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An active omnidirectional loudspeaker system with equalization

A non-directional, loudspeaker technology, applied in signal processing, frequency response correction, electrical components, etc., can solve the problems of attenuation in the low frequency range, uneven frequency response, etc., and achieve the effect of small amplitude change and flat amplitude frequency response

Active Publication Date: 2022-05-13
FUJIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] The purpose of the present invention is to design a loudspeaker system to solve the problems of uneven frequency response and serious attenuation of low frequency range in the above-mentioned technology

Method used

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  • An active omnidirectional loudspeaker system with equalization

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, a kind of active non-directional loudspeaker system with equalization, comprises audio signal interface 1, and audio signal interface 1 is connected with digital filter 2, and described digital filter 2 comprises adopting spatial multi-point transfer function to carry out geometric average An inverse equalizer 201 set by an inverse transfer function and a band-pass filter 202 with upper and lower frequencies of 8879.7 Hz and 44.5 Hz respectively, the digital filter 2 is connected to a power amplifier 3, and the power amplifier 3 is connected to a loudspeaker 4, and the loudspeaker 4 It includes a reverse horn speaker 401 and a low frequency speaker 402 .

[0029] Compared with the non-directional sound source of the 12-sided loudspeaker system, the volume of the loudspeaker ...

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Abstract

The invention discloses an active non-directional loudspeaker system with equalization, which includes an audio signal interface connected with a digital filter, the digital filter includes an inverse equalizer and a band-pass filter, and the digital filter is connected to There is a power amplifier, which is connected to the speakers, which include a counterhorn and a subwoofer. The invention is small in size and only works within the test frequency range required by relevant standards; by testing the spatial multi-point transfer function of the loudspeaker, and designing a digital signal filter system according to the multi-point transfer function, the amplitude frequency of the digital signal filter system The response is reciprocal to the amplitude frequency response of the omnidirectional speaker system on the peak and valley, so that the amplitude frequency response of the speaker system is relatively flat and the amplitude change of adjacent frequency bands is small; it can be used in architectural acoustics and electrical sound test.

Description

technical field [0001] The invention relates to the field of special sound sources for acoustic measurement, in particular to an active non-directional loudspeaker system with equalization. Background technique [0002] In architectural acoustics and noise testing, the non-directional sound source speaker system is used as the test sound source, and its ability to radiate sound to all directions in the space is required to be consistent (non-directional), and it must be relatively flat in the frequency range of interest in the test. frequency response. And with the deepening of low-frequency noise research, more and more experimenters and researchers hope that the omnidirectional sound source speaker system has better low-frequency reproduction capability (as low as 44.5Hz) to meet the requirements of low-frequency signal-to-noise ratio . [0003] In the process of using the omnidirectional sound source speaker system, it is found that the existing omnidirectional sound so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/04
CPCH04R3/04H04R2430/00
Inventor 蔡阳生林从华何惠妍
Owner FUJIAN UNIV OF TECH
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