EP0779014B1 - Device for controlling the volume of a car radio dependently upon the ambient noise - Google Patents
Device for controlling the volume of a car radio dependently upon the ambient noise Download PDFInfo
- Publication number
- EP0779014B1 EP0779014B1 EP95928425A EP95928425A EP0779014B1 EP 0779014 B1 EP0779014 B1 EP 0779014B1 EP 95928425 A EP95928425 A EP 95928425A EP 95928425 A EP95928425 A EP 95928425A EP 0779014 B1 EP0779014 B1 EP 0779014B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- car radio
- acceleration sensor
- processing circuit
- volume
- 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
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
Definitions
- the invention relates to a device for driving noise Control the volume of a car radio.
- EP-A-O 246 772 describes an arrangement for damping Body vibrations in motor vehicles known, wherein the vibrations z. B. by driving over bumps caused.
- the body vibrations are detected by means of an acceleration sensor and the measurement signal is evaluated in a computing unit.
- the Suspension of the vehicle are dependent on the Measuring signal adjusted so that body vibrations be reduced.
- the object of the present invention is for a Control of the volume of a vehicle based on driving noise Car radios the derivation of a driving noise dependent Signals to improve that measures to Removal of useful signal components from the control signals spare.
- the invention is based on the knowledge that driving noises mainly as structure-borne noise in the interior (Passenger cabin) of the motor vehicle are transmitted. This is especially the engine noise and that Tire rolling noise. Measures to remove the Useful signal portion from the with the help of the acceleration sensor obtained signal are in the invention Setup not required.
- the inventive device has the further advantage that no further installations in the motor vehicle itself are required - such as laying Lines and mounting a microphone.
- the acceleration sensor rigid with the Car radio housing is connected.
- An advantageous one Design of the device according to the invention exists in that the acceleration sensor has a signal bandwidth of about 1 kHz. This makes the whole one Masking required spectral range of structure-borne noise covered and it can be available on the market Acceleration sensors are used, such as the acceleration sensor type ADXL50 from Analog Devices.
- the device according to the invention also in principle suitable for frequency-independent volume control is, better results with a frequency dependent Masking achieved for which according to a training of device according to the invention is provided that a Output of the acceleration sensor via a Signal processing circuit with a predetermined Algorithm and the audio signals generated by the car radio a multi-channel equalizer can be fed, the outputs with control inputs of the signal processing circuit and with Inputs from power amplifiers are connected.
- Fig. 1 shows schematically a car with a body 1, front wheels 2, rear wheels 3, an engine 4 and one Car radio 5, the speakers 6, 7 only hinted at are. With double arrows are each on the wheels acting forces and the outgoing from the engine on the Body forces acting illustrated. One notices, that vertical forces are decisive Share in structure-borne noise. An acceleration sensor 8 is therefore arranged so that it is vertical Acceleration detected.
- the acceleration sensor 8 is on the Base plate of the car radio 5 arranged. He can therefore in simply connected to the circuit of the car radio will.
- Fig. 3 shows a block diagram of an inventive Facility where the not specifically for the Invention adapted parts of the car radio, such as for example receiving part, if necessary Cassette player, stereo decoder and audio amplifier in one Circuit 11 are summarized as an NF source.
- the audio signals L and R one Multi-channel equalizer 12 supplied with four outputs four power amplifiers 13, 14, 15, 16 for four loudspeakers 17, 18, 19, 20 is connected.
- LF and RF mean the signals for the left and right front speakers, while the LR and RR signals are the left signals Label rear and right rear speakers.
- the Power stages 14 and 15 invert the output signal, which is indicated by a minus sign.
- the output signal of the acceleration sensor 8 becomes one Signal processing circuit 21 supplied by the Output signals of the multi-channel equalizer 12 is controllable.
- the signal processing circuit 21 processes this Output signal from the acceleration sensor and the Output signals of the multi-channel equalizer with known ones Algorithms.
- the output signal of the Signal processing circuit 21 then becomes the multi-channel equalizer 12 forwarded to in several different Frequency bands the amplification of the audio signals L and R to Taxes.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Vibration Prevention Devices (AREA)
Description
Die Erfindung betrifft eine Einrichtung zur fahrgeräuschabhängigen Steuerung der Lautstärke eines Autoradios.The invention relates to a device for driving noise Control the volume of a car radio.
