a cavity is formed between the periphery of the inner sound insulation wall and the outer sound insulation wall, a reverse-phase loudspeaker is installed in the cavity, interference sound caused by the reverse loudspeaker is avoided, a first microphone is installed on the outer wall of the outer sound insulation wall, and the sealing element is arranged at the end part of the inner sound insulation wall and the end part of the outer sound insulation wall and can be locked on the periphery of a ear. The audiometric earphone can effectively isolate environmental noise and self-noise; noise reduction and audiometry can be performed in a common environment, and new noise is not formed by the noise reduction sound in the opposite phase.
Description
Technical Field
The invention relates to the field of audiometric equipment, in particular to an audiometric earphone with an intelligent noise reduction function.
Background
Hearing loss is common, more and more hearing loss people are in the mouth along with the progress of aging society, and hearing loss interference delay can cause deafness and hearing disability. Then, it is becoming increasingly important to find hearing loss. Generally, the hearing examination needs to be carried out in a sound insulation environment to avoid the influence of environmental noise on audiometric signals, and the audiometric signals need to be carried out in a hospital, and the hospital has a sound insulation chamber matched with the hearing examination, but many people are in trouble and do not want to go to the hospital. Some ANC active noise reduction devices are also arranged on the market, an ANC noise reduction system and an audiometric earphone are integrated into a whole, but the problem that the noise reduction depth is too large, so that the noise-reduced reverse sound becomes new noise and the like can occur in the mode.
Disclosure of Invention
The invention aims to provide an audiometric earphone with an intelligent noise reduction function, which solves the problem that the hearing examination is interfered by noise and can effectively isolate environmental noise and self-body noise; the audiometric earphone can be used for noise reduction and audiometry in a common environment, and new noise cannot be formed by noise reduction in opposite phase, so that at least one of the problems can be solved.
According to one aspect of the invention, the audiometric earphone with the intelligent noise reduction function is provided, and can be connected with audiometric equipment controlled by a computer, and comprises sound insulation earmuffs, sound production devices arranged on the sound insulation earmuffs, a sound pressure monitoring noise reduction device and a control device;
the sound pressure monitoring and noise reducing device comprises an SMC processor, a first microphone, a second microphone and an inverse horn, wherein the first microphone, the second microphone and the inverse horn are electrically connected with the SMC processor, and the SMC processor and the second microphone are electrically connected with the control device;
the sound insulation earmuffs comprise an inner sound insulation wall, an outer sound insulation wall and a sealing element, the sound production device and the second microphone are mounted on the inner wall of the inner sound insulation wall, the outer sound insulation wall is covered on the periphery of the inner sound insulation wall, a cavity is formed between the inner sound insulation wall and the outer sound insulation wall, the inverted-phase loudspeaker is mounted in the cavity, the first microphone is mounted on the outer wall of the outer sound insulation wall, and the sealing element is arranged at the end parts of the inner sound insulation wall and the outer sound insulation wall and can be buckled on the periphery of ears in a sealing manner;
the sound outlet of the sound production device points to the auditory canal and is connected with the audiometric equipment and used for producing test sound;
the sound inlet hole of the first microphone faces outwards and is used for collecting the sound pressure of the environmental noise;
the sound outlet hole of the inverse horn points to the inner sound insulation wall and is used for outputting noise reduction sound;
the sound inlet hole of the second microphone faces to the ear and is used for collecting noise sound pressure between the inner side of the inner sound insulation wall and the ear;
the control device is electrically connected with the computer and the audiometric equipment, and can receive the information of the test sound sent by the audiometric equipment and the sound pressure frequency spectrum collected by the second microphone, analyze and process the information and send a control instruction to the SMC processor; the information of the test tone includes, but is not limited to, the frequency and loudness of the test tone;
the SMC processor can receive the instruction of the control device and control the output of the inverted horn.
