WO1991011078A1 - Earphone device - Google Patents
Earphone device Download PDFInfo
- Publication number
- WO1991011078A1 WO1991011078A1 PCT/JP1991/000058 JP9100058W WO9111078A1 WO 1991011078 A1 WO1991011078 A1 WO 1991011078A1 JP 9100058 W JP9100058 W JP 9100058W WO 9111078 A1 WO9111078 A1 WO 9111078A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microphone unit
- signal
- earphone
- unit
- sound
- Prior art date
Links
Classifications
-
- 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
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/06—Protective devices for the ears
- A61F11/08—Protective devices for the ears internal, e.g. earplugs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/06—Protective devices for the ears
- A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
- A61F11/145—Protective devices for the ears external, e.g. earcaps or earmuffs electric, e.g. for active noise reduction
-
- 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1783—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
- G10K11/17837—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions by retaining part of the ambient acoustic environment, e.g. speech or alarm signals that the user needs to hear
-
- 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17857—Geometric disposition, e.g. placement of microphones
-
- 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17861—Methods, e.g. algorithms; Devices using additional means for damping sound, e.g. using sound absorbing panels
-
- 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3013—Analogue, i.e. using analogue computers or circuits
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3214—Architectures, e.g. special constructional features or arrangements of features
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/321—Physical
- G10K2210/3222—Manual tuning
-
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/50—Miscellaneous
- G10K2210/509—Hybrid, i.e. combining different technologies, e.g. passive and active
-
- 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
- H04R1/1016—Earpieces of the intra-aural type
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/01—Input selection or mixing for amplifiers or loudspeakers
Definitions
- the present invention relates to a so-called active earphone device capable of reducing external noise with a low profile.
- a so-called ear rest type is widely known as a noise reduction device used for work in a place with high external noise.
- this earpiece-type noise reduction device is mounted so as to cover the ears with a headphone cup, and the headphone cap is pressed against the temporal region to reduce noise. It was used so that external noise from surroundings did not enter between the headphones and the temporal region.
- the above-described conventional noise reduction device needs to strongly press the headphone cap against the temporal region in order to prevent external noise from entering from between the headphone cup and the temporal region. Because of this, there is a feeling of pressure on the temporal region, and the noise reduction device itself is too large and heavy, making it unbearable for long-term use. In addition, the headphone cup alone cannot cut off the low-frequency range of noise (several hundred Hz to 1 KHz or less) .In addition, we tried to reduce the noise and listen to the reproduced sound using the method described above. In this case, the reflection of the reproduced sound in the headphone cup causes a so-called head The inner localization phenomenon occurred, which had an adverse effect on communications.
- This head localization phenomenon means that when the sound source side is viewed from the ear canal, the acoustic impedance at the entrance of the ear canal 0 is different from the impedance in the ear canal. Reflection occurs between the entrance and the reflected wave returning to the eardrum, causing the sound image to be localized in the head, causing discomfort such as so-called clogging of the ears.
- a so-called active type earphone device is known as an earphone device used for work in a place with high external noise.
- This type of earphone device converts an external noise into an electric signal by a microphone unit as disclosed in a headphone of Japanese Patent Application Laid-Open No. 62-027998, for example.
- the negative feedback loop that feeds back in opposite phase reduces noise near the headphone unit.
- the active type earphone device has high sound insulation performance and can almost completely shield external sounds. Therefore, when listening to external sounds such as emergency information and human voices, for example, However, the earphone device had to be removed from the ear, which was very inconvenient.
- the present invention has been made in consideration of the above-described conventional problems, and has been developed in such a manner that it can withstand long-term use without causing intraocular localization and without compressing the temporal region, and can effectively reduce external noise.
- the purpose is to provide an earphone device.
- the earphone device according to the present invention has a sound tube whose inner diameter is substantially the same as that of the ear canal, one end of which is a pinna attachment portion, and the other end of which is a non-reflection end of sound. And an earphone unit and an internal microphone unit which are attached to the peripheral surface of the above-mentioned acoustic tube so that each vibrating surface faces the inside of the tube and are attached to each other close to each other.
- the external noise is reduced by inverting the phase of the signal obtained from the above and supplying the inverted signal to the above-mentioned earphone unit.
- the earphone device according to the present invention effectively reduces external noise without compressing the temporal region, and does not cause discomfort such as a feeling of pressure even when used for a long time.
