Directivity optimization method of loudspeaker array

An optimization method and loudspeaker technology, applied in the direction of frequency/direction characteristic devices, etc., can solve problems such as failure, complex design, and low radiation efficiency

Inactive Publication Date: 2009-11-25
AAC TECH PTE LTD +1
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Problems solved by technology

[0003] However, the design of optimization measures is complicated, the radiation efficiency is low, or it fails in some frequency bands.

Method used

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  • Directivity optimization method of loudspeaker array
  • Directivity optimization method of loudspeaker array
  • Directivity optimization method of loudspeaker array

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Embodiment Construction

[0025] The directivity optimization method of the array loudspeaker of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the directivity optimization method of the array loudspeaker of the present invention, wherein the array loudspeaker is made up of n loudspeaker units evenly distributed on a straight line, the distance between two adjacent loudspeaker units is l, and the total length of the array loudspeaker is L =(n-1)×l. The distance between the test point p of the present invention and the center point of the array speaker is r, and the horizontal angle between it and the center point of the array speaker is θ. In addition, let the distance between each loudspeaker unit and the test point p be r 1 、r 2 ,, r n ; The synthetic total sound pressure of the loudspeaker unit at a point in space is P.

[0027] Using the law of cosines, then

[0028] r1=((L / 2-L / (n-1)*0))^2+r^2-2*(L / 2-L...

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Abstract

The invention provides a directivity optimization method of loudspeaker array, the method includes following steps, a loudspeaker array with n loudspeaker units uniformly disposed on a straight line is provided, such that space between two adjacent loudspeaker is 1, total length L of the loudspeaker array is (n-1)*1; a test point p is provided, such that distance between the test point p and central point of the loudspeaker array is r, the level angle of the the test point p and central point of the loudspeaker array is theta, supposes distances between each loudspeaker unit and the test point p are respectively r1, r2, ...rn; determining sound pressure and reference sound pressure of the soundspeaker at one point in space; finally determining vertical directivity function of the soundspeaker array; setting directivity optimization condition of loudspeaker array, thereby optimized power coefficient is obtained. The directivity optimization method of loudspeaker array according to the invention can implement directivity widening of the loudspeaker array with simple design.

Description

【Technical field】 [0001] The invention relates to an optimization method of an array loudspeaker, in particular to a directivity optimization method of an array loudspeaker. 【Background technique】 [0002] Array loudspeaker has a wide range of applications, and it is also a research hotspot in the field of electroacoustics. At present, the directivity optimization measures of array loudspeakers mainly include arranging array loudspeakers at logarithmic space intervals, and using quadratic residual sequences to give different delayed signals to each loudspeaker unit. Realize the directivity enhancement of the array loudspeaker. [0003] However, the design of optimization measures is complicated, the radiation efficiency is low, or there are disadvantages such as failure in some frequency bands. [0004] Therefore, it is really necessary to propose a new directivity optimization method for array loudspeakers. 【Content of invention】 [0005] The technical problem solved b...

Claims

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Application Information

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IPC IPC(8): H04R1/32
Inventor 严绪东
Owner AAC TECH PTE LTD
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