Method and device for loudspeaker array setting by using quadratic residue sequence phase delay

Abstract

This invention relates to one method by use of second remaining sequence for microphone setting, which adopts phase time lag to realize microphone direction optimization and applies remaining sequence into microphone array. Each microphone unit feeds back different phase time lags signals to get one secondary remaining sequence.

Description

technical field [0001] The invention designs the setting method of the loudspeaker array, that is, improves the directivity of the loudspeaker array through the method of signal processing, so that it has better directivity at low frequency and high frequency, so as to improve the uniformity of the radiation sound field. Background technique [0002] In the 21st century with continuous technological innovation, in order to meet people's new demands for high-quality audio-visual entertainment, more and more large halls and venues have sprung up like mushrooms after rain. Since it is difficult for a single speaker to achieve the required and ideal sound pressure level, in these large venues and some outdoor places (such as stadiums, open squares), large-scale sound reproduction systems (speaker arrays composed of multiple speakers) are used. became an inevitable choice. [0003] Compared with the traditional sound reproduction system, the large l...

AI Technical Summary

Problems solved by technology

The directivity pattern (Fig. 4 is the directivity pattern of the delay time method) has relatively uniform coverage at 7000Hz, while at 8000Hz there is a wide valley point at an angle of 15 degrees, so listeners in this wide range cannot hear For the sound of this frequency, the radiation sound field is not uniform

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