WO2005004536A1 - 集音器およびこれを用いた聴力改善装置 - Google Patents
集音器およびこれを用いた聴力改善装置 Download PDFInfo
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- WO2005004536A1 WO2005004536A1 PCT/JP2003/008506 JP0308506W WO2005004536A1 WO 2005004536 A1 WO2005004536 A1 WO 2005004536A1 JP 0308506 W JP0308506 W JP 0308506W WO 2005004536 A1 WO2005004536 A1 WO 2005004536A1
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- sound
- signal
- frequency band
- sound wave
- wave signal
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/40—Arrangements for obtaining a desired directivity characteristic
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/04—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception comprising pocket amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/40—Arrangements for obtaining a desired directivity characteristic
- H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
- H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
Definitions
- the present invention relates to a sound collector that also faithfully collects sound signals from up and down directions so as to collect sounds close to nature, and to a hearing improvement device using the same.
- Conventional hearing aids simply convert the surrounding sound signal into an electrical signal with a microphone, and the converted
- Japanese Patent Application Laid-Open Publication No. Hei 4-2450800 discloses a hearing aid in which the acoustic frequency characteristics are improved by using the pinna and the directional sensitivity is improved.
- a microphone mouth phone unit 10 is attached to a part of the acoustic tube 1 exposed to the outside and close to the pinna 8.
- the sound wave signal applied to the microphone unit 10 efficiently collected by the pinna 8 is converted into an electric signal, and then applied to the amplifier 11 for amplification.
- the amplified electric signal was applied to the earphone driver unit 5, and a sound wave signal was generated from the earphone driver unit 5, which was transmitted to the brain by vibrating the eardrum in addition to the ear canal 3.
- microphones etc. are provided on the left and right, and the audio signal from the microphone Since it only spread out faithfully and output it to the earphone, it sounded unnatural and was unbearable for long-term use.
- the microphone drive unit is mounted on the pinna. Therefore, the auricle is blocked by the earphone drive unit, the microphone unit 10 cannot be arranged in a close place, and the directivity due to the ear effect cannot be increased.
- the present invention focuses on the fact that the pinna has a directivity characteristic of strongly picking up a sound wave signal from a specific direction in a specific frequency band equal to or higher than the audible sound wave signal. It is intended to provide a sound collector capable of collecting sound waves having sexual characteristics and a hearing improvement device using the same.
- the present invention provides a sound collector in which the directivity of a sound signal from a specific direction and at a specific frequency at which an ear-shaped effect included in the sound signal applied to the sound collecting port is generated is enhanced.
- the present invention provides a sound collector in which the directional sensitivity of a sound signal from a specific direction is enhanced in a specific frequency band higher than a sound frequency band included in the sound wave signal applied to the sound collecting port.
- the present invention relates to a signal converter for converting a sound wave signal in an audible frequency band applied from a sound collecting port into an electric signal, and a sound wave signal in a specific frequency band higher than the sound frequency band and in a specific direction to collect sound.
- a sound collector provided with specific sound signal collecting means for adding a collected sound signal to the signal converter;
- the present invention relates to a signal converter for converting a sound wave signal in an audible frequency band applied from a sound collection port into an electric signal, and a sound wave signal in a specific frequency band higher than a sound frequency band and in a specific direction by reflecting the signal.
- a sound collector including a reflector added to a sound collecting port of a transducer.
- the present invention provides a signal converter for converting a sound wave signal in an audible frequency band applied from a sound collection port into an electric signal, an opening, and a sound signal in a specific frequency band higher than the sound frequency band and in a specific direction. And a sound collector for applying a sound signal obtained by the resonator to the signal converter.
- the present invention provides a first signal converter for converting a sound wave signal in an audible frequency band applied from a sound collecting port into an electric signal, a specific frequency band higher than the sound frequency band applied from the sound collecting port and a specific direction.
- a sound collector comprising a second signal converter for converting a sound wave signal into an electric signal, and synthesizing the electric signals converted by the first and second signal converters.
- the present invention relates to a first signal conversion element for converting a sound wave signal in an audible frequency band applied from a sound collector into an electric signal, a specific frequency band higher than the sound frequency band applied from the sound collector and a specific signal.
