Intelligent noise elimination system with directional noise reduction function

Abstract

The invention discloses an intelligent noise elimination system with a directional noise reduction function and belongs to the noise reduction field. The intelligent noise elimination system includes an audio sensor, a noise elimination subsystem, an adaptive filter, a sound generation system and an intelligent cloud platform, wherein the audio sensor, the noise elimination subsystem, the adaptive filter and the sound generation system are embedded in equipment, and the intelligent cloud platform is arranged on a cloud end and wirelessly communicates with the noise elimination subsystem; the intelligent cloud platform collects and stores the audios of various sound sources online or offline, fill an audio library with the audios, carries out library construction and training so as to generate identification parameters corresponding to various kinds of noises, and determines the offset factor of a noise source; the noise elimination subsystem collects a sound source at a specified direction through the audio sensor, preprocesses sound waves, and then compares the sound waves with noise samples on the intelligent cloud platform, carries out identification and classification, obtains the offset factor of the noise source, and transfers corresponding data to the adaptive filter; the adaptive filter generates a reverse waveform signal sequence of noise sound waves; the sound generation system generates reverse sound wave interference waveforms of the noises; and the noise sound waves and the reverse sound wave interference waveforms offset each other, so that noise reduction is achieved.

Description

technical field [0001] The invention relates to the technical field of noise reduction, in particular to an intelligent noise elimination system capable of directional noise reduction. Background technique [0002] Noise disturbances are often encountered in daily life. Traffic noise, equipment noise, social noise, and construction noise are relatively common sources of noise. Noise has great damage to the hearing, eyesight, and cardiovascular system of the recipient, so noise reduction products have a large market space. [0003] The commonly used noise control methods are: [0004] Reduce noise in the sound transmission path, control the transmission of noise, and change the noise transmission path that the sound source has already emitted. Such as sound absorption, sound insulation, sound barrier, vibration isolation and other measures, as well as reasonable planning of urban and architectural layouts. [0005] To reduce the noise of the sound source, the industry and ...

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Problems solved by technology

[0007] The objective shortcoming of the prior art mainly lies in: 1, although the mode of carrying out noise protection to the sound receiver or the sound receiving organ is effective, there is also the following shortcoming, that is, the comfort of the human body is relatively poor: the way of wearing a soundproof tool, although It has a certain effect on noise reduction, but for the sound receiver, wearing these sound insulation tools for a long time makes the human body less comfortable; 2. It is impossible to achieve directional noise reduction. Wearing sound insulation tools achieves noise reduction through sound insulation. The characteristic of this method is that all sounds are shielded indiscriminately, which will lead to new problems. For example, some sounds that should not be shielded, such as some warning sounds and dialogue sounds, will also be shielded at the same time; 3 1. The convenience of use is not enough. Usually these sound insulation tools are not carried with you. When the receiver needs noise reduction, he often finds that he does not have the sound insulation tool. Therefore, the convenience of using this method is not enough.

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