Therefore, the working principle of the audiometric earphone is as follows: the test subject wears the audiometric earphone, after the audiometric earphone is started, the control device transmits frequency and loudness information of a test tone of audiometric equipment in a test state to the SMC processor, the SMC processor controls the phase reversal loudspeaker to emit reverse-phase sound covering the frequency of the test tone, so that the sound pressure value of noise collected by the second microphone is lower than the sound pressure of the test tone emitted by the audiometric equipment, and if the sound pressure of the noise collected by the second microphone is higher than the sound pressure of the test tone, the control device feeds back the sound pressure to the computer to perform abnormal reminding or even alarming to prompt noise interference;
the control device can receive signals of the second microphone, the noise reduction depth of the SMC processor is calculated and controlled according to the sound pressure frequency spectrum, the SMC processor can control the phase reversal loudspeaker to emit phase reversal sound according to instructions of the control device, the cavity sound pressure of the cavity is reduced, and then the noise sound pressure on the inner side of the inner sound insulation wall is reduced.
Therefore, the control device is matched with the sound pressure monitoring noise reduction device, and the noise reduction function and the sound pressure monitoring function can be simultaneously realized;
more importantly, an inner sound-separating wall is arranged between the phase reversal loudspeaker and a sound production device which emits the test sound to be completely separated, so that the phase reversal loudspeaker and the sound production device cannot be influenced mutually, the test sound and the noise reduction sound completely and independently operate without mutual interference, and the cross influence on audiometry or noise reduction is avoided.
In conclusion, the audiometric earphone solves the problem that the hearing examination is interfered by noise, and can effectively isolate environmental noise and self-body noise; the audiometric earphone can be used for noise reduction and audiometry in a common environment, and noise reduction sound cannot form new noise.
In some embodiments, the audiometric earphone with the intelligent noise reduction function further comprises a display, and the control device and the computer are electrically connected with the display. Therefore, the sound pressure frequency spectrum states collected by the first microphone and the second microphone can be transmitted to the computer through the control device and displayed on the display in a frequency spectrum diagram mode, so that observation is facilitated; in addition, the audiometric data of the audiometric device and the sound pressure monitoring data of the control device can be displayed through the display, and the display can display the audiometric data and the environmental sound pressure data on the same screen so that a tester can judge whether the test sound is interfered by noise in the audiometric process.
In some embodiments, the control device comprises at least one electronic control switch, the electronic control switch comprises a first switch, a second switch and a third switch, the first switch is a low-pass switch set according to a hearing threshold HL of a human ear hearing dynamic range, the second switch is a high-pass switch set according to a human ear discomfort threshold UCL, and the third switch is a connecting switch between the control device and the computer; the control device can realize the control of interaction between the control device and the computer through the switch III;
when the ambient sound picked up by the first microphone is higher than the hearing threshold HL, the control device is started through a switch I and the SMC processor is used for reducing noise;
when the sound signal picked up by the second microphone exceeds the discomfort threshold UCL of the human ear, the control device is started through the second switch to send a noise reduction depth adjusting instruction, and then the SMC processor controls the maximum output sound pressure of the inverse horn to protect the hearing; meanwhile, by starting the switch III, the control device feeds back the signal to the computer to prompt noise interference.
Therefore, during audiometry, the first switch can be used for starting noise reduction and sound pressure monitoring, the second switch can be used for starting noise reduction depth adjustment and reverse loudspeaker maximum output volume adjustment, the third switch can be used for achieving interaction between the control device and a computer, and prompting or alarming of abnormal states is facilitated.
In some embodiments, a power module is integrated on the control device, the power module is electrically connected with the control device, and the SMC processor, the first microphone, the second microphone, and the inverted phase horn are all electrically connected with the power module. Therefore, the power module can supply power to each electric component.
In some embodiments, the control device is integrated with an a/D conversion module, and the a/D conversion module is electrically connected to the second microphone and the control device, respectively. Therefore, the A/D conversion module is used for converting the sound signal picked up by the second microphone into a digital signal and feeding the digital signal back to the control device.