Der Geräuschpegel im Innern eines Kraftfahrzeugs ist stark von der jeweils gefahrenen Geschwindigkeit abhängig. Da die manuelle Anpassung der Lautstärke eines Autoradios an diesen Geräuschpegel als lästig empfunden wird, sind bereits Verfahren zur fahrgeräuschabhängigen Lautstärkesteuerung des Autoradios bekanntgeworden.The noise level inside a motor vehicle is strong depending on the speed traveled. Since the manual adjustment of the volume of a car radio to this Noise levels perceived as annoying are already Method for volume control of the Car radios became known.
Aus der DE-A-33 38 413 ist eine Schaltungsanordnung zur selbsttätigen störgeräuschabhängigen Lautstärkesteuerung in einem Kraftfahrzeug bekannt, wobei ein die Störungen im Fahrzeuginnenraum repräsentierendes Signal mit Hilfe eines im Fahrzeuginnenraum angebrachten Mikrophons erzeugt wird. Zur Kompensation des durch das Lautsprechersignal im Mikrophonausgangssignal erzeugten Audiosignalanteils wird von dem Mikrophonausgangssignal in einer Summierschaltung das Lautsprechereingangssignal subtrahiert, so daß am Ausgang des Subtrahierers eine Steuergröße in Form des im Fahrzeuginnenraum vorliegenden Störgeräuschpegels ansteht.From DE-A-33 38 413 a circuit arrangement for automatic noise-dependent volume control in a motor vehicle known, one of the malfunctions in Signal representing the vehicle interior with the aid of a microphones installed in the vehicle interior is generated. To compensate for the speaker signal in the Microphone output signal generated audio signal portion from the microphone output signal in a summing circuit subtract the speaker input signal so that am Output of the subtractor a control variable in the form of the im Noise level present in the vehicle interior.
Aus der EP-A-O 246 772 ist eine Anordnung zur Dämpfung von Karosserieschwingungen bei Kraftfahrzeugen bekannt, wobei die Schwingungen z. B. durch das Überfahren von Fahrbahnunebenheiten verursacht werden. Die Karosserieschwingungen werden dazu mittels eines Beschleunigungssensors erfaßt und das Meßsignal in einer Recheneinheit ausgewertet. Die Fahrwerksdämpfer des Fahrzeuges werden in Abhängigkeit des Meßsignals so abgestimmt, daß Karosserieschwingungen reduziert werden.EP-A-O 246 772 describes an arrangement for damping Body vibrations in motor vehicles known, wherein the vibrations z. B. by driving over bumps caused. The body vibrations are detected by means of an acceleration sensor and the measurement signal is evaluated in a computing unit. The Suspension of the vehicle are dependent on the Measuring signal adjusted so that body vibrations be reduced.
Aufgabe der vorliegenden Erfindung ist es, für eine fahrgeräuschabhängige Steuerung der Lautstärke eines Autoradios die Ableitung eines fahrgeräuschabhängigen Signals dahingehend zu verbessern, daß sich Maßnahmen zum Entfernen von Nutzsignalanteilen aus den Steuersignalen erübrigen.The object of the present invention is for a Control of the volume of a vehicle based on driving noise Car radios the derivation of a driving noise dependent Signals to improve that measures to Removal of useful signal components from the control signals spare.
Diese Aufgabe wird erfindungsgemäß durch die Einrichtung nach Anspruch 1 gelöst. Dabei kann vereinfachend vorgesehen sein, daß der Beschleunigungssenor im wesentlichen vertikale Beschleunigungen mißt.This object is achieved by the device according to claim 1. Doing so can be simplistic be provided that the acceleration sensor in measures significant vertical accelerations.
Die Erfindung beruht auf der Erkenntnis, daß Fahrgeräusche hauptsächlich als Körperschall in den Innenraum (Fahrgastkabine) des Kraftfahrzeugs übertragen werden. Dieses sind insbesondere die Motorgeräusche und das Abrollgeräusch der Reifen. Maßnahmen zur Entfernung des Nutzsignalanteils aus dem mit Hilfe des Beschleunigungssenors gewonnenen Signal sind bei der erfindungsgemäßen Einrichtung nicht erforderlich.The invention is based on the knowledge that driving noises mainly as structure-borne noise in the interior (Passenger cabin) of the motor vehicle are transmitted. This is especially the engine noise and that Tire rolling noise. Measures to remove the Useful signal portion from the with the help of the acceleration sensor obtained signal are in the invention Setup not required.
