US3796840A - Four-channel headphone - Google Patents

Four-channel headphone Download PDF

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Publication number
US3796840A
US3796840A US00204148A US3796840DA US3796840A US 3796840 A US3796840 A US 3796840A US 00204148 A US00204148 A US 00204148A US 3796840D A US3796840D A US 3796840DA US 3796840 A US3796840 A US 3796840A
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United States
Prior art keywords
speaker
headphone
listener
channel
phase
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Expired - Lifetime
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US00204148A
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English (en)
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K Ohta
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Victor Company of Japan Ltd
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Victor Company of Japan Ltd
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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
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • 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
    • H04R1/1008—Earpieces of the supra-aural or circum-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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/022—Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication
    • H04R5/0335—Earpiece support, e.g. headbands or neckrests

Definitions

  • ABSTRACT A four-Channel headphone comprises a pair of left and right headphone body casings, a front channel speaker and a rear channel speaker respectively provided in each casing and electrical signal supplying means for supplying rear channel signals to the rear channel speakers with shifted phase.
  • the signals shifted in phase are reproduced and sounded from the rear channel speakers in the headphone body casings, the sounds produce a panoramic surrounding sound effect for a listener who uses the four-channel headphone.
  • the invention relates to a four-channel headphone and, more particularly, to a four-channel headphone in which four speakers respectively corresponding to each of four channels are mounted for producing a panoramic surrounding four-channel sound effect which gives a listener an impression that he is entirely surrounded by sound.
  • a reproducing apparatus including a four-channel tape or a four-channel record for reproducing a sound field which closely resembles to the original sound field.
  • a reproducing apparatus for four-channel system The most prevailing speaker arrangement is a so-called 22 system in which speakers for first, second, third and fourth channels are respectively disposed at left front, left rear, right front and right rear of the listener.
  • four-channel signals have a sound image orientation corresponding to a sound source and different phases, levels and information contents in connection with reproducibility of a sound field.
  • a listener placed in the center of this speakerarrangement has an impression that he exists at the center of the sound field surrounded by sound all around, due to a sound field effect produced by sound planes formed between respective speakers which reproduce and sound the fourchannel signals.
  • a four-channel headphone has been proposed.
  • This headphone has four speakers in its two headphone bodies, namelytwo in the left headphone body and two in the right one and the respective speakers are adapted to reproduce four-channel signals.
  • the four-channel headphone system is different from the system in which the speakers are arranged in a large space in a room to form a sound field in a room space, because in the headphone system both ears of the listener are respectively in tight contact with the left and right headphone bodies and each ear receives only sound produced in the space of either left or right headphone body.
  • the sounds of the first and second channels are mixed together in the left headphone body and reaches only the left ear of the listener whereas the sounds of the third and fourth channels are mixed in the right headphone and reaches only theright ear of the listener.
  • the sounds of the left side channel (the first and second channels) and those of the right side channel (the third and fourth channels) are not mixed in the air and neither the sounds of the left side channels nor those of the right side channels reach the listeners ear on the opposite side.
  • the headphone essentially has a limitation in its size and the two speakers mounted in either headphone body are relatively close to each other. This prevents the listener from having impresssion of spread of sound between the two speakers.
  • the prior art four-channel headphone is disadvantageous in that the left and right headphone bodies which have two speakers respectively reproduce sounds of four different channels but the headphone can only give the listener a binaural effect produced by the sound from the left headphone body and the sound from the right headphone body, and cannot give the listener a panoramic surrounding sound effect which gives the listener an impression that he is really and entirely surrounded by the sound.
  • the conventional headphone is disadvantageous in that the listener has a feeling that the sounds concentrate on his occipital region which is quite unpleasant to him.
  • the inventor of the present invention has discovered that if the signals which should be reproduced and sounded from the rear channel speakers, i.e., the second and the fourth channel speakers, of the above described four-channel headphone have been shifted in phase from the second and fourth channel signals which were originally to be reproduced, the listener using the headphone can obtain a truly effective panoramic surrounding sound effect. The reason for the above effect is theoretically quite unclear.