In some embodiments, the audiometric headset further comprises a control box mounted to an outer wall of the sound-insulating earmuff, wherein the SMC processor and the control device are mounted within the control box. Therefore, the control box can protect the SMC processor, the control device and other electronic components and is convenient to install.
In some embodiments, the first microphone and the second microphone may be ANC microphones and may be at least one in number. Thus, ANC in an ANC microphone is fully merged into Active Noise Cancellation, that is, means Active Noise reduction.
In some embodiments, the sound-proof earmuff further comprises a first sound-proof layer disposed in the cavity, and the inverted-phase horn is embedded in the first sound-proof layer.
In some embodiments, the sound-insulating earmuff further comprises a second sound-insulating layer disposed on an inner side surface of the inner sound-insulating wall, and the sound-generating device is embedded in the second sound-insulating layer.
The invention has the beneficial effects that:
the invention provides an audiometric earphone with an intelligent noise reduction function and a brand new structure, in practical application, various sound production devices which can produce test sounds, such as earphones, can be placed in a sound insulation earmuff; the anti-phase loudspeaker and the sounding device which sends the test sound are completely separated by the inner sound-separating wall, so that the anti-phase loudspeaker and the sounding device cannot be influenced mutually, the test sound and the noise-reducing sound run completely independently and do not interfere with each other, and cross influence on audiometry or noise reduction is avoided.
The audiometric earphone solves the problem that the hearing examination is interfered by noise, and can effectively isolate environmental noise and self-noise; the audiometric earphone can be used for noise reduction and audiometry in a common environment, and noise reduction sound cannot form new noise.
Drawings
Fig. 1 is a schematic simplified cross-sectional structural diagram of an earphone body of an audiometric earphone with an intelligent noise reduction function according to an embodiment of the present invention;
fig. 2 is a block diagram of a simplified circuit structure of the audiometric earphone with the intelligent noise reduction function shown in fig. 1;
fig. 3 is a block diagram of a further detailed circuit structure of the audiometric earphone with the intelligent noise reduction function shown in fig. 2.
Reference numerals in FIGS. 1 to 3: 1-a computer; 2-audiometric earphone; 3-audiometric equipment; 4-a display; 21-sound insulation earmuffs; 22-a sound-producing device; 23-sound pressure monitoring noise reduction device; 24-a control device; 25-a control box; 210-a cavity; 211-inner sound-insulating wall; 212-outer sound-proof wall; 213-a seal; 214-a first acoustic barrier layer; 215-a second sound insulating layer; 231-SMC processor; 232-a first microphone; 233-a second microphone; 234-an anti-phase horn; 241-an electronic control switch; 242-a power supply module; 243-A/D conversion module; 241 a-switch one; 241 b-switch two; 241 c-switch three.
Detailed Description
The present invention is described in further detail below with reference to the specific drawings.
Fig. 1 to 3 schematically show an audiometric earphone with an intelligent noise reduction function according to an embodiment of the present invention.
As shown in fig. 1 to 3, the audiometric headset 2 may be connected to an audiometric device 3 controlled by a computer 1. Audiometric devices 3 include, but are not limited to, audiometers, electrical audiometers, and the like.
The audiometric earphone 2 comprises a sound insulation earmuff 21, a sound production device 22, a sound pressure monitoring and noise reduction device 23 and a control device 24, wherein the sound production device 22 is mounted on the sound insulation earmuff 21.
The sound pressure monitoring and noise reducing device 23 includes an SMC processor 231, a first microphone 232, a second microphone 233 and an inverse speaker 234, wherein the first microphone 232, the second microphone 233 and the inverse speaker 234 are electrically connected to the SMC processor 231, and the SMC processor 231 and the second microphone 233 are electrically connected to the control device 24.
