EP0512445B1 - Benutzung des Radiosignals beim Kalibrierzyklus eines aktiven Geräuschminderungssystems - Google Patents
Benutzung des Radiosignals beim Kalibrierzyklus eines aktiven Geräuschminderungssystems Download PDFInfo
- Publication number
- EP0512445B1 EP0512445B1 EP92107482A EP92107482A EP0512445B1 EP 0512445 B1 EP0512445 B1 EP 0512445B1 EP 92107482 A EP92107482 A EP 92107482A EP 92107482 A EP92107482 A EP 92107482A EP 0512445 B1 EP0512445 B1 EP 0512445B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- calibrating
- radio signal
- entertainment
- calibration cycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000006870 function Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
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
- G10K11/1787—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
- 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
- G10K11/1781—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17817—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the error signals, i.e. secondary path
-
- 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
- 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
- G10K2210/3023—Estimation of noise, e.g. on error signals
- G10K2210/30232—Transfer functions, e.g. impulse response
-
- 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
- G10K2210/3045—Multiple acoustic inputs, single acoustic output
-
- 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
- G10K2210/3225—Radio or other sources used in ANC for transfer function estimation; Means to avoid interference between desired signals, e.g. from a car stereo, and the ANC signal
-
- 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
- G10K2210/504—Calibration
Definitions
- the invention relates to the calibration cycle for an ANC system (Active Noise Control System) with at least one Speakers and at least one microphone.
- ANC system Active Noise Control System
- the calibration cycle is for optimizing the system properties necessary. It should conveniently be every now and then be repeated. This way the complex Transfer function between speakers on the one hand and microphones on the other hand, which are then in simulated a control algorithm using an adaptive filter and the ANC system is optimally functional do. It will be convenient to repeat this from time to time, so no potential in the function of the ANC system to give away, on the other hand, the associated Noise perceived by the driver as unpleasant, which is against Repetitions of the calibration cycle speaks. If the However, changing the operating parameters of the vehicle is a renewed calibration cycle necessary and should the passengers bother as little as possible.
- WO-A-90/03026 describes a system for noise reduction described in aircraft cabins, which is specifically negative Effects of periodically working assemblies (propellers, Turbines). To calibrate the system is the transfer function between speakers and occasionally detect microphones, testifying is that calibration signals from cabin noise (Noise in the cabin) what is not covered Conditions in the motor vehicle is transferable.
- the present invention is therefore based on the object specify a calibration cycle for an ANC system, of maximum convenience in calibration and in the operational phase offers.
- This object is achieved according to the invention solved in that the uncorrelated to be transmitted Calibration signal in combination with additional signals emitted and that in determining the transfer functions the additional signals from the speakers to the microphones be eliminated mathematically.
- FIG. 1 An embodiment is shown in the figure and is in individual explained in more detail.
- the figure shows the circuit diagram for an ANC system for the calibration cycle.
- the loudspeaker 1 inputs via a filter amplifier 11 uncorrelated acoustic signal to the microphone 2 with a downstream Amplifier.
- the parallel to this path adaptive filter 3 has a complex frequency response that the calibration cycle obtained in the switch block Correlation 4 to filter setting is obtained.
- At the Summing point 5 ideally the value 0 remains.
- the System is calibrated. Should another passenger get on or other operating parameters change is a new one Calibration cycle necessary.
- With 6 is an adjustment of the radio signal to the conditions of the subsequent network featured. It can be a level or Act time adjustment.
- the logic circuit 7 which can be a summer or modulator or multiplexer the noise signal is fed to the adapted radio signal.
- Reference numeral 8 shows a summer. Because the input signal 9 on the correlation circuit 4 essentially consists of two components, it is the adjusted at 10 Radio signal supplied for elimination.
- the entertainment signal can be used as a calibration signal or an uncorrelated signal that corresponds to the entertainment signal is mixed. It can be the entertainment signal be added additively or multiplicatively.
- the calibration signal can be completely or partially from the entertainment signal be masked. A Dirac shock can also be used as a calibration signal be used.
- the entertainment signal can also be a special piece of music played on the car radio or via the cassette recorder or via a CD player or a memory block is played.
- the radio signal may be a different sound or sound Concealment of the calibration signal used by its properties are less disturbing than the calibration signal is felt.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Description
Claims (6)
- Verfahren für einen Kalibrierzyklus für ein ANC-System (Active Noise Control System) mit mindestens einem Lautsprecher (1) und mindestens einem Mikrofon (2), dadurch gekennzeichnet, daß ein zu übertragendes unkorreliertes Kalibriersignal in Kombination mit Zusatzsignalen abgestrahlt wird und daß bei der Bestimmung der Übertragungsfunktionen von den Lautsprechern (1) zu den Mikrofonen (2) die Zusatzsignale rechnerisch eliminiert werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Kalibriersignal ein Entertainmentsignal benutzt wird, welches insbesondere ein Radiosignal oder ein Signal von einem Kassettenrecorder oder von einem CD-Spieler oder von einem Speicherbaustein ist.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Kalibriersignal ein spezielles Musikstück oder eine Klangfolge ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Kalibriersignal einem Entertainmentsignal, insbesondere einem Radiosignal oder einem Signal von einem Kassettenrecorder oder von einem CD-Spieler, zugemischt wird.