  • the effect is due to the construction of the headphone itself according to which the sounds of the first and second channels and those of the third and fourth channels respectively reach the left ear and the right ear separately, since in case in the room disposed with four-channel speakers the signals of the second and fourth channels are reproduced and sounded with their phases shifted from the signals of the second and fourth channels which were originally to be reproduced, it only gives the listener an unpleasant feeling, whereas the above described effect is produced in the headphone.
  • Another object of the invention is to provide a fourchannel headphone which produces a panoramic surrounding sound field effect and gives a listener an impression of spread or expanse of sound.
  • a further object of the invention is to provide a fourchannel headphone in which each pair of the speakers provided in each of the left and right headphone bodies reproduce and sound signals which have a phase difference between-each-other.
  • the listener has an impression that he is surrounded by sounds and has a feeling of reality which is much superior to the binaural effect produced by the prior art headphone. Further, the listener feels a spread of sound. Furthermore, he has no unpleasant feeling that the sound concentrates on his occipital region.
  • FIG. 1 is a schematic plan view of the speaker arrangement of the four-channel headphone according to the invention shown in its state in use;
  • FIG. 2 is an elevational view showing one embodiment of the four-channel headphone according to the invention.
  • FIG. 3 is a side view of the four-channel headphone shown in FIG. 2 taken along the line III-Ill;
  • FIG. 4 is a left side view of the four-channel headphone shown in FIG. 2;
  • FIG. 5 is a sectional plan view of the headphone taken along the line VV of FIG. 4;
  • FIG. 6 is a circuit diagram of one embodiment of the electric circuit of the four-channel headphone according to the invention.
  • FIG. 7 is a circuit diagram of another embodiment of the electric circuit of the four-channel headphone according to the invention.
  • FIG. 8 is a diagram showing a frequency-phase shift characteristic.
  • FIG. 1 shows a schematic plan view of the fourchannel headphone according to the invention shown in its state in use.
  • a four-channel headphone 10 generally comprises a left headphone body 11 and a right headphone body 12.
  • a first channel speaker 14 and a second channel speaker 15 mounted at positions at which a line connecting the centers of the two speakers runs substantially parallel to a line connecting through the front and back of the listener's head.
  • a third channel speaker 18 and a fourth channel speaker 19 are arranged in a casing 17 ofthe right headphone body 12 at positions at which a line connecting the centers of the two speakers runs substantially parallel to a line connecting the front and back of the listeners head.
  • Signals which are applied to these first to fourth channel speakers 14, 15, 18, 19 are the same first to fourth channel signals as are applied to the conventional 22 system speakers disposed at left front, left rear, right front and right rear positions to the listener.
  • the casings 13 and 17 are respectively provided in the middle of their outside surface with phase shifting slide switch knobs 20 and 21 to be described later.
  • FIGS. 2 to 5 One embodiment of a concrete construction of the four-channel headphone according to the invention with the above described speaker arrangement is illustrated in FIGS. 2 to 5. Throughout these figures, illustration is made only for the left headphone body 11. As to the right headphone body 12, description of a concrete construction thereof is omitted because the right headphone body 12 has exactly the same construction as the left headphone body 11 except only that the first and second channel speakers 14 and 15 are replaced by thethird and fourth speakers 18 and 19.
  • the left and right headphone bodies 11 and 12 are connected with each other by means of a curved and elastic support plate 32 which is secured at either end thereof to holding frames and 31 which, in turn, are respectively pivotally supported on the casings 13 and 14.
  • the support plate 32 is covered with a head pad 33 made of a soft material.
  • An electrical signal transmitting code 34 to be connected to a headphone jack of the reproducing apparatus is connected in the lower portion of the casing 13 ofthe left headphone body 11.
  • a code 35 for transmitting the third and fourth channel signals extends from the upper portion of the casing 13 through the head pad 33 and is connected to the upper portion of the casing 14 of the right headphone body 12.
