WO2000014722A1 - Adjustable quiet seat - Google Patents
Adjustable quiet seat Download PDFInfo
- Publication number
- WO2000014722A1 WO2000014722A1 PCT/GB1999/002920 GB9902920W WO0014722A1 WO 2000014722 A1 WO2000014722 A1 WO 2000014722A1 GB 9902920 W GB9902920 W GB 9902920W WO 0014722 A1 WO0014722 A1 WO 0014722A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- noise reduction
- loudspeaker
- signal
- reduction system
- microphone
- Prior art date
Links
Classifications
-
- 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
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
-
- 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
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
-
- 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
- G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
-
- 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
- G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
-
- 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
- G10K2210/3217—Collocated sensor and cancelling actuator, e.g. "virtual earth" designs
-
- 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
- G10K2210/3221—Headrests, seats or the like, for personal ANC systems
Definitions
- This invention relates to a noise reduction system for a personal seat, including reclining seats, bunks and the like.
- a noise reduction or attenuation system in the form of a loudspeaker and microphone combination attached to a personal seat adjacent to each ear of a person using the seat.
- a controller controls energisation of the loudspeaker in accordance with the sound picked up by the microphone so as to cancel noise in the region of the microphone and, thus, the user's ear adjacent to the microphone.
- the microphone is mounted at the end of a telescoping/flexible arm.
- these arms are unsightly, inhibit free movement of the user, and can even be a hazard.
- a noise reduction system in a personal seat comprises in combination a loudspeaker and microphone mounted in a fixed positional relationship adjacent to the ear of a user, the combination being adjustable relative to the user's ear.
- the loudspeaker and microphone are adjustably mounted in the body of the seat, preferably in the headrest thereof.
- the system includes two loudspeaker/microphone combinations on respective alternate sides of the seat, adjacent to each respective ear of the user.
- the system preferably includes a gain control that is readily accessible to the user when seated.
- the system includes a controller for receiving the sound signals from the microphone and for transmitting a sound attenuating signal through the amplifier to the loudspeaker, the controller also including means for identifying the noise signal to be attenuated and for generating an appropriate interference signal for attenuation of the noise signal.
- the invention therefore provides a noise reduction or attenuation system that is compact and convenient for the user to operate, that accommodates different user heights, head sizes and head positions, and that accommodates the user's preference as to the extent to which the adjustable portions of the seat enclose the user's head.
- the greater the degree of enclosure of the head the greater the noise reduction that can be achieved, but the more restricted the user's head will be.
- the further the moveable portions are spaced away from the head the more the gain of the controller has to be increased in order to increase the attenuation zone.
- the performance is not likely to be as good as when the head is more enclosed.
- the spatially-fixed relationship of the loudspeaker and microphone relative to each other means that the system's response is stable once the position of the combination relative to the user's head has been set up, optimum acoustic performance being achieved at that position by adjustment of the gain control.
- video or audio entertainment sound signals can be input to the system, to be emitted by the loudspeaker as a user-audible noise in addition to the noise-reduction signal which attenuates only other external noises.
- an automatic gain control feature can be employed to adjust the gain without the need for user control. In that circumstance, the gain would be adjusted automatically to as high a level as possible with a reasonable stability margin.
- Figure 1 shows conceptually the general arrangerhent
- Figure 2 shows the incorporation of the system components in a seat headrest
- Figure 3 shows in plan view a headrest with pivotable wings incorporating the system components
- Figure 4 shows a seat including a vertically-slidable headrest
- Figure 5 shows a circuit for the controller gain adjustment
- Figure 6 shows another circuit including filters for introduction of an audible entertainment signal.
- the head of the user is shown at 11 and, spaced from the left ear, are mounted a microphone 12 and a loudspeaker 13.
- the microphone and loudspeaker have a fixed spatial relationship to each other, the headrest as a whole being adjustable to vary the position with respect to the head of the user.
- Various adjustment systems may be utilised, as more particularly described by way of example with reference to Figures 3 and 4.