Insbesondere wenn gemäß einer Weiterbildung der Beschleunigungssensor im Autoradio angeordnet ist, weist die erfindungsgemäße Einrichtung den weiteren Vorteil auf, daß im Kraftfahrzeug selbst keine weiteren Installationen erforderlich sind - wie beispielsweise die Verlegung von Leitungen und die Montage eines Mikrofons. In particular if according to a further development of the Acceleration sensor is arranged in the car radio, the The inventive device has the further advantage that no further installations in the motor vehicle itself are required - such as laying Lines and mounting a microphone.
Vorzugsweise ist bei der erfindungsgemäßen Einrichtung vorgesehen, daß der Beschleunigungssensor starr mit dem Gehäuse des Autoradios verbunden ist. Eine vorteilhafte Ausgestaltung der erfindungsgemäßen Einrichtung besteht darin, daß der Beschleunigungssensor eine Signalbandbreite von etwa 1 kHz aufweist. Dadurch wird der gesamte eine Maskierung erforderliche Spektralbereich des Körperschalls abgedeckt und es können auf dem Markt erhältliche Beschleunigungssensoren verwendet werden, wie beispielsweise der Beschleunigungssensor Typ ADXL50 der Firma Analog Devices.Preferably in the device according to the invention provided that the acceleration sensor rigid with the Car radio housing is connected. An advantageous one Design of the device according to the invention exists in that the acceleration sensor has a signal bandwidth of about 1 kHz. This makes the whole one Masking required spectral range of structure-borne noise covered and it can be available on the market Acceleration sensors are used, such as the acceleration sensor type ADXL50 from Analog Devices.
Obwohl die erfindungsgemäße Einrichtung grundsätzlich auch für eine frequenzunabhängige Lautstärkeregelung geeignet ist, werden bessere Ergebnisse mit einer frequenzabhängigen Maskierung erzielt, für die gemäß einer Weiterbildung der erfindungsgemäßen Einrichtung vorgesehen ist, daß ein Ausgang des Beschleunigungssensors über eine Signalverarbeitungsschaltung mit einem vorgegebenen Algorithmus und die vom Autoradio erzeugten Audiosignale einem Mehrkanal-Equalizer zuführbar sind, dessen Ausgänge mit Steuereingängen der Signalverarbeitungsschaltung und mit Eingängen von Endstufen verbunden sind.Although the device according to the invention also in principle suitable for frequency-independent volume control is, better results with a frequency dependent Masking achieved for which according to a training of device according to the invention is provided that a Output of the acceleration sensor via a Signal processing circuit with a predetermined Algorithm and the audio signals generated by the car radio a multi-channel equalizer can be fed, the outputs with control inputs of the signal processing circuit and with Inputs from power amplifiers are connected.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung anhand mehrerer Figuren dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt:
- Fig. 1
- ein Kraftfahrzeug mit einer erfindungsgemäßen Einrichtung,
- Fig. 2
- ein Autoradio mit einem an der unteren Gehäusewand angeordneten Beschleunigungssensor und
- Fig. 3
- ein Blockschaltbild einer erfindungsgemäßen Einrichtung.
- Fig. 1
- a motor vehicle with a device according to the invention,
- Fig. 2
- a car radio with an acceleration sensor arranged on the lower housing wall and
- Fig. 3
- a block diagram of a device according to the invention.
Gleiche Teile sind in den Figuren mit gleichen Bezugszeichen versehen.Identical parts are given the same reference symbols in the figures Mistake.
Fig. 1 stellt schematisch ein Auto dar mit einer Karosserie
1, Vorderrädern 2, Hinterrädern 3, einem Motor 4 und einem
Autoradio 5, dessen Lautsprecher 6, 7 lediglich angedeutet
sind. Durch Doppelpfeile sind jeweils die auf die Räder
einwirkenden Kräfte und die vom Motor ausgehenden auf die
Karosserie wirkenden Kräfte veranschaulicht. Man erkennt,
daß somit senkrecht wirkende Kräfte einen maßgeblichen
Anteil am Körperschall haben. Ein Beschleunigungssensor 8
ist daher so angeordnet, daß er die senkrechte
Beschleunigung erfaßt.Fig. 1 shows schematically a car with a body
1,
Gemäß Fig. 2 ist der Beschleunigungssensor 8 an der
Bodenplatte des Autoradios 5 angeordnet. Er kann daher in
einfacher Weise mit der Schaltung des Autoradios verbunden
werden.2, the
Fig. 3 zeigt ein Blockschaltbild einer erfindungsgemäßen
Einrichtung, bei welcher die nicht speziell für die
Erfindung angepaßten Teile des Autoradios, wie
beispielsweise Empfangsteil, gegebenenfalls
Kassettenspieler, Stereodecoder und NF-Verstärker in einer
Schaltung 11 als NF-Quelle zusammengefaßt sind. Von der
NF-Quelle 11 werden die Audiosignale L und R einem
Mehrkanal-Equalizer 12 zugeführt, der über vier Ausgänge mit
vier Endstufen 13, 14, 15, 16 für vier Lautsprecher 17, 18,
19, 20 verbunden ist. Dabei bedeuten LF und RF die Signale
für den linken und den rechten vorderen Lautsprecher,
während die Signale LR und RR die Signale für den linken
hinteren und rechten hinteren Lautsprecher kennzeichnen. Die
Endstufen 14 und 15 invertieren jeweils das Ausgangssignal,
was durch ein Minuszeichen gekennzeichnet ist.Fig. 3 shows a block diagram of an inventive
Facility where the not specifically for the
Invention adapted parts of the car radio, such as
for example receiving part, if necessary
Cassette player, stereo decoder and audio amplifier in one
Das Ausgangssignal des Beschleunigungssensor 8 wird einer
Signalverarbeitungsschaltung 21 zugeleitet, die von den
Ausgangssignalen des Mehrkanal-Equalizers 12 steuerbar ist.