  • the casing 13 and 14 are both provided with car pads 36 and 37 made of a soft material at the surfaces which contact the listener's ears and portions of the head around the ears.
  • the ear pad 36 is of an annular shape with openings 38 which are large enough to receive the listeners ears.
  • the speakers 14 and 15 respectively generally consist of magnetic poles 39 and 40, magnets 41 and 42 and diaphragms 43 and 44 which are respectively mounted on a unit mounting plate 45 with an angle of less than 180 relative to each other as shown in cross section in FIG. 5.
  • the angle made between planes which are vertical to the central axes of the magnets 41 and 42 of the speakers 14 and I5' is and the angle made between the directions of the center of radiation of sound which are equal to the ccntral axes of the magnets 41 and 42 is 30.
  • the speakers 14 and 15 are disposed at positions at which the line connecting the centers ofthe two speakers runs parallel to the line connecting the front and back of the listeners head as shown in the side view of FIGS. 3 and 4.
  • the front surfaces of the diaphragms 43 and 44 are covered with an acoustic planes 46 made of a punching metal.
  • the speakers 14 and 15 are separated from each other by partitions 47, 47 so that the sounds will not leak into the other speaker side on the rear side of the speakers 14 and 15 (on the side of the magnetic poles and the magnets). Between the two partitions 47, 47, there is provided a phase shifting slide switch 48 with its knob 20 exposed outside of the casing 13.
  • Terminals 60, 61, 62 and 63 for the first to fourth speakers 14, 15, 18 and 19 are respectively connected to amplifiers of the first to fourth channels in the reproducing apparatus through the code 34.
  • the speakers 14 and 18 are directly connected to the terminals 60 and 62.
  • the speakers 15 and 19 of the rear channels, i.e., the second and fourth channels are connected to the terminals 61 and 63 through phase shifting switches 48 and 49 respectively provided in the casings 13 and 17.
  • the speakers 15 and 19 are connected to the terminals 61 and 63 in the same phase with the original phase. Accordingly, the second and fourth channel signals are reproduced and sounded from the speakers 15 and 19 in their original phase.
  • the knobs 20 and 21 are slid to connect the switches 48 and 49 on the side of contacts h, the speakers 15 and 19 are connected to the terminals 61 and 63 in opposite phase. Accordingly, the second and fourth channel signals are reproduced and sounded in a phase opposite to the original phase.
  • the second and fourth channel signals are respectively reproduced and sounded from the second and fourth channel speakers 15 and 19 of the headphone bodies 11 and 12 in opposite phase to the original phase of the second and fourth channel signals, i.e., with a phase difference of
  • the second and fourth channel signals have phases (normally, phases having slight phase differences iAO) which are related with the first and third channel signals, so that the reproduced sounds of the second and fourth channels have a large phase difference (180 :tAO) relative to the reproduced sounds of the first and third channels.
  • the panoramic surrounding sound effect which gives him an impression that he is surrounded by the sound is'produced.
  • the sound of each channel in the four-channel system is different from one another and the signals of the rear channels (the second and fourth channels) seldom coincide in phase and level with the signals of the front channels (the first and third channels). Accordingly, the sounds of the front channels are not greately cancelled by the sounds of the rear channels.
  • the changing of phase between an original phase and an opposite phase is effected by means of the phase shifting switches 48 and 49.
  • the speakers and 19 may be fixedly connected to the terminals 61 and 63 in opposite polarity, so that the signals may be reproduced in opposite phase to the original phase.
  • F IG. 7 shows a circuit diagram of the second embodiment of the electric circuit of the four-channel speakers according to the invention.
  • the phases of the second and fourth channel signals reproduced and sounded are changed by 180 to make them opposite phase to the original phases
  • the above described surrounding effect is produced.
  • This construction has a problem that the listener may sometimes have an unpleasant feeling due to unnaturalness accompanying such surrounding effect.
  • the first and the second (or the third and the fourth) channel signals hap-v pen to completely in the same phase and same level, the sound of the first channel signal will be cancelled by the sound of the second channel signal which is in opposite phase to the sound of the first channel.