- the earphone device according to the present invention has an acoustic tube having substantially the same inner diameter as the ear canal, one end of which serves as a pinna attachment portion, and the other end of which serves as a non-reflection end of sound.
- An external microphone unit disposed outside and converting external sound into an electric signal, and an earphone unit and an internal microphone unit which are attached to the peripheral surface of the acoustic tube so that the vibrating surface faces the inside of the tube and are close to each other.
- FIG. 1 is a c Fig. 2 is a cross-sectional view of the acoustic tube portion of the earphone device according to the present invention are pro-click diagram showing a configuration of the earphone device.
- FIG. 3 is a perspective view showing an appearance of a headset to which the above-mentioned earphone device is applied.
- FIG. 4 is a block diagram showing another configuration example of the earphone device according to the present invention.
- BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of an earphone device according to the present invention will be described with reference to the drawings.
- FIG. 1 is a cross-sectional view when the earphone device according to the present invention is worn.
- the earphone device has an inner diameter W that is substantially the same as the inner diameter Wo of the ear canal A, and has an auricle mounting member (4) made of a flexible material such as synthetic resin or rubber at one end.
- a vibrating surface is provided on each of the acoustic tube (1) provided with a sound absorbing material (5) such as a flute so that the other end side is a non-reflective end of sound, and a peripheral surface of the acoustic tube (1).
- It consists of an earphone unit (3) and an internal microphone unit (6), which are mounted close to each other.
- the above-mentioned acoustic tube (1) is an earphone housing, has a uniform inner diameter W, and is substantially the same as the inner diameter W o of the ear canal A, and absorbs sound so that the other end side is a non-reflection end of sound.
- the acoustic impedance of the acoustic tube (1) is made substantially the same as the impedance of the external auditory canal A, so that the so-called in-head localization phenomenon is prevented.
- the jar unit (3) and the internal microphone unit (6) are arranged such that each diaphragm is parallel to the side surface of the sound tube (1).
- the cross-sectional area S, of the acoustic tube (1) is substantially the same as the cross-sectional area S 2, S 3 of the mounting portion of the earphone unit (3) and the internal microphone unit (6). It is installed to be.
- FIG. 2 is a block diagram showing a configuration of the earphone device.
- a received signal or the like is supplied to an equalizer (8) via an input terminal (7) as an input acoustic signal.
- the equalizer (8) enhances and outputs the audio portion of the input audio signal by, for example, increasing the middle frequency of the frequency of the input audio signal.
- This output signal is supplied to a control circuit (10) via an adder (9) described later.
- the frequency adjustment by the equalizer (8) may be performed by any level adjustment.
- the control circuit (10) controls the adder so that the entire circuit from the equalizer (8) to the earphone unit (3) corresponds to the acoustic frequency characteristics of the external noise reaching the ear. Control the frequency characteristics of the output signal supplied from (9).
- the output signal from the control circuit (10) is supplied to the above-mentioned earphone unit (3) via the amplifier circuit (11).
- the amplification circuit (11) may be configured so that the amplification factor can be varied in order to make the reproduced sound easier to hear.
- the earphone unit (3) performs electro-acoustic conversion on the output signal supplied from the amplifying circuit (11) and emits the output signal as reproduced sound.
- the adder (12) is output from the earphone unit (3).
- the external noise and the external noise that reaches the ear canal A through the gap between the earphone unit (3) and the ear are added, and this state is expressed as a block in an equalized manner.
- the reproduced sound added to the external noise is picked up by the internal microphone ⁇ hood (6) and converted into an electric signal.
- the internal micro hood (6) inverts the phase of the electric signal of the collected reproduced sound and supplies the inverted signal to the adder (6).
- the adder 9 performs an addition process on the phase-inverted signal supplied from the internal microphone port hood unit (6) and the output signal from the equalizer (8).
- the sound produced from the earphone unit (3) can be a clear reproduced sound from which external noise has been removed.
- the reproduced sound is output via the output terminal (14).
- the signal level supplied from the input terminal (7) is S
- the transfer function of the internal microphone unit (6) is M
- the transfer function of the control circuit (10) is The transfer function of (11) is A
- the transfer function of the earphone unit (3) is H
- the external noise level supplied from the input terminal (13) is N
- the transfer function of the output terminal (14) is Assuming that the playback audio level output from the device is P, the playback audio level P is
- the reproduced sound level P is not affected by the transfer function A of the amplifier circuit (11) or the transfer function H of the earphone unit (3). Therefore, by making the gain of the amplifier circuit (11) variable under the condition of satisfying AHMyS >> l, negative feedback is provided by the internal microphone unit (6) regardless of the level of the reproduced sound.