The sound-insulating earmuff 21 comprises an inner sound-insulating wall 211, an outer sound-insulating wall 212 and a seal 213. The sound-producing device 22 and the second microphone 233 are mounted on the inner wall of the inner sound-insulating wall 211, and the outer sound-insulating wall 212 is covered on the periphery of the inner sound-insulating wall 211, and a cavity 210 is formed between the two. The phase-inverting horn 234 is installed in the cavity 210, so that new interference sound caused by the phase-inverting noise reduction sound emitted by the phase-inverting horn 234 can be effectively avoided. The first microphone 232 is mounted on the outer wall of the outer sound-proof wall 212, and the sealing member 213 is disposed at the ends of the inner sound-proof wall 211 and the outer sound-proof wall 212 and can be sealed and buckled at the periphery of the ear.
The sealing member 213 of the present embodiment may be a sealing structure such as an air bag or a silicone packing.
The soundproof earmuff 21 of the present embodiment further includes a first soundproof layer 214 and a second soundproof layer 215. The first sound insulation layer 214 is disposed in the cavity 210, and the phase-opposition horn 234 is embedded in the first sound insulation layer 214, and the specific fixing manner may be gluing or embedding in a preset slot for limiting. The sound-insulating earmuff 21 further comprises a second sound-insulating layer 215, the second sound-insulating layer 215 is arranged on the inner side surface of the inner sound-insulating wall 211, and the sound-emitting device 22 is embedded in the second sound-insulating layer 215. The first sound insulating layer 214 and the second sound insulating layer 215 of the present embodiment may be specifically a porous sound absorbing material such as sound absorbing cotton, and may be attached by embedding, laying, or the like.
The sound outlet of the sound production device 22 points to the ear canal and is connected with the audiometric equipment 3 for producing test sound; the sounding device 22 of the present embodiment includes, but is not limited to, various earphone products such as air conduction earphone, bone conduction earphone, etc.
The sound inlet of the first microphone 232 faces outwards and is used for collecting the sound pressure of the environmental noise;
the sound outlet hole of the inverted horn 234 is directed toward the inner sound-proof wall 211 and is used for outputting noise reduction sound;
the sound inlet hole of the second microphone 233 faces the ear and is used for collecting noise sound pressure between the inner side of the inner sound insulation wall 211 and the ear;
the control device 24 is electrically connected to the computer 1 and the audiometric device 3, and is capable of receiving information of the test tone sent by the audiometric device 3 and the sound pressure spectrum collected by the second microphone 233, analyzing and processing the information, and sending a control instruction to the SMC processor 231; the information of the test tone includes, but is not limited to, the frequency and loudness of the test tone;
the SMC processor 231 is capable of receiving instructions from the control device 24 and controlling the output of the inverter speaker 234.
The Control device 24 of the present embodiment is an MCU microcontroller, the SMC processor 231 is a Control chip circuit board integrating a sound pressure monitoring function and a noise reduction function, and is a System Management Control in english, which is named as a System Management controller in chinese.
The audiometric earphone with the intelligent noise reduction function of the embodiment further comprises a display 4, and the control device 24, the computer 1 and the display 4 are electrically connected. The display 4 may be a display screen of the computer 1 or may be a separate display screen. Therefore, the sound pressure spectrum state collected by the first microphone 232 and the second microphone 233 can be transmitted to the computer 1 through the control device 24 and displayed on the display 4 in a spectrogram manner for observation; in addition, the audiometric data of the audiometric device 3 and the sound pressure monitoring data of the control device 24 can be displayed by the display 4, and the display 4 can display the audiometric data and the environmental sound pressure data on the same screen so that the tester can judge whether the test sound is interfered by noise in the audiometric process.