- Verfahren nach Anspruche 4, dadurch gekennzeichnet, daß das Kalibriersignal vom Entertainmentsignal vollständig oder zum Teil maskiert ist.
- Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß als Kalibriersignal ein Diracstoß verwendet wird, der im Entertainmentsignal eingemischt ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4115009A DE4115009A1 (de) | 1991-05-08 | 1991-05-08 | Benutzung des radiosignals beim kalibrierzyklus eines aktiven geraeuschminderungssystems |
| DE4115009 | 1991-05-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0512445A2 EP0512445A2 (de) | 1992-11-11 |
| EP0512445A3 EP0512445A3 (en) | 1993-09-01 |
| EP0512445B1 true EP0512445B1 (de) | 1998-04-15 |
Family
ID=6431233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92107482A Expired - Lifetime EP0512445B1 (de) | 1991-05-08 | 1992-05-02 | Benutzung des Radiosignals beim Kalibrierzyklus eines aktiven Geräuschminderungssystems |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0512445B1 (de) |
| DE (2) | DE4115009A1 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3410129B2 (ja) * | 1992-12-25 | 2003-05-26 | 富士重工業株式会社 | 車室内騒音低減装置 |
| GB2274757A (en) * | 1993-01-28 | 1994-08-03 | Secr Defence | Ear defenders employing active noise control |
| WO1994024662A1 (en) * | 1993-04-21 | 1994-10-27 | Sri International | Method of calculating filter weights for compression wave cancellation systems |
| DE4315000A1 (de) * | 1993-05-06 | 1994-11-10 | Opel Adam Ag | Geräuschkompensierte Freisprechanlage in Kraftfahrzeugen |
| AU6786394A (en) * | 1993-06-11 | 1995-01-03 | Caterpillar Inc. | Error path transfer function modelling in active noise cancellation |
| DE19639216A1 (de) * | 1996-09-25 | 1998-03-26 | Thomson Brandt Gmbh | Wiedergabe- oder Aufzeichnungsgerät zum Lesen oder Bespielen eines optischen Aufzeichnungsträgers mit einer Schaltung zum Unterdrücken von Jaulgeräuschen sowie Verfahren dazu |
| ID19364A (id) * | 1996-09-25 | 1998-07-02 | Thomson Brandt Gmbh | Mereproduksi atau alat perekaman untuk mereproduksi, atau perekam, suatu medium perekam optikal |
| FR2771541B1 (fr) * | 1997-11-21 | 2000-10-20 | Jean Claude Decaux | Procede et dispositif d'insonorisation active |
| US7139400B2 (en) * | 2002-04-22 | 2006-11-21 | Siemens Vdo Automotive, Inc. | Microphone calibration for active noise control system |
| EP1770685A1 (de) * | 2005-10-03 | 2007-04-04 | Maysound ApS | System zur Verminderung der hörbaren Wahrnehmung des Schallstörpegels eines Menschen. |
| DE102015214134A1 (de) * | 2015-07-27 | 2017-02-02 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Regelungsvorrichtung zur aktiven Schallunterdrückung in einem Kraftfahrzeug |
| DE102016001593B4 (de) * | 2016-02-11 | 2024-07-25 | Audi Ag | Verfahren zum Erzeugen eines Gegenschalls für eine Geräuschminderung in einem Kraftfahrzeug und Kraftfahrzeug |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677676A (en) * | 1986-02-11 | 1987-06-30 | Nelson Industries, Inc. | Active attenuation system with on-line modeling of speaker, error path and feedback pack |
| GB8820922D0 (en) * | 1988-09-06 | 1988-10-05 | Topexpress Ltd | Noise reduction in vehicles cabins |
| GB8903201D0 (en) * | 1989-02-13 | 1989-03-30 | Lotus Group Plc | Noise suppression in vehicles |
| GB8908980D0 (en) * | 1989-04-20 | 1989-06-07 | Lotus Group Plc | Treatment of noise in vehicles |
| JPH0834647B2 (ja) * | 1990-06-11 | 1996-03-29 | 松下電器産業株式会社 | 消音装置 |
-
1991
- 1991-05-08 DE DE4115009A patent/DE4115009A1/de not_active Withdrawn
-
1992
- 1992-05-02 DE DE59209279T patent/DE59209279D1/de not_active Expired - Lifetime
- 1992-05-02 EP EP92107482A patent/EP0512445B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0512445A3 (en) | 1993-09-01 |
| DE4115009A1 (de) | 1992-11-12 |
| EP0512445A2 (de) | 1992-11-11 |
| DE59209279D1 (de) | 1998-05-20 |
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