- the level of the external noise can be varied. For example, when the external noise is high, the gain of the amplifier circuit (11) is increased to increase the noise reduction amount. Conversely, when the external noise is low, the amplifier circuit ( By reducing the gain in 11), the above-mentioned head localization phenomenon can be effectively prevented, and the reproduced sound can be clearly heard.
- an external microphone (17) for collecting external sound is provided outside the above-mentioned acoustic tube (1), and an external microphone provided by the external microphone (17) is provided.
- the sound signal may be supplied to the addition (9) and added to the input audio signal.
- FIG. 3 is a perspective view showing the appearance of a headset to which the earphone device is applied.
- the acoustic tube (1) is bent within a range that does not affect the acoustic impedance so that each mounting member (4) faces the ear canal entrance.
- the two acoustic tubes (1) and (1) are connected by the connecting member (15).
- an end of a bar (21) is attached to the connecting member (15) or the like, and a transmission microphone (20) is attached to the other end of the bar (21).
- these two sound tubes (1) and (1) are put on the head E as a hairband, and the mounting member (4) of the sound tube (1) is slightly opened and attached to the pinna D.
- the mounting member (4) is pressed against the entrance of the ear canal A from both sides so as not to be pressed, and the mounting member (4) can be prevented from coming off the pinna D. Mounting and clear communication can be performed.
- the earphone device uses the above-mentioned acoustic tube (1), there is no reflection of sound in the tube, no localization phenomenon in the head, and no external sound is generated. Noise can be reduced effectively and downsizing and weight reduction can be achieved. For this reason, voices and the like can be clearly heard without reproducing at a high volume, and the voices and the like being heard are not leaked to the surroundings. In addition, the distortion of the earphone unit can be reduced by the negative feedback loop.
- the earphone device according to the present invention may be used for an earphone device such as a small portable headphone player, a handset of a telephone, and the like.
- the earphone device is formed with an inner diameter W substantially the same as the inner diameter W 0 of the ear canal A, and is provided with an auricle mounting member (34) made of a flexible material such as synthetic resin or rubber at one end. The other end is the non-reflective end of the sound
- an acoustic tube (31) provided with a sound absorbing material (35) such as felt, and an earphone unit which is attached to the peripheral surface of the acoustic tube (31) so as to be close to each other with the vibrating surface facing the inside of the tube.
- the mixing circuit (38) includes a first variable gain control circuit (40) for varying the gain of the input audio signal, and a second variable gain control circuit (41) for controlling the gain of the negative feedback signal.
- a third variable gain control circuit (42) for controlling the gain of the external noise signal; and an adder for adding the output signals from the variable gain control circuits (40), (41) and (42), respectively. (43).
- the acoustic tube (31) serves as an earphone housing, has a uniform inner diameter W, is substantially the same as the inner diameter W o of the ear canal A, and absorbs sound so that the other end side is a non-reflective end of sound.
- the sound impedance of the sound tube (31) is made substantially the same as the impedance of the ear canal A, and so-called head localization phenomenon is prevented. ing.
- the earphone unit (33) and the internal microphone unit (36) are arranged so that each diaphragm is parallel to the side surface of the acoustic tube (31).
- the cross-sectional area S 1 of the acoustic tube (31) is substantially the same as the cross-sectional area S 2 .S 3 of each of the mounting portions of the earphone unit (33) and the internal microphone unit (36). Taking Is attached.
- An input audio signal such as a music signal reproduced from a small portable stereo cassette tape recorder or the like is supplied from an input terminal (39) to the first variable gain control circuit (40) of the mixing circuit (38) and the adder ( The signal is supplied to the amplifier circuit (44) via the switch (13), amplified by the amplifier circuit (44), and supplied to the earphone unit (33).
- the earphone unit (33) converts the output signal supplied from the amplifier circuit (41) into an electric-acoustic sound and generates the reproduced sound.
- the sound produced by the earphone unit (33) is transmitted to the eardrum B via the external auditory canal A, and is also collected by the internal microphone unit (36).
- the sound collected by the internal microphone unit (36) is supplied as an audio signal to the reverse phase circuit (32) via the amplifier circuit (45).