  • the present invention is directed to settle these problems by variably adjusting the phase shift so that a natural surrounding sound effect will be produced in accordance with phases of the signals.
  • the speakers 14 and 18 for the front channels are directly connected to the terminals 60 and 62, as in the first embodiment previously described.
  • the speakers 15 and 19 for the rear channels, i.e., the second and the fourth channels, are respectively connected to the terminals 61 and 63 through phase adjusting circuits 70 and 71.
  • the phase adjusting circuits 70 and 71 generally consist of transformers 72 and 73, variable resistors 74 and 75 and capacitors 76 and 77.
  • One end of a voice coil of the speaker 15 is connected to a connecting point of the variable resistor 74 and the capacitor 76.
  • One end of a voice coil of the speaker 19 is likewise connected to a connecting point of the variable resistor 75 and the capacitor 77.
  • the other ends of the voice coils of the speakers 15 and 19 are respectively connected to one ends of primary windings and intermediate taps 78 and 79 of the secondary windings of the transformers 72 and 73.
  • slide knobs of the variable resistors 74 and 75 are provided on the casings 13 and 17 of the headphone bodies 11 and 12 instead of the switch knobs 20 and 21 employed in the first embodiment.
  • the phase shift of the signals applied from the terminals 61 and 63 to the speakers 15 and 19 through the phase adjusting circuits and 71 and reproduced and sounded from these speakers 15 and 19 varies with frequency.
  • the phase shift is small in low frequencies whereas it is large in high frequencies, amounting nearly to 180.
  • a frequency f at which the phase shift is 90 is represented by equation f 1/21rCR, where C is capacitance value of the capacitors 76 and 77 and R is resistance value of the variable resistors 74 and 75.
  • the value of the frequency f is changed by changing the value of resistance of the variable resistors 74 and 75 and the characteristic shown by a full line in FIG. 8 varies as shown by a broken line and a chain line in the same figure. If the frequency f is selected at about 200 Hz to 1,000 I-Iz, an excellent effect is produced with respect to a sound image orientation and a sound field reproducibility.
  • a natural panoramic surrounding sound effect can be obtained. Moreover, the cancellation of the level in low frequencies can be avoided.
  • the amount of phase shift varies in accordance with frequency.
  • the invention is not limited to this but a constant amount of phase shift may be maintained over the whole range of frequency or the amount of phase shift may be made variable over the whole range of frequency.
  • a four-channel headphone comprising:
  • a a pair of left and right headphone body casings respectively applied to the left and right ears of a listener;
  • first andsecond speakers disposed in said left headphone body casing so that when said headphone is applied to the ears of the listener said first speaker is to the front of the left ear of the listener and said second speaker is to the rear of the left ear of the listener;
  • third and fourth speakers disposed in said right headphone body casing so that when said headphone is applied to the ears of the listener said third speaker is to the front of the right ear of the listener and said fourth speaker is to the rear of the right ear of the listener;
  • first switch means mounted in said left head-phone body casing and being set to selectively reverse connections, said first switch means having input terminals and output terminals, said output terminals being electrically connected to said second speaker;
  • second switch means mounted in said right headphone body casing and being set'to selectively reverse connections, said second switch means having input terminals and output terminals, said output terminals of said second switch means being electrically connected to said fourth speaker;
  • said first switch means comprises a double pole double throw switch, the switch knob of which is exposed outside of said left headphone body casing
  • said second switch means comprises a double pole double throw switch, the switch knob of which is exposed outside of said right headphone body casing.
  • the four-channel headphone as defined in claim 2 which further comprises two spaced partitions provided in said left headphone body casing for separating in space said first speaker from said second speaker,
  • said first switch means being provided between said two spaced partitions, and two spaced partitions provided in said right headphone body casing for separating in space said third speaker from said fourth speaker, said second switch means being provided between said two spaced partitions.
