Extensible and beam-controllable directional sound wave transmitting device

Abstract

The invention discloses an extensible and beam-controllable directional sound wave transmitting device, which belongs to the technical field of directional sound wave transmitting. The directional sound wave transmitting device comprises an audio digitization unit, a signal processing unit, a signal amplification circuit and a parametric array, wherein the audio digitization unit is electrically connected with the signal processing unit; the audio digitization unit is used for digitizing an audio file; and the signal processing unit is used for realizing preprocessing, modulation and control processing of audio signals, outputting modulation signals output by the signal processing unit to a rear-stage parametric array after the modulation signals pass through the signal amplification unit,transmitting the modulation signals to a nonlinear medium through the parametric array, and generating directional sound waves through the nonlinear effect of the nonlinear medium. Sound is directionally projected to a specific area, sound interference of other areas is reduced, and noise pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of directional sound wave emission, in particular to a variety of expandable, beam-controllable directional sound wave emission devices. Background technique [0002] The problem of noise pollution is becoming more and more serious, and more and more people are beginning to understand and realize that this "invisible killer" is eroding our physical and mental health. Since sound waves are not directional in the air, people's social activities and the sound from traditional loudspeakers spread around, which is likely to cause noise pollution. Noise prevents people from getting quiet when they are resting, which is particularly annoying and can easily cause neighborhood disputes. Traditional loudspeakers have gradually been unable to meet various special needs of people's lives. More and more occasions also need a kind of loudspeaker equipment with high directivity of sound transmission, low noise pollution a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an expandable and beam-controllable directional sound wave emission device for reducing noise pollution in view of the existing technical problems of low difference-frequency sound pressure level and insufficient scalability of parametric arrays, so as to Suitable for application scenarios that require directional emission of sound waves

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