JPH04504916A - acoustic enhancement system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] In-car sound synthesizer Technical field The present invention relates to the treatment of noise in vehicles, particularly road vehicles.

Background technology The driver and passengers inside the passenger compartment of a conventional passenger car are exposed to a lot of noise caused by the vehicle engine. Exposed to large amounts of externally generated noise. There are various methods for reducing ambient noise. Suggestions have been made. The present invention provides a physical This invention relates to enhancement processing of perceived vehicle noise.

Disclosure of invention This invention is a noise enhancement system that works inside a vehicle. ). This system uses signals that represent sounds depending on the movement of the vehicle. depending on the source and/or selective operation and/or vehicle operation or travel, to provide the vehicle occupant with the desired loudspeaker or other electroacoustic transducer - or more, to give the signal an acoustic experience a vibration generator, a vibration generator, etc.

The signal source of the signal representing the desired sound may be a pre-stored information source and/or - or more. It may be an electroacoustic transducer. These may be used in response to noise or It operates according to the operation of the engine. The electroacoustic transducer may therefore be, for example: - or including further microphones or vibration detectors, preferably signal processing means. It can be connected to In that case, the output of the converter is directly converted to the desired value. It can be a wave-shaped sound. In place of this, a microprocessor that inputs the converter output A signal representing the desired acoustics can be obtained from a processor-controlled synthesizer, and A synthesizer can be started at the output of the converter so as to output the desired signal. Ru. - or more microphones installed in the vehicle cabin and connected to the signal processing means. It can be used for feedback. It is possible to memorize a signal representing the desired acoustics. A microprocessor that controls the synthesizer can match the synthesizer with the converter output. It can be arranged as follows.

The sounds heard by a user of a device according to an embodiment of the invention may be e.g. Bi-performance represents the acoustics of a road vehicle. This device therefore controls the driving of the car. while driving, the acoustics are audible to the cabin occupants to enhance the occupant's driving experience. make it possible to

In particular, when equipped with the system according to the present invention, the vehicle's You can get rapid acceleration from a high-output engine in response to pressing the accelerator. This system For example, it can respond to a gear change or throttle operation. acoustic This is not limited to engine noise, but includes, for example, the siren sound of police vehicles. Make a warning sound sound when a predefined vehicle engine speed is exceeded be able to.

- or more loudspeakers and/or - or more vibration generators of this system is typically located within the passenger compartment of the vehicle, but instead of, or as well as, or more loudspeakers or vibration generators in the engine room or a suitable engine part. Or, it can be provided on the vehicle body part so that those vibration effects or modification effects can be obtained. sound from them can be transmitted to occupants of the vehicle passenger compartment and even outside the vehicle. People can also hear sounds along the same route as those from vehicle engines.

Although the device according to the invention can be used stand-alone, it is generally It is convenient to integrate with the in-car entertainment devices (1, C, E) used in cars. Ru. Sounds related to vehicle motion are integrated with the entertainer, preferably alternately; that is, selectively or alternately in response to vehicle motion. For example, vehicle sounds are It is heard only at speed, and once the speed is reached, the road is interrupted by entertainment sounds. this invention The system also creates in-phase amplified acoustic vibrations in the vehicle passenger compartment. Ambient noise can be reduced by canceling or reducing unwanted noise. Integrates with active noise reduction system (dynamic noise reduction system) You can also do that. Then, the noise reduction can be adjusted to the desired sound related to vehicle operation. This can be done in such a way as to prevent interference with sound or entertainment sounds, etc. The integrated system should be operated only when the system is being provided, and not used at other times. Good too.

Brief description of the drawing FIG. 1 shows an embodiment of the invention, an audio entertainment device and a noise control or processing device. Block circuit diagram in combination with FIG. 2 is a partial view of a modification of the device of FIG. 1;

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be explained in more detail with reference to embodiments shown in the drawings.

The system shown in Figure 1 can be installed in the cabin of a passenger car to provide vehicle operating noise enhancement, audio entertainment equipment, and ambient noise reduction - or is an integrated system with all the necessary components to achieve more It is a stem.

The in-car entertainment (1, C, E,) component of this system is connected to antenna 4. radio tuner 2 connected to - or more compact discs, digital - or more decks for playing back recorded tapes or cassettes and an audio signal source comprising at least one set of.

The outputs of tuner 2 and deck or deck group 5 are supplied to preamplifier 6. , Preamplifier 6 includes signal source selection, volume control, and bass/treble control. (bass/treble control), graphic equalization, etc. For this purpose, a conventional control means 7 is connected and also connected to a switching device to be described later. has been done. 1 like this. C, E, components typically have multiple N Outputs the signal of the output channel of the output channel, which allows balance and fader control. will be performed. The output of preamplifier 6 is sent to a mixer, preferably balanced mixer 9. and its output operates a loudspeaker 11 installed in the passenger compartment of the vehicle or more. The signal is supplied to the power amplifier 10 that can perform the following steps.

For enhancing the vehicle acoustics, the system has a pre-recorded sound source 15, This sound source 15 includes one of the types of decks mentioned in deck 5, or Different N class decks can be used. For selective replacement of signal storage media No skill is required. The operation of the sound source 15 is obtained by the transducer 16. Vehicle operations such as throttle movements and gear changes are typically supplied by line 17. The system according to this embodiment During acceleration or other operations of a vehicle equipped with a outputs a signal representing the other desired sound.

The system of this embodiment may be used instead of or in conjunction with the sound source 15 - or The microphone 20 has the above configuration. The microphone 20 is a microphone of a real vehicle. Outputs a signal representative of engine noise or other vehicle component operating noise.

The output signal is processed in the signal processing unit 21 and then guided to the preamplifier 6. .