  • a four-channel headphone comprising:
  • a a pair of left and right headphone body casings respectively applied to the left and right ears of a listener;
  • first and second speakers disposed in said left headphone body casing so that when said headphone is applied to the ears of the listener said first speaker is to the front of the left ear of the listener and said second speaker is to the rear of the left ear of the listener;
  • third and fourth speakers disposed in the right headphone body casing so that when said headphone is applied to the ears of the listener said third speaker is to the front of the right ear of the listener and said fourth speaker is to the rear of the right ear of the listener;
  • first phase-shifting means mounted in said left headphone body casing for shifting in phase a signal which is applied to said first phase-shifting means
  • second phase-shifting means mounted in said right headphone body casing for shifting in phase a signal which is applied to said second phase-shifting means
  • fourth means for supplying through said second phase-shifting means to said fourth speaker a fourth channel signal which corresponds to a sound emanating from the rear and right of the listener.
  • each of the first and second phase-shifting means comprises a transformer, a series combination of a variable resistor and a capacitor, which series combination is connected across the secondary winding of said transformer, said secondary winding having an intermediate tap, said second speaker and said fourth speaker being respectively connected between said intermediate tap and the connecting point of said variable resistor and said capacitor, and wherein the second and fourth means supply respectively said second channel signal and said fourth channel signal to the primary winding of said transformer.
  • the four-channel headphone as defined in claim 6 which further comprises two spaced partitions provided in said left headphone body casing for separating in space said first speaker from said second speaker, said first phase-shifting means being provided between said two spaced partitions, and two spaced partitions provided in said right headphone body casing for separating in space said third speaker from said fourth speaker, said second phaseshifting means being provided between said two spaced partitions.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
US00204148A 1970-12-05 1971-12-02 Four-channel headphone Expired - Lifetime US3796840A (en)

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JP45107810A JPS4939002B1 (zh) 1970-12-05 1970-12-05

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US00204148A Expired - Lifetime US3796840A (en) 1970-12-05 1971-12-02 Four-channel headphone

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Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900707A (en) * 1973-06-06 1975-08-19 Hear Muffs Speaker apparatus
US3927262A (en) * 1973-06-12 1975-12-16 Neckermann Versand Kgaa Headset for reproducing quadraphonically recorded information
US3984636A (en) * 1975-03-06 1976-10-05 Koss Corporation Quadraphonic headphone with ambience programmer
US3984885A (en) * 1974-03-15 1976-10-12 Matsushita Electric Industrial Co., Ltd. 4-Channel headphones
US4245136A (en) * 1980-08-08 1981-01-13 Krauel Jr Robert W Monitor ampliphones
US4338489A (en) * 1979-02-12 1982-07-06 Akg Akustische U. Kino-Gerate Gesellschaft M.B.H. Headphone construction
US5675658A (en) * 1995-07-27 1997-10-07 Brittain; Thomas Paige Active noise reduction headset
US6038330A (en) * 1998-02-20 2000-03-14 Meucci, Jr.; Robert James Virtual sound headset and method for simulating spatial sound