- the system components are incorporated in respective wings 31,32 each pivoted about a vertical pivot axis 33,34 to the central portion 35 of the headrest which supports the rear of the user's head.
- the wings can be independently adjusted between a position in which they are in alignment with the central portion 35, as shown in dotted outline for wing 31, and the position at right angles thereto.
- the seat has a seat base 41 and a seat back 42 to which is attached, via a track and slide arrangement 43, a headrest 44.
- the headrest can incorporate wings as shown in Figure 3. Electrical cables or other links could be incorporated or contained in the tracks.
- the gain adjustment circuit links the microphone 51 to the loudspeaker 52 via an actuator compensation- circuit 54, a gain circuit 53 and a feedback compensation circuit 55.
- the actuator compensation circuit filters the signal it receives to compensate for the characteristic of the loudspeaker or actuator.
- the gain circuit is normally a negative gain which would normally be in the range from minus 0.5 to minus 10.
- the gain circuit may include a low-pass filter or other filter to focus the noise attenuation on one part of the frequency response. With a gain of minus 1.0, the attenuation would be greatest at the microphone.
- the feedback compensation circuit removes the effect of the loudspeaker output on the signal received from the microphone. If it is desired to add an audible entertainment signal to the attenuation signal, the entertainment signal could be fed in at 56. However, a preferable arrangement is shown in Figure 6 where the entertainment signal is introduced via filters 57 and 58. These filters are typically arranged so that the sum of the microphone signal (in response to the entertainment signal) and the output of filter 57 is as small as possible.
- one or more of the circuits or filters 53,54,55,57,58 are made adaptive in response to changes in the system responses or the spectrum of the external noise to be reduced with the aim of improving the noise reduction performance of the system whilst maintaining its good performance to the entertainment signal.
- Figure 6 There are various rearrangements of Figure 6 that can be made by, for example, combining or splitting filters, but they have essentially the same effect.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002343157A CA2343157A1 (en) | 1998-09-04 | 1999-09-03 | Adjustable quiet seat |
AU56399/99A AU5639999A (en) | 1998-09-04 | 1999-09-03 | Adjustable quiet seat |
EP99943120A EP1118075A1 (en) | 1998-09-04 | 1999-09-03 | Adjustable quiet seat |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9819413.7 | 1998-09-04 | ||
GBGB9819413.7A GB9819413D0 (en) | 1998-09-04 | 1998-09-04 | Adjustable quiet seat |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000014722A1 true WO2000014722A1 (en) | 2000-03-16 |
Family
ID=10838417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/002920 WO2000014722A1 (en) | 1998-09-04 | 1999-09-03 | Adjustable quiet seat |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1118075A1 (en) |
AU (1) | AU5639999A (en) |
CA (1) | CA2343157A1 (en) |
GB (1) | GB9819413D0 (en) |
WO (1) | WO2000014722A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10241132A1 (en) * | 2002-09-03 | 2004-03-18 | Peguform Gmbh & Co. Kg I.Ins. | Headrest for vehicles, aircraft and furniture, incorporates sound transmitter, sound receiver and lighting in adjustable side wings |
WO2013182297A1 (en) * | 2012-06-06 | 2013-12-12 | Lufthansa Technik Ag | Airplane seat, audio system, and airplane |
EP2725575A1 (en) | 2012-10-23 | 2014-04-30 | Airbus Helicopters | Method and active device for dealing with noise on board a vehicle, and vehicle provided with such a device |
