Helmet-type active anti-noise system

Abstract

The invention discloses a helmet-type active anti-noise system, which comprises a helmet covered by an intelligent material and a portable control box, wherein the helmet covered by the intelligent material is connected with the portable control box through a wire; the intelligent material covering the outer surface of the helmet comprises a sensor unit and an actuator unit; the portable control box internally and mainly comprises a signal processing unit, a driving unit, a algorithm implementation control unit and an energy supply unit; the intelligent material covering the outer surface of the helmet and the portable control box form a closed-loop automatic control system. Based on the detected real-time noise conditions around the helmet, the noise intensity around the helmet in a certain space is automatically eliminated or greatly reduced through a feed-type active noise control algorithm; and meanwhile, a small space around the mouth of a human body is considered, and when a helmet wearer speaks, a voice signal in the small space is not influenced.

Description

technical field [0001] The invention relates to an anti-noise device, in particular to a helmet type active anti-noise device. Background technique [0002] A sound wave is any pressure vibration propagating in an elastic medium, which can be a gas, liquid or solid. Noise, broadly speaking, any sound that makes people uncomfortable or that people don't want to hear can be called noise; such as the roar of machines, the sound of motors and whistles of various vehicles, the noise of people and various sudden noise etc. Strong noise not only causes people's uncomfortable feeling, but also can directly damage people's auditory system, and even produce direct pressure on the heart, circulatory system and other parts of the body. When a worker is exposed to loud noise for a long time, it will cause permanent deafness. When a new project produces noise, depending on the intensity of the noise, it is not only harmful in a certain range, but also affects nearby residents and cause...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency of the existing sound receiver noise protection equipment, and provide an active anti-noise system for the helmet, which can effectively reduce the noise intensity around the helmet through the feedback-type active anti-noise technology, and not only effectively protect the helmet wearer auditory system and provides the possibility of high-quality communication for the helmet wearer

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