The control device 24 comprises at least one electronic control switch 241, the electronic control switch 241 comprises a first switch 241a, a second switch 241b and a third switch 241c, and the electronic control switch 241 is an automatic switch integrated with the MCU and can be automatically turned on or off according to set parameters. The first switch 241a is a low-pass switch set according to a hearing threshold HL of a dynamic range of human ear hearing, the second switch 241b is a high-pass switch set according to a human ear discomfort threshold UCL, and the third switch 241c is a connecting switch between the control device 24 and the computer 1; the control on whether the control device 24 and the computer 1 interact or not can be realized through a third switch 241 c;
when the ambient sound picked up by the first microphone 232 is higher than the hearing threshold HL, the control device 24 and the SMC processor 231 are activated by the first switch 241a to perform noise reduction;
when the sound signal picked up by the second microphone 233 exceeds the discomfort threshold UCL of the human ear, the control device 24 is started through the second switch 241b to send a noise reduction depth adjustment instruction, and then the maximum output sound pressure of the phase reversal loudspeaker 234 is controlled through the SMC processor 231 to protect the hearing; at the same time, by activating the third switch 241c, the control device 24 will feed back the signal to the computer 1 to prompt for noise interference.
Therefore, during audiometry, the first switch 241a can be used for starting noise reduction and sound pressure monitoring, the second switch 241b can be used for starting noise reduction depth adjustment and adjustment of the maximum output volume of the reverse loudspeaker, and the third switch 241c can be used for achieving interaction between the control device 24 and the computer 1, so that prompt or alarm of abnormal states can be achieved conveniently.
The control device 24 is integrated with a power module 242, the power module 242 is electrically connected to the control device 24, and the SMC processor 231, the first microphone 232, the second microphone 233 and the phase-reversal speaker 234 are electrically connected to the power module 242. Thus, the power supply module 242 can supply power to each power consuming component. The power module 242 of the present embodiment may be a charge/discharge circuit having a charge/discharge function, or may be a battery.
The control device 24 is integrated with an a/D conversion module 243, and the a/D conversion module 243 is electrically connected to the second microphone 233 and the control device 24, respectively. Thus, the a/D conversion module 243 is used to convert the sound signal picked up by the second microphone 233 into a digital signal and feed back the digital signal to the control device 24. The a/D conversion module 243 of the present embodiment is an a/D converter.
The audiometric earphone 2 further comprises a control box 25, the control box 25 is mounted on the outer wall of the sound-proof ear muff 21, and the SMC processor 231 and the control device 24 are mounted in the control box 25. Therefore, the SMC processor 231 and the control device 24 can be integrated on the same circuit board in an integrated manner, and then the whole circuit board is installed in the control box 25, with the circuit board and the reverse speaker being arranged back to back. The control box 25 protects the SMC processor 231 and the electronic components such as the control device 24 and is easy to install.
The first microphone 232 and the second microphone 233 of the present embodiment are both ANC microphones and the number thereof is at least one. Thus, ANC in an ANC microphone is fully merged into Active Noise Cancellation, that is, means Active Noise reduction.
The control device 24 of the present embodiment may be electrically connected to each component through an I/O interface, and may be connected to the audiometric device 3 through a data line or the like, so as to obtain audiometric data.
The working principle of the audiometric earphone 2 of the invention is as follows: when a subject wears the audiometric earphone 2, after the audiometric earphone is turned on, the control device 24 transmits frequency and loudness information of a test tone in a test state of the audiometric equipment 3 to the SMC processor 231, the SMC processor 231 controls the phase reversal loudspeaker 234 to emit a phase reversal sound covering the frequency of the test tone, so that the sound pressure value of noise collected by the second microphone 233 is lower than the sound pressure of the test tone emitted by the audiometric equipment 3, and if the sound pressure of the noise collected by the second microphone 233 is higher than the sound pressure of the test tone, the control device 24 feeds back the sound pressure to the computer 1 for abnormal reminding or even alarming to prompt noise interference;
in the audiometry process, first microphone 232 gathers the outer ambient noise of sound insulation earmuff 21, and the noise that produces the interference to the audiometry can be offset by the anti-phase sound wave that anti-phase loudspeaker 234 sent when cavity 210 in the middle of sound insulation earmuff 21, and then realizes making an uproar of environmental sound pressure, because anti-phase loudspeaker 234 sets up in cavity 210, can effectively avoid the anti-phase that anti-phase loudspeaker 234 sent to fall the noise and cause new interference sound moreover.
