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A method and device for constructing a diffuse sound field environment in a car based on virtual speakers

A diffused sound field and loudspeaker technology, applied to stereo systems, electrical components, etc., can solve the problems of ASD sound authenticity reduction

Active Publication Date: 2022-02-08
WUHAN UNIV OF TECH +1
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Problems solved by technology

[0004] The embodiment of the present application provides a method and device for constructing a diffused sound field environment in a car based on virtual speakers, which solves the problem that passengers in the car perceive the direction of the ASD sound and causes the authenticity of the ASD sound to decrease.

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  • A method and device for constructing a diffuse sound field environment in a car based on virtual speakers
  • A method and device for constructing a diffuse sound field environment in a car based on virtual speakers
  • A method and device for constructing a diffuse sound field environment in a car based on virtual speakers

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Embodiment Construction

[0076] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0077] This embodiment provides a method for constructing a diffuse sound field environment in a car based on virtual speakers, such as figure 1 , figure 2 , image 3 As shown, it mainly includes the following steps:

[0078] Step 1. Perform analog-to-digital conversion processing on the original audio information through the audio processing chip.

[0079] Convert the original audio e 0 Input to the DSP chip, and perform analog-to-digital conversion inside the DSP chip.

[0080] Specifically, the original audio e 0 Send it to the audio processing chip for the chip to read. The input audio can be single-channel audio or multi-channel audio.

[0081] A specific audio input method is: build an audio input model in the DSP processing softwar...

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Abstract

The invention belongs to the technical field of digital signal processing, and discloses a method and device for constructing a diffuse sound field environment in a car based on a virtual speaker. The method includes performing decorrelation processing on input original audio information to obtain multiple audio frequencies, and constructing a target diffuse sound field environment. The HRTF parameter information is measured and equalized, and the HRTF filter is built. After the audio passes through the HRTF filter, sounds from different directions are virtualized, and the obtained audio from several directions is superimposed and sent to the real speaker. The device includes an audio decorrelation processing unit, an equalization processing unit, an HRTF filter unit, and an audio gain superposition unit. The invention solves the problem that passengers in the car perceive the direction of the ASD sound, which causes the authenticity of the ASD sound to be reduced, and can realize the sound field in the car to generate a sense of envelopment in the acoustic space, meeting the setting requirements for the sound quality in the car.

Description

technical field [0001] The present invention relates to the technical field of digital signal processing, in particular to a method and a device for constructing a diffuse sound field environment in a vehicle based on a virtual loudspeaker. Background technique [0002] With the development of the automotive NVH (Noise, Vibration, Harshness, noise, vibration, and harshness) industry, people have new requirements for the automotive sound environment. The popularity of electric vehicles has brought about major OEMs and consumers The pursuit of sound quality. ASD (Active Sound Design, active sound design) is a way to satisfy consumers' driving experience by simulating engine sound, solve the problem of excessive quietness of the internal sound environment of electric vehicles, and improve the comfort of the car. [0003] In order to design a more realistic engine sound effect, in addition to the requirement to approach the fidelity of the sound, it is also necessary to design ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S7/00H04S3/00
CPCH04S7/303H04S3/006
Inventor 刘志恩魏浩钦刘惟伊谢丽萍胡杰罗玉兰刘浩孙唯张光
Owner WUHAN UNIV OF TECH
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