Die Signalverarbeitungsschaltung 21 verarbeitet das
Ausgangssignal des Beschleunigungssensor und die
Ausgangssignale des Mehrkanal-Equalizers mit bekannten
Algorithmen. Das Ausgangssignal der
Signalverarbeitungsschaltung 21 wird dann dem Mehrkanal-Equalizer
12 zugeleitet, um in mehreren unterschiedlichen
Frequenzbändern die Verstärkung der Audiosignale L und R zu
steuern.The output signal of the
Claims (6)
- Device for controlling the volume of a car radio as a function of the vehicle noise level, having a sensor for acquiring a signal which is a function of the vehicle noise level, the output of the sensor being connected to a signal-processing circuit (21) of the car radio for controlling the volume, characterized in that the sensor is an acceleration sensor (8) mechanically connected to the bodywork (1) of the vehicle.
- Device according to Claim 1, characterized in that the acceleration sensor (8) essentially measures vertical accelerations.
- Device according to Claim 1 or 2, characterized in that the acceleration sensor (8) is arranged in the car radio (5).
- Device according to Claim 3, characterized in that the acceleration sensor (8) is rigidly connected to the casing of the car radio (5).
- Device according to one of the preceding claims, characterized in that the acceleration sensor (8) has a signal bandwidth of about 1 kHz.
- Device according to one of the preceding claims, characterized in that the output signal of the acceleration sensor (8) is fed to the signal-processing circuit (21), which is a signal-processing circuit having a predetermined algorithm, in that the device has a multichannel equalizer (12) to which the output signals of the signal-processing circuit (21) and the audio signals produced by the LF source (11) of the car radio are fed, and in that the outputs of the multichannel equalizer (12) are connected to control inputs of the signal-processing circuit (21) and to inputs of output stages (13 to 16) of the car radio.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4430931A DE4430931A1 (en) | 1994-08-31 | 1994-08-31 | Device for controlling the volume of a car radio based on driving noise |
| DE4430931 | 1994-08-31 | ||
| PCT/DE1995/001071 WO1996007293A1 (en) | 1994-08-31 | 1995-08-16 | Device for controlling the volume of a car radio dependently upon the ambient noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0779014A1 EP0779014A1 (en) | 1997-06-18 |
| EP0779014B1 true EP0779014B1 (en) | 1998-11-11 |
Family
ID=6527027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95928425A Expired - Lifetime EP0779014B1 (en) | 1994-08-31 | 1995-08-16 | Device for controlling the volume of a car radio dependently upon the ambient noise |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6031918A (en) |
| EP (1) | EP0779014B1 (en) |
| JP (1) | JPH10504946A (en) |
| DE (2) | DE4430931A1 (en) |
| WO (1) | WO1996007293A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6295364B1 (en) * | 1998-03-30 | 2001-09-25 | Digisonix, Llc | Simplified communication system |
| DE19931270A1 (en) * | 1999-07-07 | 2001-01-18 | Harman Audio Electronic Sys | Automobile sound system and automobile with one |
| US20030040910A1 (en) * | 1999-12-09 | 2003-02-27 | Bruwer Frederick J. | Speech distribution system |
| US6549629B2 (en) | 2001-02-21 | 2003-04-15 | Digisonix Llc | DVE system with normalized selection |
| US20040258254A1 (en) * | 2003-06-17 | 2004-12-23 | Mollon Eric L. | Automotive audio system adapted to roadway conditions |