EP2840568A1 (en) * | 2013-08-22 | 2015-02-25 | Harman Becker Automotive Systems GmbH | Acoustically active head rest |
EP3002152A1 (en) * | 2014-10-02 | 2016-04-06 | Aisin Technical Center Of America, Inc. | Noise-cancelation apparatus for a vehicle headrest |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4042791A (en) * | 1975-02-27 | 1977-08-16 | Murriel L. Wiseman | Stereophonic head rest |
JPS60183900A (en) * | 1984-03-02 | 1985-09-19 | Mazda Motor Corp | Device for improving sound in automobile |
WO1990009655A1 (en) * | 1989-02-13 | 1990-08-23 | Group Lotus Plc | Noise suppression in vehicles |
US5133017A (en) * | 1990-04-09 | 1992-07-21 | Active Noise And Vibration Technologies, Inc. | Noise suppression system |
WO1994002935A1 (en) * | 1992-07-22 | 1994-02-03 | Sinvent A/S | Method and device for active noise reduction in a local area |
JPH07281675A (en) * | 1994-04-12 | 1995-10-27 | Fujitsu Ten Ltd | Noise controller |
-
1998
- 1998-09-04 GB GBGB9819413.7A patent/GB9819413D0/en not_active Ceased
-
1999
- 1999-09-03 EP EP99943120A patent/EP1118075A1/en not_active Withdrawn
- 1999-09-03 WO PCT/GB1999/002920 patent/WO2000014722A1/en not_active Application Discontinuation
- 1999-09-03 CA CA002343157A patent/CA2343157A1/en not_active Abandoned
- 1999-09-03 AU AU56399/99A patent/AU5639999A/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4042791A (en) * | 1975-02-27 | 1977-08-16 | Murriel L. Wiseman | Stereophonic head rest |
JPS60183900A (en) * | 1984-03-02 | 1985-09-19 | Mazda Motor Corp | Device for improving sound in automobile |
WO1990009655A1 (en) * | 1989-02-13 | 1990-08-23 | Group Lotus Plc | Noise suppression in vehicles |
US5133017A (en) * | 1990-04-09 | 1992-07-21 | Active Noise And Vibration Technologies, Inc. | Noise suppression system |
WO1994002935A1 (en) * | 1992-07-22 | 1994-02-03 | Sinvent A/S | Method and device for active noise reduction in a local area |
JPH07281675A (en) * | 1994-04-12 | 1995-10-27 | Fujitsu Ten Ltd | Noise controller |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 024 (E - 377) 30 January 1986 (1986-01-30) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29) * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10241132A1 (en) * | 2002-09-03 | 2004-03-18 | Peguform Gmbh & Co. Kg I.Ins. | Headrest for vehicles, aircraft and furniture, incorporates sound transmitter, sound receiver and lighting in adjustable side wings |
DE10241132B4 (en) * | 2002-09-03 | 2008-01-03 | Peguform Gmbh | Multi-part adjustment mechanism for a headrest |
WO2013182297A1 (en) * | 2012-06-06 | 2013-12-12 | Lufthansa Technik Ag | Airplane seat, audio system, and airplane |
DE102012209563A1 (en) * | 2012-06-06 | 2013-12-12 | Lufthansa Technik Ag | Airplane seat, audio system and airplane |
EP2725575A1 (en) | 2012-10-23 | 2014-04-30 | Airbus Helicopters | Method and active device for dealing with noise on board a vehicle, and vehicle provided with such a device |
US9305541B2 (en) | 2012-10-23 | 2016-04-05 | Airbus Helicopters | Method and an active device for treating noise on board a vehicle, and a vehicle provided with such a device |
EP2840568A1 (en) * | 2013-08-22 | 2015-02-25 | Harman Becker Automotive Systems GmbH | Acoustically active head rest |
EP3002152A1 (en) * | 2014-10-02 | 2016-04-06 | Aisin Technical Center Of America, Inc. | Noise-cancelation apparatus for a vehicle headrest |
CN105489213A (en) * | 2014-10-02 | 2016-04-13 | 爱信技术中心美国股份有限公司 | Noise-cancelation apparatus for a vehicle headrest |
Also Published As
Publication number | Publication date |
---|---|
EP1118075A1 (en) | 2001-07-25 |
GB9819413D0 (en) | 1998-10-28 |
CA2343157A1 (en) | 2000-03-16 |
AU5639999A (en) | 2000-03-27 |
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