- a sound collector comprising a second signal conversion element for converting a sound wave signal in the direction into an electric signal, and synthesizing the electric signals converted by the first and second signal conversion elements.
- the present invention relates to a sound collector for converting a sound wave signal in a specific frequency band higher than a sound frequency band applied to a sound collecting port and having enhanced directional sensitivity of a sound wave signal from a specific direction into an electric signal,
- An amplifier for amplifying the electric signal converted by
- a hearing improvement device including a sound generator that converts an electric signal amplified by the amplifier into a sound wave signal and generates a sound.
- the present invention provides a bidirectional microphone microphone phone for converting a sound wave signal in a specific frequency band higher than the sound frequency band included in the left and right signals applied to the sound collecting port and having enhanced directional sensitivity from a specific direction into an electric signal,
- a collection of omnidirectional microphone microphones that converts sound wave signals in a specific frequency band higher than the sound frequency band included in the omnidirectional signal applied to the sound collection port and with enhanced directional sensitivity from a specific direction into electrical signals.
- a hearing improvement device including a sound device, an amplifier for amplifying the electric signal converted by the sound collector, and a sounding device for converting the electric signal amplified by the amplifier to a sound wave signal and generating a sound.
- FIG. 1 to 30 are diagrams relating to a sound collector and a hearing improvement device using the sound collector according to the present invention.
- Fig. 1 (A) and Fig. 1 (B) are model diagrams showing the measurement method of the directivity characteristics of the pinna
- Fig. 1 (A) shows the measurement method of the directivity characteristics in the vertical plane.
- ECM microphone mouth microphone an electronic microphone (hereinafter referred to as ECM microphone mouth microphone) 16 on the outer ear inlet of artificial pinna 15.
- the battery 17 and the resistor 18 are connected to the output of the ECM micro phone 16 and the AC voltage induced across the resistor 18 is measured by the AC voltmeter 19 I do.
- the loudspeaker 20 is placed in front of the ECM microphone 16 and moves equidistantly upward from the horizontal.
- the ECM microphone 16 The electrical signal collected at 16 is converted and measured. Similarly, it moves from horizontal to downward, and at 45 degrees and 90 degrees downward, the ECM microphone 16 collects sound and measures the converted electric signal.
- Fig. 1 (B) shows a method of measuring the directional sound collection characteristics in the horizontal plane, which is almost the same as the method of measuring the directional characteristics in the vertical plane of Fig. 1 (A), and moves the speaker 20 in the vertical plane. Instead, move in a horizontal plane and measure the converted electrical signal collected at ECM Microphone 16 at 45 and 90 degrees forward and backward from the front.
- the speed 20 has a woofer 2 OA and a tweeter 20B.
- the white noise generated by the white noise generator 22 is band-passed by the band-pass filter 23 to pass only the frequency signal to be measured, amplified by the power amplifier 24, and woofer 20A or the tweeter via the switching switch 25. Add to 20 B.
- the white noise generator 22 generates white noise including a frequency of 50 Hz to 50 kHz.
- the white noise is reduced by the bandpass filter 23 in the frequency bands of 125Hz, 250Hz, 500Hz-8 ⁇ and 16kHz. It is separated into sonic signals.
- a 125 Hz band-pass filter 23 passes a 125 Hz sound wave signal by +12 db, but a 250 Hz sound wave signal Becomes 0 db.
- the 5,000 Hz bandpass filter 23 passes the 500 Hz sound signal by +12 db, but the 250 Hz and ⁇ ⁇ ⁇ sound signal. Is 0 db.
- the 8 KHz band-pass filter 23 passes the 8 KHz sound wave signal by +12 db, but does not pass the 4 KHz and 16 KHz sound wave signals. 0 dB, and further attenuated to 1 2 db for 2 kHz.
- the woofer 20 A has a sound wave signal of 1 25 to 2 KHz passed through the bandpass filter 23 Is applied via a switch 25, and a sound signal of 4 KHz to 16 KHz is applied to the tweeter 20B.
- FIGS. 5 (A), 5 (B) to 12 (A), and 12 (B) are directional characteristic diagrams of the right ear obtained by measuring sound wave signals of each frequency by the method described above.
