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High-strength Helmholtz sound source design method based on pattern recognition

A technology of pattern recognition and design method, applied in the direction of frequency/direction characteristic devices, sensors, electrical components, etc.

Pending Publication Date: 2021-11-09
NANJING INST OF TECH +1
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  • Abstract
  • Description
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Problems solved by technology

[0002] The high-intensity sound source with low power consumption and high sound pressure amplitude output has potential application value in a variety of applications, such as sonic dust removal and soot blowing of DC pulverized coal boiler body and flue, sonic dust removal and soot blowing of solar panels installed in the open air, air Particle control and removal, acoustic suspended particle platform, particle agglomeration of acoustic dust collector, directional aggregation control of particles in air channels and flues, fire smoke elimination, atmospheric acoustic rainfall and defogging, etc., but low power consumption, high sound pressure amplitude output Designing high-intensity sound sources presents challenges

Method used

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  • High-strength Helmholtz sound source design method based on pattern recognition
  • High-strength Helmholtz sound source design method based on pattern recognition
  • High-strength Helmholtz sound source design method based on pattern recognition

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Embodiment Construction

[0044] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] Attached below Figure 1~5 The present invention is described further.

[0046] A design method of high-intensity Helmholtz sound source based on pattern recognition, including a Helmholtz sound source composed of a direct-radiating dynamic speaker and a Helmholtz resonator for radiating sound waves at Helmholtz resonance frequency, with sufficiently high sound pressure amplitude and sufficiently low input electric power The design process is to meet the basic parameters of the common loudspeaker that can produce the required sound wave frequency as the initial design parameter, and to design the structural dimensions of the Helmholtz resonator based on the criterion that the required sound wave frequency is equal to the resonance frequency of the Helmholtz resonator;

[0047] Using the numerical simulation method, calculate and describ...

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Abstract

The invention discloses a high-strength Helmholtz sound source design method based on pattern recognition. The method comprises the steps: designing a Helmholtz sound source, acquiring a change curve of sound pressure amplitudes inside and outside a sound source along with audio signal frequency by using a numerical simulation method, taking the change curve as a pattern recognition object, evaluating the peak sound pressure amplitude of the resonance frequency of the curve, and performing parameter trial calculation to obtain the optimal values of electrical, magnetic, mechanical, structural and acoustic parameters of the Helmholtz sound source. The resonance sound pressure amplitude and resonance frequency bandwidth range of the Helmholtz sound source similar to that of an experiment can be obtained by identifying sound pressure amplitude frequency simulation curve modes of balance, compression and stretching positions. By means of the method, a low-power-consumption and high-sound-pressure-amplitude Helmholtz sound source with very high parameter precision can be designed.

Description

technical field [0001] The invention relates to a pattern recognition-based high-intensity Helmholtz sound source design method, which belongs to the field of electroacoustic conversion. Background technique [0002] The high-intensity sound source with low power consumption and high sound pressure amplitude output has potential application value in a variety of applications, such as sonic dust removal and soot blowing of DC pulverized coal boiler body and flue, sonic dust removal and soot blowing of solar panels installed in the open air, air Particle control and removal, acoustic suspended particle platform, particle agglomeration of acoustic dust collector, directional aggregation control of particles in air channels and flues, fire smoke elimination, atmospheric acoustic rainfall and defogging, etc., but low power consumption, high sound pressure amplitude output The design of high-intensity sound sources presents challenges. Contents of the invention [0003] In orde...

Claims

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Application Information

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IPC IPC(8): H04R1/28
CPCH04R1/2842
Inventor 乔正辉谭慧俊
Owner NANJING INST OF TECH
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