This signal processing unit 21 can be configured with a molded circuit with a relatively simple configuration. Wear. Even in this case, sufficient output can be provided to the preamplifier 6. − or instead of or with more microphones 20 , the system of this embodiment may include one or more transformers, such as vibration detectors, etc. It has a ducer 22. Transducer 22 transmits a signal responsive to engine operation. is processed by the signal processing unit and then supplied to the preamplifier 6.

Instead of the shaping circuit 21, the signal processing unit is a microprocessor, as shown in FIG. The synthesizer 24 can be configured by a synthesizer 24 controlled by a sensor 25. transduyu input from the microphone 20 or transducer 22 is Transducer used as a trigger to generate the desired sound from the synthesizer Control of the sensor 16 output provides enhanced engine noise or vehicle interior noise. It will be done.

The outputs of the acoustic source 15 and the signal processing unit 21 are amplified by an amplification means ( A power amplifier) 10 and a loudspeaker 1 are used to generate sound through a line 19. The signal is then supplied to the preamplifier 6.

Additionally or alternatively, the signal from the sound source 15 or the signal processing unit may The amplifier output is delivered outside the vehicle to drive a loudspeaker 26 or more. Can be used. For example, inside or near the engine compartment of a vehicle. A loudspeaker 26 is provided to emphasize the actual volume of the vehicle engine. Also, the above preliminaries The amplifier output drives the vibration actuator 27 operated by the vehicle panel 28. It can also be used for The loudspeaker 26 or the vibration actuator 27 is Power is supplied by a further power amplifier 29.

For noise reduction, the system in this example uses adaptive noise cancellation. tion controller 30. This controller 30 was previously published in PCT Publication No. 8810. No. 2912. This controller 30 has a programmed micro Through adaptive filtering performed by the processor and memory unit Based on the reference signals obtained from - or more microphones 31 An output signal derived from the error signal is provided from the L channel. micro The phone 31 is installed in the passenger compartment so that it is not noticeable, and the reference signal is PCT Publication No. 8. If it is obtained directly from the vehicle engine as disclosed in GLO No. 2912, good.

- or more microphones 31 or similarly arranged without noise reduction; The output of one or more microphones is transmitted to the signal processing unit 21 or When fed back to the microprocessor 25 via line 32, the resulting signal Adaptive control of the processing unit is stored in memory within the microprocessor and preset. This is done to provide a defined enhancement noise signal.

The outputs of the preamplifier 6 and the noise cancellation controller 30 are connected to power amplifier means. The balance mixer 9 supplies output to the radio tuner 2 and the deck. 5 and the desired audio signal from one or the other of the noise cancellation controls. The noise cancellation signal from the controller is combined by the balanced mixer 9. It will be done. In this case, the control means 7 has no influence.

The system of this embodiment includes an on/off switch that controls power amplifiers 10 and 29 and mixer 9. /Off switches and noise enhancement equipment, entertainment equipment, and noise reduction and a selection switch to select one or more of the option equipment. .

The number of channels of the loudspeaker 11 should match the number of output channels of the preamplifier 6. Assuming that there is an M channel between the signal processing unit 21 and the amplifier 15, , this number M is the greater of the number of entertainment channels N or the number of noise reduction channels. It is better to make it more than that.

- or more deck 5 and sound [15 and signal processing unit 2 are preamplifier 6] may have built-in coupling to the The sea urchin can be directly supplied to the mixer 9.

It is clear that this invention can be practiced in several ways other than the embodiments described above. .

international search report international search report GB 9000597 S^　36218

Claims (11)

[Claims] 1. a signal source of a signal representative of a sound responsive to vehicle motion; outputs said signal to the transducer in response to wheel motion and/or driving conditions. an in-vehicle acoustic engine comprising means for generating a desired acoustic experience for the occupants of the vehicle; hancement system. 2. The signal source includes at least one pre-recorded sound source and a vehicle or vehicle. at least one microphone that responds to engine noise and The in-vehicle acoustic engine according to claim 1, further comprising a vibration sensor responsive to engine vibration. hancement system. 3. The signal source includes one or both of a microphone and a vibration sensor, and the signal source Claim 2 further comprises a signal processing unit that shapes and outputs the signal obtained from the source. Acoustic enhancement system in the vehicle described. 4. The signal source includes one or both of a microphone and a vibration sensor, and the signal source According to claim 2, the signal processing unit receiving the signal includes a combiner for its output. Acoustic enhancement system in the vehicle described. 5. The synthesizer includes a microprocessor having storage means for storing signals representing the sound. The synthesizer adapts the signal from the signal source to the stored signal. The in-vehicle sound enhancement system according to claim 4. 6. It is equipped with an error-sensing microphone whose output is connected to the signal processing unit. combined with an adaptively controlled noise cancellation system supplied to the The in-vehicle sound enhancement system according to any one of claims 3, 4, and 5. Mu. 7. Output is provided in response to a signal responsive to vehicle motion from the transducer. An in-vehicle acoustic enhancement system according to any one of claims 1 to 6. 8. one or more loudspeakers whose transducers are located in the vehicle engine area The in-vehicle acoustic enhancement system according to any one of claims 1 to 7, comprising: Tem. 9. The transducer includes one or more loudspeakers located within the passenger compartment of the vehicle. The in-vehicle acoustic enhancement system according to any one of claims 1 to 8. . 10. Loudspeakers are often used in in-car entertainment systems and noise cancellation systems. An in-vehicle acoustic enhancement system according to claim 8, which also forms a part of the system. . 11. The transducer transmits at least one vibration that causes vibrations in the vehicle panel. The in-vehicle acoustic enhancement system according to claims 1 to 10, comprising a dynamic generator. Tem.