- the bandpass filter 23 passes an electrical signal of 125Hz and the switching switch 25 switches the woofer. Add to 20 A. Then, an audio signal of 125 Hz is generated from the woofer 2 OA
- Fig. 1 (A) when the first fur 20A is located at the front of the ECM microphone at 0 degree, the sound generated from the woofer 20A is collected by the ECM microphone 16, and the ECM microphone is collected.
- the magnitude of the resistor 18 is adjusted so that the electrical signal converted in step 16 is 5 mv (see Fig. 2).
- the sound wave signal generated from the woofer 2 OA is collected by the ECM microphone 16.
- this electrical signal is converted and output by the ECM microphone phone 16 and measured, it is 4 mV.
- the electric signal output from the ECM microphone phone 16 becomes 3 mV.
- the electrical signal extracted from the ECM microphone 16 is 4 mV
- the electrical signal at 125 Hz is 3 mV.
- the directivity characteristic collected by the pinna may be almost half-egg-shaped, as shown in Fig. 5 (A). I understand.
- FIG. 5B is a diagram showing directivity characteristics of a sound wave signal of 125 Hz in a horizontal plane.
- the woofer 2 OA is positioned in front of the ECM micro phone 16 and the resistance value of the resistor 18 is adjusted in the same manner as described above so that the electrical signal of 125 Hz at 0 degrees is 5 mV. I do.
- the electric signal converted and taken out by the ECM microphone 16 is 4 mV, and the electric signal of 125 Hz when the woofer 2 OA is positioned 90 degrees forward and backward. Is 3 mV.
- Fig. 6 (A) and Fig. 6 (B) show the directivity characteristics of the 25 OHz sound signal in the horizontal and vertical planes shown in Fig. 4 (B).
- the sound signal of 250 Hz generated from the woofer 2 OA It can be seen that the sound collection characteristics that are collected at 6 and converted by electrical signals are almost half-egg shaped.
- the directivity characteristics of the 500 Hz, 1 ⁇ ⁇ , 2 KHz, and 4 KHz sound signals in the horizontal and vertical planes show that they are also almost half-egged.
- FIG. 11 (A) is a diagram showing directivity characteristics of an auricle in a horizontal plane of an 8 KHz sound wave signal.
- the electric signal extracted from the ECM microphone phone 16 when the tweeter 20B is positioned in front of the ECM microphone 16 is adjusted to be 5 mV.
- 8 directional characteristics of the auricle in the vertical plane of KH Z of the acoustic wave signal is nearly half egg-shaped like the wave signals of other frequencies.
- the directivity characteristics of the pinna in the vertical and horizontal planes of the sound signal at 16 kHz are sound signals of other frequencies. It becomes almost a half egg shape like. From these results, it was clarified that only the directivity characteristic of the 8 KHz sound wave signal in the vertical plane showed the directivity characteristic of enhancing the sound wave signal from above 45 degrees and collecting sound. As described above, the human pinna enhances and collects sound waves near 8 KHz from approximately 45 degrees above, but the sound signals near 8 KHz are based on the position of the sound source and the direction up, down, front and back. Sex can be determined. The sound wave signal around 8 KHz also works on the right brain to promote its function, and at the same time, induces the generation of alpha waves and theta waves in the brain, which can improve hearing and activate the brain is there.
- FIG. 13 is a side view of the sound collector according to the present invention, which has a directivity characteristic of enhancing the sound wave signal from the upper 45 degrees in the vertical plane of the aforementioned sound wave signal of 8 KHz and collecting the sound. I have.
- ECM Microphone (Electret Microphone) 30 is generally commercially available.
- a reflector 32 is provided in front of and below the sound collection opening 31 of the ECM micro phone 30.
- the reflection plate 32 reflects the sound wave signal for distinguishing the vertical direction and adds it to the ECM microphone 30.
- ECM reflects an 8 KHz sound wave signal approximately 45 degrees above the horizontal plane of the sound collection port 31 of the ECM microphone mouth phone 30 and adds it to the ECM microphone 30.
- ECM In order to add the 8 KHz sound wave signal directly applied to the sound collecting port 3 1 of the microphone 30 and the sound wave signal reflected and added at the sound wave reflection slope 3 1 with a delay of one wavelength, the E CM The microphone is placed at a distance of ⁇ ⁇ 2 ( ⁇ is the wavelength of the sound signal of 8 KH ⁇ ) from the lower surface of the microphone mouth phone 30, and is placed approximately 45 degrees downward from the sound collecting port 31.
