EP0779014A1 - Dispositif servant a reguler l'intensite sonore d'un autoradio en fonction du niveau sonore du vehicule - Google Patents

Dispositif servant a reguler l'intensite sonore d'un autoradio en fonction du niveau sonore du vehicule

Info

Publication number
EP0779014A1
EP0779014A1 EP95928425A EP95928425A EP0779014A1 EP 0779014 A1 EP0779014 A1 EP 0779014A1 EP 95928425 A EP95928425 A EP 95928425A EP 95928425 A EP95928425 A EP 95928425A EP 0779014 A1 EP0779014 A1 EP 0779014A1
Authority
EP
European Patent Office
Prior art keywords
acceleration sensor
car radio
volume
noise
controlling
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.)
Granted
Application number
EP95928425A
Other languages
German (de)
English (en)
Other versions
EP0779014B1 (fr
Inventor
Djahanyar Chahabadi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blaupunkt Werke GmbH
Original Assignee
Blaupunkt Werke GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Blaupunkt Werke GmbH filed Critical Blaupunkt Werke GmbH
Publication of EP0779014A1 publication Critical patent/EP0779014A1/fr
Application granted granted Critical
Publication of EP0779014B1 publication Critical patent/EP0779014B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • 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-dependent control of the volume of a car radio.
  • the noise level inside a motor vehicle is heavily dependent on the speed at which it is driven. Since the manual adjustment of the volume of a car radio to this noise level is perceived as annoying, various methods for controlling the volume of the car radio as a function of driving noise have already become known. It is particularly advantageous to set the volume of the useful signal as a function of the spectral distribution of the driving noise separately according to frequency ranges, the so-called driving noise masking.
  • an acceleration sensor can be mechanically connected to the body of the motor vehicle to generate a noise-dependent signal. It can be provided in a simplified manner that the acceleration sensor essentially measures vertical accelerations.
  • the invention is based on the knowledge that driving noise is transmitted mainly as structure-borne noise into the interior (passenger cabin) of the motor vehicle. These are especially the engine noise and the rolling noise of the tires. Measures to remove the useful signal component from the signal obtained with the aid of the acceleration sensor are not necessary in the device according to the invention.
  • the device according to the invention has the further advantage that no further installations are required in the motor vehicle itself - such as the laying of lines and the mounting of a microphone. It is preferably provided in the device according to the invention that the acceleration sensor is rigidly connected to the housing of the car radio.
  • An advantageous embodiment of the device according to the invention is that the acceleration sensor has a signal bandwidth of approximately 1 kHz. As a result, the entire spectral range of the structure-borne noise required for masking is covered and acceleration sensors available on the market can be used, such as, for example, the acceleration sensor type ADXL50 from Analog Devices.
  • an output of the acceleration sensor is generated by a signal processing circuit with a predetermined algorithm and that generated by the car radio Audio signals can be fed to a multi-channel equalizer, the outputs of which are connected to control inputs of the signal processing circuit and to inputs of output stages.
  • Fig. 2 is a car radio with an acceleration sensor arranged on the lower housing wall and Fig. 3 is a block diagram of a device according to the invention.
  • Fig. 1 shows schematically a car with a body 1, front wheels 2, rear wheels 3, a motor 4 and a car radio 5, the speakers 6, 7 are only indicated.
  • the double forces indicate the forces acting on the wheels and the forces acting on the body from the engine. It can be seen that vertical forces therefore have a significant share in structure-borne noise.
  • An acceleration sensor 8 is therefore arranged so that it detects the vertical acceleration.
  • the acceleration sensor 8 is arranged on the base plate of the car radio 5. It can therefore be easily connected to the circuit of the car radio.
  • Fig. 3 shows a block diagram of a device according to the invention, in which the parts of the car radio not specially adapted for the invention, such as the receiving part, possibly cassette player, stereo decoder and LF amplifier, are combined in a circuit 11 as LF source.
  • the audio signals L and R are fed from the NF source 11 to a multi-channel equalizer 12, which is connected via four outputs to four output stages 13, 14, 15, 16 for four loudspeakers 17, 18, 19, 20.
  • LF and RF denote the signals for the left and right front loudspeakers, while the LR and RR signals denote the signals for the left rear and right rear loudspeakers.
  • the output stages 14 and 15 each invert the output signal, which is indicated by a minus sign.
  • the output signal of the acceleration sensor 8 is fed to a signal processing circuit 21 which can be controlled by the output signals of the multi-channel equalizer 12.
  • the signal processing circuit 21 processes the output signal of the acceleration sensor and the output signals of the multi-channel equalizer using algorithms which are essentially known.
  • the output signal of the signal processing circuit 21 is then fed to the multi-channel equalizer 12 in order to control the amplification of the audio signals L and R in several different frequency bands.