Specifically, if the sound pressure of the noise collected by the second microphone 233 is higher than the sound pressure of the test tone, "an alarm red chart" is displayed on the display 4 to indicate noise interference.
The control device 24 can receive the signal of the second microphone 233, calculate and control the noise reduction depth of the SMC processor 231 according to the sound pressure spectrum, and the SMC processor 231 can control the phase reversal loudspeaker 234 to emit phase reversal sound according to the instruction of the control device 24, so as to reduce the cavity sound pressure of the cavity 210, and further reduce the noise sound pressure inside the inner sound insulation wall 211.
Therefore, the control device 24 and the sound pressure monitoring noise reduction device 23 are matched with each other, and the noise reduction function and the sound pressure monitoring function can be simultaneously realized, the audiometric earphone 2 integrates noise reduction and sound pressure monitoring, and is simple in structure, convenient to use and strong in applicability;
more importantly, the inside sound-separating wall 211 is arranged between the phase-reversing horn 234 and the sounding device 22 which emits the test sound, so that the phase-reversing horn 234 and the sounding device 22 cannot be influenced mutually, the test sound and the noise-reducing sound run completely independently and do not interfere with each other, and the cross influence on audiometry or noise reduction is avoided.
In conclusion, the audiometric earphone 2 solves the problem that the hearing examination is interfered by noise, and can effectively isolate environmental noise and self-body noise; the audiometric earphone 2 of the invention can be used for noise reduction and audiometry in common environment, and the noise reduction sound does not form new noise.
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 invention.
Claims (9)
1. An audiometric earphone with an intelligent noise reduction function can be connected with audiometric equipment (3) controlled by a computer (1), and is characterized by comprising a sound insulation earmuff (21), a sound production device (22) arranged on the sound insulation earmuff (21), a sound pressure monitoring noise reduction device (23) and a control device (24);
the sound pressure monitoring and noise reducing device (23) comprises an SMC processor (231), a first microphone (232), a second microphone (233) and an inverse horn (234), wherein the first microphone (232), the second microphone (233) and the inverse horn (234) are electrically connected with the SMC processor (231), and the SMC processor (231) and the second microphone (233) are electrically connected with the control device (24);
the sound-insulation earmuff (21) comprises an inner sound-insulation wall (211), an outer sound-insulation wall (212) and a sealing member (213), the sound-producing device (22) and the second microphone (233) are installed on the inner wall of the inner sound-insulation wall (211), the outer sound-insulation wall (212) is covered on the periphery of the inner sound-insulation wall (211), a cavity (210) is formed between the outer sound-insulation wall and the inner sound-insulation wall, the phase-reversal loudspeaker (234) is installed in the cavity (210), the first microphone (232) is installed on the outer wall of the outer sound-insulation wall (212), and the sealing member (213) is arranged at the end parts of the inner sound-insulation wall (211) and the outer sound-insulation wall (212) and can be sealed and buckled on the periphery of ears;
the sound outlet of the sound production device (22) points to the auditory canal and is connected with the audiometric equipment (3) and used for producing test sound;
the sound inlet hole of the first microphone (232) faces outwards and is used for collecting the sound pressure of the environmental noise;
the sound outlet hole of the inverse horn (234) is directed to the inner sound insulation wall (211) and is used for outputting noise reduction sound;
the sound inlet hole of the second microphone (233) faces the ear and is used for collecting the noise sound pressure between the inner side of the inner sound insulation wall (211) and the ear;
the control device (24) is electrically connected with the computer (1) and the audiometric device (3), and can receive information of a test sound sent by the audiometric device (3) and a sound pressure spectrum collected by the second microphone (233), analyze and process the information and send a control instruction to the SMC processor (231);
the SMC processor (231) is capable of receiving instructions from a control device (24) and controlling the output of the inverting horn (234).