- the ECM microphone 30 converts a sound wave signal of 20 Hz to 20 KHz in all directions applied from the sound collecting port 31 into an electric signal according to the added sound wave signal. It has omnidirectional S1.
- the reflection plate 31 reflects an 8 KHz sound wave signal from a direction of approximately 45 degrees upward and adds the sound wave signal directly applied to the sound collection port 31 with a delay of one wavelength. Therefore, the sound wave signal of 8 KHz is the sound wave signal directly applied and the sound wave signal reflected by the reflector 31. Since they are superimposed, they have an 8 KHz directivity S 2 as shown in FIG.
- FIG. 15 is a sensitivity characteristic diagram in the vertical plane of the sound collector of the present invention.
- the sound collecting port 3 1 receives an extra 8 KHz sound wave signal from the direction of approximately 45 degrees reflected from the reflector 3 1, so the sound signal from the direction of 45 degrees above 8 KHz is enhanced. Is done. Therefore, the sound collection characteristics are similar to those of the pinna, and when the electric signal converted by this sound collector is added to the earphone and heard, it sounds like the sound actually collected by the pinna.
- the omnidirectional ECM microphone 30 was used for the ECM microphone 30, but the electric signal was changed according to the magnitude of the 20 Hz to 20 kHz sound wave signal applied from the left and right sound collection ports 31. It may have the bidirectionality S3 for converting the data into the following.
- FIGS. 16A and 16B are model diagrams showing another embodiment of the sound collector of the present invention.
- Fig. 16 (A) is a side view
- Fig. 16 (B) is a front view.
- the reflection plate 34 is curved in an arc shape to enlarge the reflection surface. Directivity of 8 KH z to sound signals from the 4 5 degrees above the more 8 KH Z to increase the reflection area is enhanced reflection plate 34 becomes high.
- FIGS. 17 (A) and 17 (B) are also sound collectors of the present invention.
- FIG. 17 (A) is a side view
- FIG. 17 (B) is a front view.
- a hollow tube 36 is provided in the sound collection port 31 of the ECM microphone 30.
- the hollow tube 36 has a window 37 on the upper surface.
- Medium space 3 6 also is set to be the resonant frequency of the 8 KH Z by selecting a constant length.
- the 8 KHz sound signal coming from the upper direction 45 degrees and entering the window 37 resonates and is enhanced. . Therefore, in the ECM microphone 30 as shown in FIG. 15, a sound collector having 8 KHz Z directivity S 2 in which the 8 KHz sound wave signal arriving from the upper 45 degree direction is enhanced.
- FIG. 18 is a side view of the sound collector of the present invention.
- a window 37 is opened on the upper surface of the hollow tube '36, but a hollow tube 38 whose one end 39 is open is used. In other respects, it is the same as in Fig. 17, with one end to be opened facing up 45 degrees.
- FIG. 19 is a model diagram showing an embodiment of the sound collector of the present invention.
- This is a combination of the omnidirectional ECM microphone 40 and the 8 KHz directional ECM microphone 41.
- the ECM microphone 40 has an omni-directionality S1 for converting a sound wave signal in the entire band of 20 Hz to 20 KHz applied from the sound collecting port 42 into an electric signal in accordance with the added sound wave signal.
- the ECM microphone 41 has an omnidirectional S 2 for converting a sound wave signal in the entire band of 8 KHz applied from the sound collecting port 43 into an electric signal in accordance with the added sound wave signal.
- ECM microphone opening The sound collecting opening 43 of the phone 4 ⁇ faces upward 45 degrees from the horizontal direction.
- the ECM microphone 40 the sound wave signal of the entire band from 20 Hz to 20 KHz added from the sound collecting port 42 is converted into an electric signal according to the added sound wave signal. Convert. Further, the ECM microphone 41 generates an electric signal in response to an 8 KHz sound wave signal coming from approximately 45 degrees above the sound collecting port 43. These electric signals are synthesized by a synthesis circuit 44. Therefore, an output signal having the directivity characteristics shown in FIG. 15 is obtained.