US6104819A (en) * 1997-06-02 2000-08-15 Gateway 2000, Inc. Combination speaker and earphone apparatus
US20010031062A1 (en) * 2000-02-02 2001-10-18 Kenichi Terai Headphone system
US6356644B1 (en) * 1998-02-20 2002-03-12 Sony Corporation Earphone (surround sound) speaker
GB2367705A (en) * 2000-06-02 2002-04-10 Hunting Eng Ltd Multiple audio-transducer earpiece for headphones
DE4236765C2 (de) * 1991-10-30 2002-05-16 Florian M Koenig Stereokopfhörer zur Vorne-Lokalisation von Hörereignissen und Verfahren zum Optimieren der Lage und Ausrichtung der Schalwandler des Stereokopfhöres
US6817440B1 (en) * 2000-02-26 2004-11-16 Mm Gear Co., Ltd. Multi-channel headphones
US7155025B1 (en) 2002-08-30 2006-12-26 Weffer Sergio W Surround sound headphone system
US20070177748A1 (en) * 2006-01-27 2007-08-02 Iatec Limited Earphone structure
US20070280488A1 (en) * 2006-06-01 2007-12-06 Kuo Chia-Hung Electronic apparatus with earphones also capable of serving as speakers
US20120308067A1 (en) * 2011-06-01 2012-12-06 Wai Hung Ip Headphone 3D Hearing technology
US20140016803A1 (en) * 2012-07-12 2014-01-16 Paul G. Puskarich Earphones with Ear Presence Sensors
US20140072153A1 (en) * 2012-09-13 2014-03-13 Eastern Technologies Holding Limited Simulated sound field earphone
US9049508B2 (en) 2012-11-29 2015-06-02 Apple Inc. Earphones with cable orientation sensors
US9344792B2 (en) 2012-11-29 2016-05-17 Apple Inc. Ear presence detection in noise cancelling earphones
US9357282B2 (en) 2011-03-31 2016-05-31 Nanyang Technological University Listening device and accompanying signal processing method
USD797075S1 (en) * 2016-05-20 2017-09-12 Mauro New Media, Inc. Headphone
USD797074S1 (en) * 2016-02-02 2017-09-12 Halo Neuro, Inc. Biointerface headset
US9838811B2 (en) 2012-11-29 2017-12-05 Apple Inc. Electronic devices and accessories with media streaming control features
US20180048960A1 (en) * 2016-06-06 2018-02-15 Bose Corporation Acoustic Device
US9942642B2 (en) 2011-06-01 2018-04-10 Apple Inc. Controlling operation of a media device based upon whether a presentation device is currently being worn by a user
US20190069070A1 (en) * 2017-08-31 2019-02-28 Bose Corporation Wearable personal acoustic device having outloud and private operational modes
USD848396S1 (en) * 2017-11-02 2019-05-14 Honeywell International Inc. Noise monitoring headset
USD859355S1 (en) * 2017-12-28 2019-09-10 Peilin Hu Headphones
USD864901S1 (en) * 2018-05-18 2019-10-29 Gentex Corporation Headset
US10694275B2 (en) * 2018-09-25 2020-06-23 Htc Corporation Headphone
WO2022157251A3 (de) * 2021-01-21 2022-10-27 Kaetel Systems Gmbh Am kopf tragbarer schallerzeuger, signalprozessor und verfahren zum betreiben eines schallerzeugers oder eines signalprozessors

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900707A (en) * 1973-06-06 1975-08-19 Hear Muffs Speaker apparatus
US3927262A (en) * 1973-06-12 1975-12-16 Neckermann Versand Kgaa Headset for reproducing quadraphonically recorded information
US3984885A (en) * 1974-03-15 1976-10-12 Matsushita Electric Industrial Co., Ltd. 4-Channel headphones
US3984636A (en) * 1975-03-06 1976-10-05 Koss Corporation Quadraphonic headphone with ambience programmer
US4338489A (en) * 1979-02-12 1982-07-06 Akg Akustische U. Kino-Gerate Gesellschaft M.B.H. Headphone construction
US4245136A (en) * 1980-08-08 1981-01-13 Krauel Jr Robert W Monitor ampliphones
DE4236765C2 (de) * 1991-10-30 2002-05-16 Florian M Koenig Stereokopfhörer zur Vorne-Lokalisation von Hörereignissen und Verfahren zum Optimieren der Lage und Ausrichtung der Schalwandler des Stereokopfhöres
US5675658A (en) * 1995-07-27 1997-10-07 Brittain; Thomas Paige Active noise reduction headset
