Virtual sound screen

Abstract

The virtual sound shelter includes error microphone array, secondary loudspeaker array and controller. The error microphone array is distributed around the area to be controlled and is used for enveloping the area to be controlled, the secondary loudspeaker array is distributed in the periphery of error microphone array, the controller can be used for receiving signal of error microphone array and controlling the output of secondary loudspeaker array so as to reduce the noise of the area enveloped by error microphone array.

Description

1. Technical field [0001] The invention relates to a sound barrier, in particular to a virtual sound barrier which uses active noise control technology to realize the quietness of a local area in a noisy environment. 2. Background technology [0002] In order to eliminate noise and obtain a quiet area in a noisy environment, a sound barrier made of traditional sound insulation materials is usually used for sound insulation. However, traditional sound barriers have unavoidable disadvantages: firstly, traditional sound barriers are not effective at low frequencies; secondly, traditional sound barriers are heavy and bulky, which limits their use in certain occasions The cabin of the space shuttle and the control room of the nuclear submarine have high noise levels, which directly affect the judgment, work efficiency and health of the staff, but it is difficult to reduce the noise with traditional sound barriers. [0003] There is another way to reduce the harm of noise to the ...

AI Technical Summary

Problems solved by technology

However, traditional sound barriers have unavoidable disadvantages: firstly, traditional sound barriers are not effective at low frequencies; secondly, traditional sound barriers are heavy and bulky, which limits their use in certain occasions There is a high level of noise in the cabin of the space shuttle and in the control room of the nuclear submarine, which directly affects the judgment, work efficiency and health of the staff, but it is difficult to reduce the noise with traditional sound barriers

[0003] There is another way to reduce the harm of noise to the human body: let the staff in the noisy environment wear earmuffs or earplugs to isolate the noise, but it is also not effective for low-frequency noise

Also, earmuffs and earplugs can make staff uncomfortable

Images