DE19944206A1 - Automobile audio system has microprocessor circuit responding to detected engine revs for providing simulated engine noise - Google Patents

Abstract

The audio system has a car radio (3) and/or a cassette or CD player, coupled to a number of loudspeakers (4a,4b,4c,4d) and incorporating a microprocessor circuit (1), which detects the automobile engine revs (2), for providing a corresponding tone frequency signal, supplied to the loudspeakers together with the audio signals, or on its own.

Description

The invention relates to a motor-dependent audio system in a motor vehicle.

Motor vehicles mostly have engines (petrol engine, diesel motor, electric motor) that drive this to continue be used. This movement can be displayed as a rotation number at various points in the engine (depending on Art of the motor) can be tapped. So z. B. at the Zündein direction, the alternator or the OT transmitter.

Furthermore, motor vehicles, usually already standard from the factory, have audio components. They often consist of a car radio with cassettes and / or CD drive, as well as CD changers, internal and external amplifiers, loudspeakers ( 2 , 4 or more) and other components.

Nowadays, automotive engines are and noise levels getting lower. Exhaust systems to increase of the noise level are relatively expensive to purchase and usually only retrofittable. Furthermore, these are legal tied regulations like dB values, or they have to without dept. In addition, they cannot be switched on or off and also pollute the environment. There are variations in sound only marginally possible.

The object of this invention is to give the occupants of motor vehicles (particularly the vehicle driver) the opportunity to select sound images which produce different engine or interior engine noises. These sound pictures are speed-dependent and can be switched on and off. Individual sound images should be available individually, which the drive unit itself cannot generate or amplify. The superimposition of the new sound image over that of the drive unit is intended to acoustically simulate another drive unit in the vehicle interior. Furthermore, the front and rear engines should be emitted into the vehicle interior. By tapping the speed ( 2 ) z. B. by the ripple of the voltage at the alternator, TDC transmitter, ignition coil, injection pulse or the like, this signal is forwarded to the car radio as an example and possibly combined with speed and load information ( 6 ). By means of a circuit with microprocessors ( 1 ), preferably in the car radio, depending on the preselection of the sound pattern, you set all frequencies that the selected drive unit would have at the same speed (speed and load case). Via the audio system ( 3 ), the sound signal is mixed with the radio signal and broadcast together via the loudspeakers ( 4 a, 4 b, 4 c, 4 d). Several sound patterns should be pre-programmed. An interface ( 5 ) for reprogramming other sound patterns should possibly be possible.

Advantages of this invention are that:

• - Noise level and type of noise are without great financial Selectable expenditure
• - Exhaust system extra equipment due to interior sound unnecessary
• - environmental protection
• - Increased, changed noise level at any time
• - can be switched off and selected
• - better feeling for the prevailing speed of the drive day regates (speed too low or too high) z. B. good for driving Beginner
• - Structurally very quiet engine noises can be amplified become
• - Engines that are otherwise only installed in expensive motor vehicles can be heard in less expensive motor vehicles with little effort
  Sound pictures would be z. B .:
• - large engines
• - racing engines
• - Turbocharger engines / pipes
• - turbines
• - other diverse music sounds

Claims (8)

1. Engine-dependent audio device in a motor vehicle with an audio system ( 3 ) z. B. car radio, as well as several speakers ( 4 a, 4 b, 4 c, 4 d) and the ability to influence the audio frequency response. Equipped as standard with all necessary connections ( 7 ) for operation such as mains, antennas and loudspeaker connections, characterized in that a circuit ( 1 ) with microprocessors provides a sound frequency by detecting the speed ( 2 ), the drive unit ( 8 ) Signal (sound image) analogous to the speed, which is mixed with or without Ra diofrequency signals via the speakers in the motor vehicle is broadcast. It can be switched on and off and has several freely selectable sound patterns from other drive units or other sound motifs. It is possible to put different speed ranges of existing and selected drive units in a relationship. 2. Audio device according to claim 1, characterized in that in addition to the speed and speed and load case ( 6 ) are taken into account in the sound image. 3. Audio device according to claim 1, characterized in that a subsequent programming of sound images for the available speed spectrum via an interface ( 5 ) is possible. 4. Audio device according to claim 1, even without an audio system itself with its own power amplifier, speakers, subwoofers and Mains connection 5. Audio device according to claim 1, characterized in that also noise generated by the drive unit and amplified can be. 6. Audio device according to claims 1-5, characterized in that audio signal and music channel at your volume level can be regulated differently, as in their sound volume 7. Audio device according to claim 1, characterized in that Loudspeakers at the front and rear, depending on the selected sound pattern can be controlled differently.   8. Audio device according to claim 1, characterized in that the possibility of speed and speed exists to indicate the gear just driven.