2. Audiometric headset with intelligent noise reduction functionality according to claim 1, further comprising a display (4), wherein the control device (24), the computer (1) and the display (4) are electrically connected.
3. Audiometric headset with intelligent noise reduction according to claim 1, characterized in that the control device (24) comprises at least one electronically controlled switch (241), the electronically controlled switch (241) comprises a switch one (241a), a switch two (241b) and a switch three (241c), the switch one (241a) is a low-pass switch set according to the hearing threshold HL of the human ear hearing dynamic range, the switch two (241b) is a high-pass switch set according to the human ear discomfort threshold UCL, the switch three (241c) is a connection switch between the control device (24) and the computer (1); the switch three (241c) can control whether the control device (24) and the computer (1) are interacted;
-activating the control means (24) and the SMC processor (231) for noise reduction by a switch one (241a) when the ambient sound picked up by the first microphone (232) is above a hearing threshold HL;
when the sound signal picked up by the second microphone (233) exceeds the discomfort threshold UCL of the human ear, the control device (24) is started to send out a noise reduction depth adjustment instruction through a second switch (241b), and then the maximum output sound pressure of the phase reversal loudspeaker (234) is controlled through the SMC processor (231); at the same time, by activating the third switch (241c), the control device (24) will feed back the signal to the computer (1) to prompt for noise interference.
4. The audiometric headset with the intelligent noise reduction function according to claim 1, wherein a power module (242) is integrated on the control device (24), the power module (242) is electrically connected with the control device (24), and the SMC processor (231), the first microphone (232), the second microphone (233) and the inverse-phase speaker (234) are electrically connected with the power module (242).
5. The audiometric headset with the intelligent noise reduction function according to claim 1, wherein an a/D conversion module (243) is integrated on the control device (24), and the a/D conversion module (243) is electrically connected to the second microphone (233) and the control device (24), respectively.
6. An audiometric headset with intelligent noise reduction according to any of claims 1-5, wherein the audiometric headset (2) further comprises a control box (25), the control box (25) is mounted on the outer wall of the sound-proof ear muff (21), and the SMC processor (231) and the control device (24) are mounted in the control box (25).
7. The audiometric headset with the intelligent noise reduction function according to any one of claims 1 to 5, wherein the first microphone (232) and the second microphone (233) are ANC microphones and each number is at least one.
8. The audiometric headset with the intelligent noise reduction function according to any one of claims 1 to 5, wherein the sound insulation earmuffs (21) further comprise a first sound insulation layer (214), the first sound insulation layer (214) is disposed in the cavity (210), and the anti-phase horn (234) is embedded in the first sound insulation layer (214).
9. The audiometric headset with the intelligent noise reduction function according to any one of claims 1 to 5, wherein the sound insulation earmuff (21) further comprises a second sound insulation layer (215), the second sound insulation layer (215) is disposed on an inner side surface of the inner sound insulation wall (211), and the sound generating device (22) is embedded in the second sound insulation layer (215).
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| CN202111237647.2A CN114900765A (en) | 2021-10-22 | 2021-10-22 | Audiometric earphone with intelligent noise reduction function |
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| CN112468915A (en) * | 2020-10-30 | 2021-03-09 | 南京常荣声学股份有限公司 | Headset voice enhancement noise reduction earphone |
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| US5363444A (en) * | 1992-05-11 | 1994-11-08 | Jabra Corporation | Unidirectional ear microphone and method |
| CN110300345A (en) * | 2018-03-23 | 2019-10-01 | 雅马哈株式会社 | The control method of sound outputting device and sound outputting device |
| CN110972012A (en) * | 2019-11-28 | 2020-04-07 | 歌尔股份有限公司 | Earphone control method and earphone |
| CN112312256A (en) * | 2020-07-30 | 2021-02-02 | 深圳市逸音科技有限公司 | Intelligent active noise reduction earphone based on digital communication |
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