- the ECM microphone 40 uses an omnidirectional microphone port phone, it may be a bidirectional microphone port phone or a unidirectional microphone port phone.
- FIG. 20 is a model diagram showing an embodiment of the sound collector of the present invention.
- An omnidirectional signal conversion element and an 8 KHz directivity signal conversion element are combined in one container 45 to form a multidirectional ECM microphone. Otherwise, it is the same as the sound collector of FIG.
- FIG. 21 is a circuit diagram of a hearing improvement device using the sound collector described above.
- the sound collector 50 combines the omnidirectional ECM microphone 30 and the reflector 32 to increase the directional sensitivity to an 8 KHz sound wave signal from 45 degrees above. Accordingly, as shown in FIG. 1 4, the sound collector 5 0 while have a omnidirectional, having the directivity of the 8 KH Z with increased directivity sensitivity of acoustic signals from the upper 4 5 degrees, and ear A similar sound wave signal is collected.
- the collected sound wave signal is converted into an electric signal by a signal conversion element in the sound collector 50.
- the electric signal output from the sound collector 50 is amplified by the amplifier 51 and is output from the earphones 52 and 52.
- the electric signal output from the sound collector 50 has the enhanced directivity of the sound wave signal from 45 degrees to 8 KHz, which is the same as that of the pinna, the sound signal emitted from the earphone is also directly in the ear. The sound is the same as listening through, so you can listen comfortably.
- FIG. 22 shows a two-point stereo hearing improvement device using the sound collector of the present invention on each of the left and right sides.
- the sound collectors 50 R and 5 OL of the present invention are used at intervals between the left and right sides. Sound signals from the left and right are collected by the sound collectors 50 R and 50 L and converted into electric signals. In both cases, sound signals from the upper 45 degrees are collected by the sound collectors 50R and 50L, converted into electric signals, and output.
- the converted electric signal is amplified by the amplifiers 51 R and 51 L and output from the earphones 52 R and 52. Pronounced. Therefore, along with the sound signals from the left and right, the sound signals from the upper 45-degree direction are also reproduced, so that external sounds can be comfortably heard as if they were actually heard with ears.
- Figure 23 shows a hearing improvement device using a one-point stereo microphone mouthpiece.
- Fig. 22 sound signals from the left and right directions are collected by sound collectors provided at right and left intervals. Is to collect sound.
- a bidirectional ECM microphone 57 and an omnidirectional ECM microphone 58 are combined to form a one-point stereo microphone, and a bidirectional ECM microphone microphone phone.
- 5 7 Left and right sound collectors 5 7 A, reflectors in front of 5 7 B
- A, 60 B are provided.
- a reflector 60 C is provided in front of and below the sound collection opening 58 A in front of the omnidirectional ECM microphone 58.
- the reflectors 60A, 60B, and 60C are for reflecting the sound wave signal for distinguishing the vertical direction and adding it to the ECM microphone 30.
- an R-L signal with an enhanced directivity of the 8 KHz sound wave signal from the upper 45-degree direction is collected as described above (R is the right signal , L is the left signal).
- an L-R signal with an enhanced directional sensitivity of an 8 KHz sound wave signal from an upper 45-degree direction is collected.
- an R + S + L signal with an enhanced directivity of the 8 KHz sound wave signal from the upper 45 degree direction is collected (S is a middle tone). These signals are converted to electrical signals by the ECM microphone microphones 57, 58, and have the same resistance value.
- the right signal R + S / 2 is extracted from the connection point, and the connection point between the resistors 6 3 C and 6 3 D is Left signal L + S / 2 is retrieved.
- These are amplified by the amplifiers 64 R and 64 L, respectively, and sounded from the headphones 65 R and 65 L.
- Fig. 24 shows a hearing improvement device using the same one-point stereo microphone mouth phone as Fig. 23.
- the difference from Fig. 23 is that the right and left signals obtained by combining from the combining circuit 62 are supplied to the left and right summing amplifiers 6R and 6L via the 1 ms delay attenuating circuits 66R and 66L. It is in addition.
- a right signal R + S / 2 + ALi and a left signal L + S / 2 + ARi are obtained (A is a delay attenuation characteristic).
- a reflector was used to increase the directivity of the sound signal from the upper 45 degrees, but as shown in FIG. 17, 8 KHz was used instead of the reflector.