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)

Abstract

L'invention concerne un dispositif servant à réguler l'intensité sonore d'un autoradio en fonction du niveau sonore du véhicule. Afin de produire un signal dépendant du niveau sonore du véhicule concerné, un détecteur d'accélération peut être relié mécaniquement à la carrosserie de l'automobile.
EP95928425A 1994-08-31 1995-08-16 Dispositif servant a reguler l'intensite sonore d'un autoradio en fonction du niveau sonore du vehicule Expired - Lifetime EP0779014B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4430931A DE4430931A1 (de) 1994-08-31 1994-08-31 Einrichtung zur fahrgeräuschabhängigen Steuerung der Lautstärke eines Autoradios
DE4430931 1994-08-31
PCT/DE1995/001071 WO1996007293A1 (fr) 1994-08-31 1995-08-16 Dispositif servant a reguler l'intensite sonore d'un autoradio en fonction du niveau sonore du vehicule

Publications (2)

Publication Number Publication Date
EP0779014A1 true EP0779014A1 (fr) 1997-06-18
EP0779014B1 EP0779014B1 (fr) 1998-11-11

Family

ID=6527027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95928425A Expired - Lifetime EP0779014B1 (fr) 1994-08-31 1995-08-16 Dispositif servant a reguler l'intensite sonore d'un autoradio en fonction du niveau sonore du vehicule

Country Status (5)

Country Link
US (1) US6031918A (fr)
EP (1) EP0779014B1 (fr)
JP (1) JPH10504946A (fr)
DE (2) DE4430931A1 (fr)
WO (1) WO1996007293A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6295364B1 (en) * 1998-03-30 2001-09-25 Digisonix, Llc Simplified communication system
DE19931270A1 (de) * 1999-07-07 2001-01-18 Harman Audio Electronic Sys Automobiles Soundsystem und Automobil mit einem solchen
EP1247428B1 (fr) * 1999-12-09 2003-08-27 Frederick Johannes Bruwer Systeme de distribution vocale
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 (de) * 2007-05-10 2008-11-13 Ford Global Technologies, LLC, Dearborn Verfahren zur Optimierung des Geräuschempfindens in der Fahrgastzelle eines Kraftfahrzeuges, welches ein Audio-System aufweist
DE102009059680A1 (de) * 2009-12-19 2011-06-22 Bayerische Motoren Werke Aktiengesellschaft, 80809 Verfahren zur Ausgabe von Musik-Informationen in einem Fahrzeug
KR20230103641A (ko) * 2021-12-31 2023-07-07 현대자동차주식회사 친환경 차량 및 그를 위한 음향 입출력 지원 방법

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DE2703025C3 (de) * 1977-01-26 1981-04-02 Reiner Dr.-Ing. 5270 Gummersbach Foerst Fahrtsimulator
CH644974A5 (de) * 1979-02-09 1984-08-31 Blaupunkt Werke Gmbh Schaltungsanordnung zum selbsttaetigen anpassen der lautstaerke mindestens eines lautsprechers an einen am lautsprecherort herrschenden stoergeraeuschpegel fuer rundfunkempfaenger.
US4958519A (en) * 1982-01-25 1990-09-25 The Board Of Regents Of The University Of Nebraska Velocimeter
JPS59230313A (ja) * 1983-06-14 1984-12-24 Honda Motor Co Ltd 車両のオ−デイオ装置
DE3338413A1 (de) * 1983-10-22 1985-05-02 Blaupunkt-Werke Gmbh, 3200 Hildesheim Schaltungsanordnung zum selbsttaetigen anpassen der lautstaerke eines lautsprechers an einen am lautsprecherort herrschenden stoergeraeuschpegel
JPS60229122A (ja) * 1984-04-26 1985-11-14 Genshiryoku Kogaku Shiken Center 振動台制御装置
GB8610842D0 (en) * 1986-05-02 1986-06-11 Bl Tech Ltd Suspension system
DE3730763A1 (de) * 1987-09-12 1989-03-30 Blaupunkt Werke Gmbh Schaltung zur stoergeraeuschkompensation
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 (ja) * 1992-04-28 1993-11-16 Pioneer Electron Corp 車載用体感音響装置
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 (fr) * 1995-12-22 1998-03-13 Naphtachimie Sa Procede et dispositif de mesure de vibrations
US5811821A (en) * 1996-08-09 1998-09-22 Park Scientific Instruments Single axis vibration reducing system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9607293A1 *

Also Published As

Publication number Publication date
WO1996007293A1 (fr) 1996-03-07
EP0779014B1 (fr) 1998-11-11
DE4430931A1 (de) 1996-03-07
JPH10504946A (ja) 1998-05-12
DE59504237D1 (de) 1998-12-17
US6031918A (en) 2000-02-29

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