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Distance sense synthetic method in three-dimensional sound field synthesis

A technology of three-dimensional sound field and synthesis method, which can be applied to sensors, sensor parts, frequency/directional characteristic devices, etc., and can solve problems such as limiting the scope of application

Active Publication Date: 2012-11-21
INST OF ACOUSTICS CHINESE ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

[0003] Binaural sound field synthesis technology and VBAP technology aim at synthesizing the sound characteristics of the listener's two ears, and can produce a more realistic three-dimensional sense of space in the ears; however, these algorithms are limited by the listening position, and the synthesized three-dimensional sound field It can only be felt at one point in space, which greatly limits its application range

Method used

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  • Distance sense synthetic method in three-dimensional sound field synthesis
  • Distance sense synthetic method in three-dimensional sound field synthesis
  • Distance sense synthetic method in three-dimensional sound field synthesis

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0050] 1. Set the reverberation time of the room to be synthesized and the length, width and height of the room; or use the sound pressure level to measure the reverberation time of the room to be reproduced, as well as the length, width and height of the room;

[0051] 2. Loudspeaker frequency response measurement;

[0052] 3. Bring in the formula Calculation of reflection coefficient β i ;

[0053] 4. Set the position coordinates of each loudspeaker and sound source in the room, and put them into formula (12) to get the corresponding excitation function of each loudspeaker;

[0054] D ( x 0 , ω ) = a ( x 0 ) ...

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Abstract

The invention relates to a distance sense synthetic method in three-dimensional sound field synthesis. The method comprises firstly setting reverberation time of a room to be synthesized and the length, the width and the height of the room; or using acoustic pressure levels to measure reverberation time of a room to be replayed and the length, the width and the height of the room; secondly measuring frequency response of a loudspeaker, obtaining a reflection coefficient beta i according to a formula; and finally obtaining corresponding excitation functions of each loudspeaker according to setting position coordinates of each loudspeaker and each sound source. In the formula, P (chi, omega) is sound pressure synthesized in a bounded area V, and Ssw(omega) is a source signal frequency domain expression. Therefore, relation between room acoustics and traditional WFS technology is built, and the excitation function is finally used to enable a three-dimensional sound field to have direction sense and the distance sense.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional sound field synthesis, in particular, the invention relates to a distance sense synthesis method in three-dimensional sound field synthesis. Background technique [0002] In recent years, three-dimensional sound field synthesis has become a research hotspot and has gradually begun to be applied in practice, see Yiteng (Arden) Huang, Jingdong Chen, and Jacob Benesty, "Immersive audioschemes," IEEE Signal Processing Magazine, pp.20-32, Jan .2011. At present, the main three-dimensional sound field synthesis technology, such as binaural technology based on the principle of perception, please refer to W.G. Gardner, "3-D audio using loudspeakers," Ph.D.thesis, MIT, 1997, VBAP technology based on signal amplitude control, please refer to V.Pulkki "Compensating displacement of amplitude-panned virtual sources." AudioEngineering Society, 22th Int.Conf.on Virtual, Synthetic and Entertainment Audi...

Claims

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Application Information

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IPC IPC(8): H04R1/20H04R3/00
Inventor 李军锋李娟付强颜永红
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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