- a hollow tube that resonates with the sound wave signal of the second embodiment may be used.
- an omnidirectional ECM microphone and an 8 KHz directional microphone port phone may be combined.
- FIG. 25 is a configuration diagram of the hearing improvement device of the present invention. Inside the case 70, there are provided a bidirectional microphone 50 and an amplifier mounted facing the sound collecting surface 72 shown in FIG. A volume controller 74 is attached to the amplifier to adjust the volume. Case 70 can be used on a table or in a pocket. '
- FIG. 26 is a block diagram of the hearing improvement device of the present invention, which is the same as FIG. 25 except that two earphones are connected to the amplifier.
- FIG. 27 is a block diagram of the hearing improvement device of the present invention, using the two-byte stereo microphone shown in FIG. Case 75 ⁇ is provided with bidirectional microphones 5OR and 50L and amplifiers, which are mounted facing sound collecting surfaces 76R and 76L, respectively. Outside the case 70, earphones 73R and 73L are connected. A volume controller 74 is attached to the amplifier to adjust the volume.
- the hearing improvement device of the present invention is mainly used on a desk.
- FIG. 28 is a block diagram of the hearing improvement device of the present invention, which also uses the 2-byte stereo microphone shown in FIG.
- Microphone mouth phone case 7 R, 77 L Multi-directional microphones 50 R, 50 L attached to the sound collecting surface at the tip of 7 L, 78 R, 78 L respectively And an amplifier. Earphones 73R and 73L are connected to the amplifier. By placing the left and right microphones in separate cases in this way, it is possible to adjust the distance between the left and right microphones near the auricles, etc. You.
- FIG. 29 is a configuration diagram of the hearing improvement device of the present invention, which uses the one-byte stereo microphone opening phone shown in FIGS.
- the case 80 is provided with a bidirectional one-point microphone 50 T facing the sound collecting surface 81 and an amplifier. Outside the case 80, the headphones 73R and 73L are connected. A volume controller 74 is attached to the amplifier to adjust the volume. If the size improvement device of the present invention is miniaturized, it can be used in a pocket or the like.
- FIG. 30 is a block diagram of the hearing improvement device of the present invention, which uses the one-byte stereo microphone mouthphone shown in FIGS.
- the difference from Fig. 29 is that the one-point microphone 50T is provided in a separate case from the amplifier, and is downsized. If the case is stopped with a clip or the like, it can be used with a clip on a shirt pocket or the like.
- the earphones 73 R and 73 L are connected to the amplifier in the same manner as the other amplifiers.
- the hearing aids shown in Figs. 25 to 30 use bidirectional microphones, but in all cases, the 8 KHz directional characteristics of the multidirectional microphones are directed upward by 45 degrees in normal use. So that it is attached. The invention's effect .
- the sound collector of the present invention has enhanced directivity of a sound signal from a specific direction and a specific frequency at which an ear-shaped effect included in a sound signal applied to a sound collecting port is generated, so that a directivity similar to the pinna is obtained. Characteristics are obtained.
- Particularly pinna has a directional characteristic for collecting and enhance the acoustic signal in the vicinity of 8 KH z from substantially above 4 5 degrees, around 8 KH Z from the sound collector also substantially above 4 5 degrees according to the present invention
- the sound wave signal is enhanced and the sound is collected, so that a directivity characteristic similar to the pinna is obtained.
- the sound collector of the present invention reflects a sound wave signal in a specific frequency band higher than the audio frequency band and in a specific direction by the reflector and adds the reflected sound wave signal to the sound collecting port of the signal converter. Directivity characteristics similar to the pinna are obtained.
- the sound collector of the present invention has an opening, and a sound signal obtained by a hollow tube that resonates with a sound signal in a specific frequency band higher than the sound frequency band and in a specific direction is applied to the signal converter. Therefore, a directivity characteristic similar to the pinna can be obtained with a simple structure.
- This sound collector is a first signal converter that converts sound wave signals in the audible frequency band applied from the sound collector into electric signals, and a specific frequency higher than the sound frequency band applied from the sound collector.
- a second signal converter for converting a sound signal in a specific direction in the band into an electric signal, and the electric signals converted by the first and second signal converters are combined, so that a simple structure is provided. Thus, directivity characteristics similar to the pinna can be obtained.
