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A processing method for loudspeaker playback array control signals of a sound field quantitative reproduction control system

A technology of array control and control system, applied in the direction of electrical components, etc., can solve the problems of unspecific reproduction research and application limitations of actual speakers.

Active Publication Date: 2014-10-22
TSINGHUA UNIV
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Problems solved by technology

However, since the current theoretical reproduction model based on ambisonics does not consider factors such as the characteristics of the actual loudspeaker and the actual non-free field situation, the research on the reproduction of the actual loudspeaker is not specific, and its application is also greatly limited

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  • A processing method for loudspeaker playback array control signals of a sound field quantitative reproduction control system
  • A processing method for loudspeaker playback array control signals of a sound field quantitative reproduction control system
  • A processing method for loudspeaker playback array control signals of a sound field quantitative reproduction control system

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Embodiment Construction

[0034] A control system and method for the quantitative reproduction of the sound field proposed by the present invention are described in detail in conjunction with the accompanying drawings and embodiments as follows:

[0035] In order to achieve the stated purpose of the present invention, the overall structure of a control system for the quantitative reproduction of the sound field provided by the present invention, such as figure 1 As shown, it includes: a loudspeaker playback array 11, a sampling array 12, a multi-channel digital-to-analog converter 13, a computer 14 storing a signal processing program and a multi-channel data acquisition card 15. Wherein, sampling array 12 is positioned at the central area (being evaluation area) of speaker playback array 11, is made up of a plurality of microphones, and each microphone is a sampling measuring point, and the black dot in the figure represents microphone; The output end of each microphone is all connected with The input ...

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Abstract

The invention relates to a sound-field quantitative regeneration control system and a method thereof and belongs to the technical field of sound-field regeneration and control. The sound-field quantitative regeneration control system comprises a loudspeaker replay array, a sampling array, a multi-channel digital-analog converter, a computer and a multi-channel data acquisition card, wherein signal processing programs are stored in the computer. The method includes sampling a target sound field; subjecting sampling signals to frequency spectrum analysis; subjecting target sound pressure signals to frequency spectrum analysis by means of Fourier signal processing, obtaining a frequency structure of the target sound pressure signals, extracting amplitude and phase of each frequency component in the frequency spectrum structure, and converting the target sound pressure signals into frequency domain quantity: measuring an electric sound transfer function of the loudspeaker replay array to the sampling array, solving control signals of the loudspeaker replay array on the basis of the transfer function identification method, and inputting the control signals to the loudspeaker replay array to replay. By the method, replay error of the sound field and the target sound field is small.

Description

technical field [0001] The invention belongs to the technical field of sound field reproduction and control, in particular to a control system capable of quantitatively reproducing a target sound field within a limited area and a method thereof. Background technique [0002] It is of great theoretical and practical significance to accurately reproduce the original sound field in the spatial region. [0003] The theory of sound field reproduction based on ambisonics has been extensively studied. This theory expands the sound field in series based on spherical harmonic functions, so that an accurate mathematical description of a sound field can be carried out. Especially in recent years, High Order Ambisonics (High Order Ambisonics) theory has been applied in the actual free field sound field reproduction. [0004] These theoretical methods can achieve high accuracy in the free field situation. However, because the current theoretical model of reproduction based on ambisonic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R29/00
Inventor 郑四发李申广彭博连小珉
Owner TSINGHUA UNIV
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