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Method and apparatus for setting loudspeaker array utilizing reverse-phase

A loudspeaker array and loudspeaker technology, applied in the direction of frequency/direction characteristic devices, sensors, transducer circuits, etc., can solve the problems of low radiation efficiency, complex design, lack of ideal solutions, etc., and achieve uniform radiation sound field and improved directivity , the effect of simple design method

Inactive Publication Date: 2007-03-21
NANJING UNIV
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Problems solved by technology

[0015] The above methods all improve the uniformity of the speaker array radiation sound field by adjusting the source intensity, but there are shortcomings such as complex design and low radiation efficiency, and there is no ideal solution

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  • Method and apparatus for setting loudspeaker array utilizing reverse-phase
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  • Method and apparatus for setting loudspeaker array utilizing reverse-phase

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Embodiment Construction

[0041] If the normal phase is expressed as "+" and the reversed phase is expressed as "-", then the traditional 7-point linear array with the same phase can be expressed as "++++++++", and the present invention will be based on the number of speaker units designed Different, choose different normal phase and anti-phase arrangement, in order to realize the optimization of array pointing characteristics.

[0042] Take when the number of array units N=7 as an example, according to the present invention, the arrangement of the optimized array can be expressed as "-+--+++" according to the above rules, that is, the input of the three speaker units on the left side 1, 3, and 4 The signal is out of phase by 180 degrees, while the input signal to the remaining speaker units remains in normal phase. Since there is a spectral transformation relationship between the directional response and the intensity distribution of the sound source, the far-field directional response of the array is...

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Abstract

A method of utilizing phase reverse to set loudspeaker array includes feeding positive phase signal or feeding phased reverse signal by each loudspeaker unit, feeding input signal of phase reverse by at least one loudspeaker unit and applying means as regulating phases of partial loudspeaker units to realize directivity optimization of loudspeaker array.

Description

technical field [0001] The present invention designs a setting method of the loudspeaker array, that is, improves the directivity of the loudspeaker array by adjusting the phase of part of the loudspeaker units, so that it has better directivity in the working frequency range, so as to improve the uniformity of the radiation sound field. Background technique [0002] In order to provide high-quality sound reinforcement performance in large halls and venues, a higher sound pressure level is required. Since it is difficult for a single speaker to achieve the ideal sound pressure level, a speaker array composed of multiple speakers is an effective solution, and the speaker array has also become a research hotspot in the audio field. [0003] Compared with the traditional sound reproduction system, the large loudspeaker array sound reproduction system has the following advantages: [0004] 1. It can generate enough sound pressure level to meet the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/32H04R3/00
Inventor 沈勇安康欧达毅
Owner NANJING UNIV
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