- the hearing improvement device of the present invention collects sound waves in a specific frequency band in which an ear-shaped effect is produced by a sound collector and raises the directional sensitivity of the sound signals from a specific direction, converts the sound signals into electric signals, and uses an amplifier to collect sound signals.
- the electric signal converted by the amplifier is amplified, and the electric signal amplified by the amplifier is converted into a sound wave signal so as to generate sound.
- the ear improvement effect can be obtained even if the sound collector is attached to a body part other than the pinna. Convenient to use.
- the hearing improvement device of the present invention can realize a stereo one-point microphone mouthphone having an ear effect by combining a bidirectional microphone mouthphone and an omnidirectional microphone mouthphone. It can be used as a good hearing aid that can be worn anywhere on the body.
- FIG. 1 is a diagram showing the measurement method of the directivity characteristics of the pinna, which is the principle of the present invention.
- Fig. 2 (B) is a diagram showing a method of measuring directivity characteristics in a horizontal plane
- Fig. 2 (B) is a diagram showing a method of measuring directivity characteristics in a horizontal plane.
- FIG. 3 is a circuit diagram of a microphone used in the measurement method of the present invention
- FIG. 3 is a circuit diagram of a speaker used in the measurement method of the directivity characteristic of the pinna which is the principle of the present invention
- FIG. 4 is the principle of the present invention.
- FIG. 4 (a) sound signal waveform diagram of 1 2 5H Z is
- Fig. 4 (C) shows a 500 Hz sound wave signal waveform diagram
- Fig. 4 (D) shows a 1 kHz sound wave signal waveform diagram
- Fig. 4 (E) shows a 2 kHz sound wave.
- Signal waveform diagram Fig. 4 (F) is a 4 KHz sound wave signal waveform diagram
- Fig. 4 (G) is an 8 KHz sound wave signal waveform diagram
- Fig. 4 (H) is a 16 KHz sound wave signal waveform diagram.
- Fig. 5 is a diagram of the sound collection characteristics at 125 Hz of the pinna, which is the principle of the present invention.
- Fig. 5 (A) is a directional characteristic diagram in a vertical plane
- Fig. 5 (A) is a directional characteristic diagram in a vertical plane
- Fig. 5 (A) is a directional characteristic diagram in a vertical plane
- FIG. 5 (B) is a directional characteristic diagram in a horizontal plane.
- FIG. 6 is a sound collection characteristic diagram of 2 5 0 H Z of the auricle is present onset Ming principle
- FIG. 6 (B) is a directional characteristic diagram in the horizontal plane
- FIG. 7 is a diagram of the sound collection characteristics at 500 Hz of the pinna which is the principle of the present invention
- FIG. 7 (A) is a directional characteristic diagram in the vertical plane
- Fig. 7 (B) is a directional characteristic diagram in the horizontal plane
- Fig. 8 is a diagram of the sound collection characteristics at 1 KHz of the pinna which is the principle of the present invention
- Fig. 8 (A) is a directional characteristic diagram in the vertical plane.
- Fig. 8 (B) is the directional pattern in the horizontal plane
- Fig. 9 is the sound collection characteristic at 2 KHz of the pinna which is the principle of the present invention
- FIG. 9 (A) is the directional pattern in the vertical plane.
- 9 (B) is a directional characteristic diagram in a horizontal plane
- FIG. 10 is a sound collection characteristic diagram of the pinna at 4 KHz which is the principle of the present invention
- FIG. 10 (A) is a directional characteristic diagram in a vertical plane
- Fig. 10 (B) is a directional pattern in the horizontal plane
- Fig. 11 is a sound collection characteristic of the pinna at 8 KHz, which is the principle of the present invention
- Fig. 11 (A) is a directional characteristic in the vertical plane.
- Figure, Figure 11 (B) is a directional characteristic diagram in the horizontal plane
- Figure 12 is the principle of the present invention, which is a 16 kHz sound collection of the pinna Fig.
- FIG. 12 (A) is a directional pattern in the vertical plane
- Fig. 12 (B) is a directional pattern in the horizontal plane
- Fig. 13 is a side view of the sound collector of the present invention.