- the reverse phase circuit (32) inverts the phase of the audio signal supplied from the amplifier circuit (45).
- the output signal of the reverse phase circuit (32) is supplied to the adder (43) via the second variable gain control circuit (41) as a negative feedback signal having a phase opposite to that of the audio signal.
- the external microphone unit (37) collects external noise transmitted to the ear canal.
- An external noise signal obtained by collecting external noise by the external microphone unit (37) is amplified by an amplifier circuit (46), and is added to the adder through the third variable gain control circuit (42). (43).
- the adder (43) performs an addition process on the input audio signal, the negative feedback signal, and the external noise signal, and outputs the added signal obtained through the addition process via the amplification circuit (44). And supplies it to the earphone unit (33).
- the earphone unit (33) converts an output signal supplied from the amplifier circuit (44) into an acoustic output and emits sound.
- the earphone device is configured such that the mixing ratio of the input acoustic signal, the negative feedback signal, and the external noise signal, which is added in the adder (33), is determined by each variable gain control circuit ( Control can be performed using (40), (41), and (42).
- the third variable gain control circuit U2) In other words, during normal use where the user wants to hear the reproduced sound of the input sound signal without being affected by external noise, the third variable gain control circuit U2)
- the gain of the zero-part noise signal is adjusted to be small or off, and the input sound signal and the negative feedback signal are input by the first variable gain control circuit (40) and the second variable gain control circuit (41).
- the gain By adjusting the gain to an arbitrary level, it is possible to hear a good reproduced sound with little noise.
- the third variable gain control circuit (42) which keeps the gain adjustment of the input audio signal and the negative feedback signal as it is, or makes the gain adjustment smaller or off, and makes it smaller or off until now.
- the third variable gain control circuit (42) which keeps the gain adjustment of the input audio signal and the negative feedback signal as it is, or makes the gain adjustment smaller or off, and makes it smaller or off until now.
- this earphone device creates a substantially silent state by turning off the first variable gain control circuit (40) and canceling external noise reaching the eardrum B by the negative feedback loop.
- the gain of the external noise signal by the third variable gain control circuit (42) as described above External sound can be heard with the device installed.
- variable gain control circuits (40), (41), and (42) can be adjusted by operating a switch or volume.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91902743A EP0464220B1 (en) | 1990-01-19 | 1991-01-18 | Earphone device |
KR1019910701122A KR100231219B1 (ko) | 1990-01-19 | 1991-01-18 | 이어폰 장치 |
DE69113333T DE69113333T2 (de) | 1990-01-19 | 1991-01-18 | Ohrstückvorrichtung. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008510A JP2778174B2 (ja) | 1990-01-19 | 1990-01-19 | イヤホン装置 |
JP2/008509 | 1990-01-19 | ||
JP2/008510 | 1990-01-19 | ||
JP2008509A JP2778173B2 (ja) | 1990-01-19 | 1990-01-19 | 騒音低減装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991011078A1 true WO1991011078A1 (en) | 1991-07-25 |
Family
ID=26343033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1991/000058 WO1991011078A1 (en) | 1990-01-19 | 1991-01-18 | Earphone device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0464220B1 (ja) |
KR (1) | KR100231219B1 (ja) |
DE (1) | DE69113333T2 (ja) |
WO (1) | WO1991011078A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101242677B (zh) * | 2007-02-05 | 2012-07-04 | 索尼株式会社 | 耳机设备、声音再现系统和声音再现方法 |