| US20070015485A1 (en) * | 2005-07-14 | 2007-01-18 | Scosche Industries, Inc. | Wireless Media Source for Communication with Devices on Data Bus of Vehicle |
| DE102007021882A1 (en) * | 2007-05-10 | 2008-11-13 | Ford Global Technologies, LLC, Dearborn | Method for optimization of noise sensation in passenger cabin of motor vehicle, which has audio system, involves adjusting sound intensity of audio system corresponding to actuation noise coming from audio system in operation |
| DE102009059680A1 (en) * | 2009-12-19 | 2011-06-22 | Bayerische Motoren Werke Aktiengesellschaft, 80809 | Method for outputting music information in a vehicle |
| KR20230103641A (en) * | 2021-12-31 | 2023-07-07 | 현대자동차주식회사 | Eco-friendly vehicle and method of supporting sound input/output for the same |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703025C3 (en) * | 1977-01-26 | 1981-04-02 | Reiner Dr.-Ing. 5270 Gummersbach Foerst | Driving simulator |
| CH644974A5 (en) * | 1979-02-09 | 1984-08-31 | Blaupunkt Werke Gmbh | CIRCUIT ARRANGEMENT FOR AUTOMATICALLY ADJUSTING THE VOLUME AT LEAST ONE SPEAKER TO A NOISE LEVEL FOR RADIO RECEIVERS IN THE SPEAKER LOCATION. |
| US4958519A (en) * | 1982-01-25 | 1990-09-25 | The Board Of Regents Of The University Of Nebraska | Velocimeter |
| JPS59230313A (en) * | 1983-06-14 | 1984-12-24 | Honda Motor Co Ltd | Audio system for car |
| DE3338413A1 (en) * | 1983-10-22 | 1985-05-02 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Circuit arrangement for the automatic adaptation of the volume of a loudspeaker to a disturbing noise level prevailing at the loudspeaker location |
| JPS60229122A (en) * | 1984-04-26 | 1985-11-14 | Genshiryoku Kogaku Shiken Center | Vibration stage controller |
| GB8610842D0 (en) * | 1986-05-02 | 1986-06-11 | Bl Tech Ltd | Suspension system |
| DE3730763A1 (en) * | 1987-09-12 | 1989-03-30 | Blaupunkt Werke Gmbh | CIRCUIT FOR INTERFERENCE COMPENSATION |
| US4930862A (en) * | 1988-01-20 | 1990-06-05 | The Babcock & Wilcox Company | Fiberoptic microbend accelerometer |
| US5069071A (en) * | 1990-08-27 | 1991-12-03 | United Technologies Corporation | Vibration monitoring in the frequency domain with a capacitive accelerometer |
| GB2256101A (en) * | 1991-05-23 | 1992-11-25 | Robert David Jackson | Power supply alarm with indication of failure duration |
| JPH05301542A (en) * | 1992-04-28 | 1993-11-16 | Pioneer Electron Corp | On-vehicle physical feeling sound device |
| US5309518A (en) * | 1992-10-15 | 1994-05-03 | Bose Corporation | Multiple driver electroacoustical transducing |
| US5483692A (en) * | 1993-11-22 | 1996-01-09 | Chrysler Corporation | Automatic variable radio volume control system |
| FR2742861B1 (en) * | 1995-12-22 | 1998-03-13 | Naphtachimie Sa | VIBRATION MEASUREMENT METHOD AND DEVICE |
| US5811821A (en) * | 1996-08-09 | 1998-09-22 | Park Scientific Instruments | Single axis vibration reducing system |
-
1994
- 1994-08-31 DE DE4430931A patent/DE4430931A1/en not_active Withdrawn
-
1995
- 1995-08-16 WO PCT/DE1995/001071 patent/WO1996007293A1/en active IP Right Grant
- 1995-08-16 EP EP95928425A patent/EP0779014B1/en not_active Expired - Lifetime
- 1995-08-16 DE DE59504237T patent/DE59504237D1/en not_active Expired - Lifetime
- 1995-08-16 JP JP8508400A patent/JPH10504946A/en active Pending
- 1995-08-16 US US08/793,667 patent/US6031918A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1996007293A1 (en) | 1996-03-07 |
| JPH10504946A (en) | 1998-05-12 |
| US6031918A (en) | 2000-02-29 |
| EP0779014A1 (en) | 1997-06-18 |
| DE4430931A1 (en) | 1996-03-07 |
| DE59504237D1 (en) | 1998-12-17 |
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