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Speaker group with flexibly adjustable radiation angle and setting method

A loudspeaker group and radiation angle technology, which is applied in the direction of frequency/direction characteristic devices, etc., can solve the problem of flexible control of directivity width and can not be realized, and achieve the effect of meeting different requirements of directivity

Inactive Publication Date: 2012-05-02
NANJING LANGSHENG ACOUSTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] All the above methods do not involve flexible control of the directivity width, and cannot achieve the purpose of using a group of speakers to meet the different needs of users in directivity

Method used

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  • Speaker group with flexibly adjustable radiation angle and setting method
  • Speaker group with flexibly adjustable radiation angle and setting method
  • Speaker group with flexibly adjustable radiation angle and setting method

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Comparison scheme
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Embodiment Construction

[0031] The specific implementation method of the present invention will be described below in the form of examples.

[0032] according to figure 1 and figure 2, when applying the present invention, the signal needs to be distributed to each sound source of the array after specific processing, and this distribution processing is completed in the digital signal processor. Using independent power amplifier circuits, each power amplifier is the same as the loudspeaker, arranged in a straight line.

[0033] image 3 It shows that using a specific proportional coefficient to control the output amplitude and phase of the digital filter, compared with no processing, can achieve the characteristics of wide directivity radiation. It can be seen from the simulation directivity diagram in the figure that wide directivity radiation can be obtained at four different frequency points (Figure 4).

[0034] Figure 4 It is a directivity diagram of narrow directivity radiation. It can be s...

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Abstract

The invention discloses a setting method of a speaker group with a flexibly adjustable radiation angle. Considering the wide-directivity need, a digital signal processor is provided with a group of preset filters to control the relative amplitude and phase of each sound source channel signal output; considering the narrow-directivity need, the digital signal processor is provided with another group of preset filters to control the delay time and relative amplitude of each sound source channel signal output; and to switch between the wide-directivity need and narrow-directivity need, the real-time switch is flexibly realized through an instruction in the digital signal processor. Particularly, when ten sound sources are horizontally placed, different front-end digital filter groups are set according to different needs; when 'stereo wide directivity' is required, five right-channel sound sources are fed into the digital signal processor, processed by the filters 1-5 and fed to 5 independent power amplifiers and sound sources, thus forming right-channel wide-directivity radiation; and five left-channel sound sources form left-channel wide-directivity radiation. Through the invention, narrow-directivity replay also can be realized.

Description

technical field [0001] The invention relates to a setting method of a loudspeaker group, that is, the directivity of the loudspeaker group is improved through a signal processing method, so that it can not only realize wide directivity stereo playback, but also have wide directivity at low frequency and high frequency, and improve radiation The uniformity of the sound field; and it can realize narrow directivity playback, control the radiation direction, and ensure its constant directivity within a certain bandwidth. Background technique [0002] Large-scale loudspeaker arrays have been widely used in hall sound reinforcement, live performances, sports events, etc., and have become a hot research topic in the audio field. [0003] Compared with the traditional sound reproduction system, the large loudspeaker array sound reproduction system has the following advantages: It can generate enough sound pressure level to meet the needs of large venues and open-air performances; th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/20
Inventor 沈勇沈小祥
Owner NANJING LANGSHENG ACOUSTIC TECH
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