WO2016203117A1 (en) * | 2015-06-18 | 2016-12-22 | Hefio Oy | Earpiece for acoustical source and load modeling |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2436657B (en) * | 2006-04-01 | 2011-10-26 | Sonaptic Ltd | Ambient noise-reduction control system |
TWI315158B (en) * | 2006-06-09 | 2009-09-21 | Cotron Corporatio | Earphone with a sound guiding tube |
JP4823362B2 (ja) * | 2007-09-07 | 2011-11-24 | パイオニア株式会社 | イヤホン |
CN107155406B (zh) * | 2014-10-31 | 2019-07-09 | 索尼公司 | 声学换能器 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55165574U (ja) * | 1979-05-15 | 1980-11-28 | ||
JPS5756083U (ja) * | 1980-09-17 | 1982-04-01 | ||
JPS609397U (ja) * | 1983-06-29 | 1985-01-22 | 高橋 伸介 | 前面から質の良い音を聞くヘツドホ−ン |
JPS60220698A (ja) * | 1984-04-13 | 1985-11-05 | ボ−ズ・コ−ポレ−シヨン | ヘツドホ−ン装置 |
JPS6180997A (ja) * | 1984-09-27 | 1986-04-24 | Nec Corp | 音量調節器付き拡声装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1299725C (en) * | 1987-07-20 | 1992-04-28 | Robert Christopher Twiney | Noise reduction systems |
CA1336295C (en) * | 1988-09-21 | 1995-07-11 | Masayoshi Miura | Sound reproducing apparatus |
-
1991
- 1991-01-18 DE DE69113333T patent/DE69113333T2/de not_active Expired - Lifetime
- 1991-01-18 EP EP91902743A patent/EP0464220B1/en not_active Expired - Lifetime
- 1991-01-18 WO PCT/JP1991/000058 patent/WO1991011078A1/ja active IP Right Grant
- 1991-01-18 KR KR1019910701122A patent/KR100231219B1/ko not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55165574U (ja) * | 1979-05-15 | 1980-11-28 | ||
JPS5756083U (ja) * | 1980-09-17 | 1982-04-01 | ||
JPS609397U (ja) * | 1983-06-29 | 1985-01-22 | 高橋 伸介 | 前面から質の良い音を聞くヘツドホ−ン |
JPS60220698A (ja) * | 1984-04-13 | 1985-11-05 | ボ−ズ・コ−ポレ−シヨン | ヘツドホ−ン装置 |
JPS6180997A (ja) * | 1984-09-27 | 1986-04-24 | Nec Corp | 音量調節器付き拡声装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0464220A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101242677B (zh) * | 2007-02-05 | 2012-07-04 | 索尼株式会社 | 耳机设备、声音再现系统和声音再现方法 |
WO2016203117A1 (en) * | 2015-06-18 | 2016-12-22 | Hefio Oy | Earpiece for acoustical source and load modeling |
US10667031B2 (en) | 2015-06-18 | 2020-05-26 | Hefio Oy | Earpiece for acoustical source and load modeling |
Also Published As
Publication number | Publication date |
---|---|
DE69113333T2 (de) | 1996-03-07 |
DE69113333D1 (de) | 1995-11-02 |
EP0464220B1 (en) | 1995-09-27 |
EP0464220A1 (en) | 1992-01-08 |
KR100231219B1 (ko) | 1999-11-15 |
KR920702174A (ko) | 1992-08-12 |
EP0464220A4 (en) | 1992-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5276740A (en) | Earphone device | |
JP3483879B2 (ja) | イヤホン | |
KR940005040B1 (ko) | 소음 저감장치 | |
EP0412902B1 (en) | Electroacoustic device for hearing needs including noise cancellation | |
US5001763A (en) | Electroacoustic device for hearing needs including noise cancellation | |
JP4541111B2 (ja) | 骨伝導スピーカの使用方法及び骨伝導受話装置の使用方法 | |
JP2778173B2 (ja) | 騒音低減装置 | |
JP2019537367A (ja) | イヤピースマイクロホンを使用する個人用音響デバイスのオン/オフヘッド検出 | |
CN110915238B (zh) | 语音清晰度增强系统 | |
JP3112268B2 (ja) | 騒音低減装置 | |
JPH0879878A (ja) | ヘッドホン装置 | |
JP3513935B2 (ja) | 通信端末 | |
EP1093700A1 (en) | High quality open-canal sound transduction device and method | |
JPH0626328U (ja) | トランシーバ | |
CN211152190U (zh) | 一种半入耳式主动降噪耳机 | |
KR100231219B1 (ko) | 이어폰 장치 | |
JP3326958B2 (ja) | 補聴器 | |
JP2778174B2 (ja) | イヤホン装置 | |
JPS59500744A (ja) | オト−ラリンジエアル通信システム | |
JP2822224B2 (ja) | 騒音低減ヘッドホン | |
WO2004064446A1 (ja) | 携帯音響機器 | |
JP2983017B1 (ja) | 耳栓型電気音響変換装置 | |
JP3047451B2 (ja) | 音響再生装置 | |
JPS6031350Y2 (ja) | 収音再生機器システム | |
JP6931753B1 (ja) | 電気音響アクチュエータ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): DE FR GB NL |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1019910701122 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1991902743 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1991902743 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1991902743 Country of ref document: EP |