US6104819A (en) * 1997-06-02 2000-08-15 Gateway 2000, Inc. Combination speaker and earphone apparatus
US6356644B1 (en) * 1998-02-20 2002-03-12 Sony Corporation Earphone (surround sound) speaker
US6038330A (en) * 1998-02-20 2000-03-14 Meucci, Jr.; Robert James Virtual sound headset and method for simulating spatial sound
US20010031062A1 (en) * 2000-02-02 2001-10-18 Kenichi Terai Headphone system
US6944309B2 (en) 2000-02-02 2005-09-13 Matsushita Electric Industrial Co., Ltd. Headphone system
US6817440B1 (en) * 2000-02-26 2004-11-16 Mm Gear Co., Ltd. Multi-channel headphones
GB2367705A (en) * 2000-06-02 2002-04-10 Hunting Eng Ltd Multiple audio-transducer earpiece for headphones
US7155025B1 (en) 2002-08-30 2006-12-26 Weffer Sergio W Surround sound headphone system
US20070177748A1 (en) * 2006-01-27 2007-08-02 Iatec Limited Earphone structure
US20070280488A1 (en) * 2006-06-01 2007-12-06 Kuo Chia-Hung Electronic apparatus with earphones also capable of serving as speakers
US9357282B2 (en) 2011-03-31 2016-05-31 Nanyang Technological University Listening device and accompanying signal processing method
US20120308067A1 (en) * 2011-06-01 2012-12-06 Wai Hung Ip Headphone 3D Hearing technology
US10390125B2 (en) 2011-06-01 2019-08-20 Apple Inc. Controlling operation of a media device based upon whether a presentation device is currently being worn by a user
US9942642B2 (en) 2011-06-01 2018-04-10 Apple Inc. Controlling operation of a media device based upon whether a presentation device is currently being worn by a user
US20140016803A1 (en) * 2012-07-12 2014-01-16 Paul G. Puskarich Earphones with Ear Presence Sensors
US9648409B2 (en) * 2012-07-12 2017-05-09 Apple Inc. Earphones with ear presence sensors
US9986353B2 (en) 2012-07-12 2018-05-29 Apple Inc. Earphones with ear presence sensors
US20140072153A1 (en) * 2012-09-13 2014-03-13 Eastern Technologies Holding Limited Simulated sound field earphone
US9344792B2 (en) 2012-11-29 2016-05-17 Apple Inc. Ear presence detection in noise cancelling earphones
US9049508B2 (en) 2012-11-29 2015-06-02 Apple Inc. Earphones with cable orientation sensors
US9838811B2 (en) 2012-11-29 2017-12-05 Apple Inc. Electronic devices and accessories with media streaming control features
USD855033S1 (en) 2016-02-02 2019-07-30 Halo Neuro, Inc. Biointerface headset
USD797074S1 (en) * 2016-02-02 2017-09-12 Halo Neuro, Inc. Biointerface headset
USD797075S1 (en) * 2016-05-20 2017-09-12 Mauro New Media, Inc. Headphone
CN109314810A (zh) * 2016-06-06 2019-02-05 伯斯有限公司 声学设备
US10231052B2 (en) * 2016-06-06 2019-03-12 Bose Corporation Acoustic device
US20180048960A1 (en) * 2016-06-06 2018-02-15 Bose Corporation Acoustic Device
CN109314810B (zh) * 2016-06-06 2020-03-10 伯斯有限公司 声学设备
US20190069070A1 (en) * 2017-08-31 2019-02-28 Bose Corporation Wearable personal acoustic device having outloud and private operational modes
US10412480B2 (en) * 2017-08-31 2019-09-10 Bose Corporation Wearable personal acoustic device having outloud and private operational modes
US10959009B2 (en) 2017-08-31 2021-03-23 Bose Corporation Wearable personal acoustic device having outloud and private operational modes
USD848396S1 (en) * 2017-11-02 2019-05-14 Honeywell International Inc. Noise monitoring headset
USD859355S1 (en) * 2017-12-28 2019-09-10 Peilin Hu Headphones
USD864901S1 (en) * 2018-05-18 2019-10-29 Gentex Corporation Headset
US10694275B2 (en) * 2018-09-25 2020-06-23 Htc Corporation Headphone
WO2022157251A3 (de) * 2021-01-21 2022-10-27 Kaetel Systems Gmbh Am kopf tragbarer schallerzeuger, signalprozessor und verfahren zum betreiben eines schallerzeugers oder eines signalprozessors

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