- 14 is a directional characteristic diagram of the sound collector of the present invention
- FIG. 15 is a vertical plane ⁇ sensitivity characteristic diagram of the sound collector of the present invention
- FIG. 16 is a sound collector of the present invention.
- 16 (A) is a side view
- FIG. 16 (B) is a front view
- FIG. 17 is a sound collector of the present invention
- FIG. 17 (A) is a side view
- FIG. 17 (B) is
- FIG. 18 is a front view
- FIG. 18 is a side view of the sound collector of the present invention
- FIG. 18 is a side view of the sound collector of the present invention
- FIG. 19 is a side view of the sound collector of the present invention
- ⁇ 20 is a side view of the sound collector of the present invention.
- FIG. 21 is a circuit diagram of the hearing improvement device of the present invention
- FIG. 22 is a circuit diagram of the hearing improvement device of the present invention
- FIG. 23 is a circuit diagram of the hearing improvement device of the present invention.
- 24 is a circuit diagram of the hearing improvement device of the present invention W
- FIG. 25 is a model diagram of the hearing improvement device of the present invention
- FIG. 26 is a model diagram of the hearing improvement device of the present invention
- FIG. 27 is a model diagram of the hearing improvement device of the present invention
- FIG. 28 is a model diagram of the hearing improvement device of the present invention
- FIG. 29 is a model diagram of the device of the present invention
- FIG. 30 is a model diagram of the hearing improvement device of the present invention.
- Figure 31 shows that
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Stereophonic Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/008506 WO2005004536A1 (ja) | 2003-07-03 | 2003-07-03 | 集音器およびこれを用いた聴力改善装置 |
AU2003304621A AU2003304621A1 (en) | 2003-07-03 | 2003-07-03 | Sound collector and hearing improving device using this |
JP2005503383A JP4190535B2 (ja) | 2003-07-03 | 2003-07-03 | 集音器およびこれを用いた聴力改善装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/008506 WO2005004536A1 (ja) | 2003-07-03 | 2003-07-03 | 集音器およびこれを用いた聴力改善装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005004536A1 true WO2005004536A1 (ja) | 2005-01-13 |
Family
ID=33562085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/008506 WO2005004536A1 (ja) | 2003-07-03 | 2003-07-03 | 集音器およびこれを用いた聴力改善装置 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4190535B2 (ja) |
AU (1) | AU2003304621A1 (ja) |
WO (1) | WO2005004536A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55110498A (en) * | 1979-02-19 | 1980-08-25 | Matsushita Electric Ind Co Ltd | Head phone unit |
JPS6134200U (ja) * | 1984-07-31 | 1986-03-01 | ソニー株式会社 | 集音器 |
JPH04245800A (ja) * | 1991-01-31 | 1992-09-02 | Sony Corp | 補聴器 |
JPH10276498A (ja) * | 1997-03-31 | 1998-10-13 | Sayama Precision Ind Co | 補聴器及び補聴器の耳栓 |
JP2002153501A (ja) * | 2000-11-17 | 2002-05-28 | Tensenkai | 集音具 |
-
2003
- 2003-07-03 JP JP2005503383A patent/JP4190535B2/ja not_active Expired - Fee Related
- 2003-07-03 WO PCT/JP2003/008506 patent/WO2005004536A1/ja active Application Filing
- 2003-07-03 AU AU2003304621A patent/AU2003304621A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55110498A (en) * | 1979-02-19 | 1980-08-25 | Matsushita Electric Ind Co Ltd | Head phone unit |
JPS6134200U (ja) * | 1984-07-31 | 1986-03-01 | ソニー株式会社 | 集音器 |
JPH04245800A (ja) * | 1991-01-31 | 1992-09-02 | Sony Corp | 補聴器 |
JPH10276498A (ja) * | 1997-03-31 | 1998-10-13 | Sayama Precision Ind Co | 補聴器及び補聴器の耳栓 |
JP2002153501A (ja) * | 2000-11-17 | 2002-05-28 | Tensenkai | 集音具 |
Also Published As
Publication number | Publication date |
---|---|
AU2003304621A1 (en) | 2005-01-21 |
JPWO2005004536A1 (ja) | 2006-08-17 |
JP4190535B2 (ja) | 2008-12-03 |
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