Active noise-prevention earplug and sound signal processing method thereof

Abstract

The invention relates to an active noise-prevention earplug and a sound signal processing method thereof. The active noise-prevention earplug is characterized by comprising an earplug head with a built-in sound channel and a control cavity connected with the earplug head, wherein the front end of the sound channel of the earplug head is provided with a minitype loudspeaker, the control cavity is provided with a circuit switch, a minitype microphone and a charging interface, the control cavity is internally provided with an audio processor and a microcell, the audio processor is respectively and electrically connected with the minitype loudspeaker, a circuit switch, the minitype microphone and the microcell, and the microcell is electrically connected with the charging interface. The audio processor is used for decomposing, analyzing, classifying and separating sound signals collected by the minitype microphone and filter the sound signals to remove interfering noise harmful to audition, and then, useful sound signals which are synthesized renewably are output through the minitype loudspeaker and transmitted into an inner ear of a human body through the sound channel. The active noise-prevention earplug and the sound signal processing method thereof disclosed by the invention can meet the operation requirements of employees, under various noisy environments, on noise prevention and useful signal perception.

Description

technical field [0001] The invention relates to an earplug and a sound signal processing method thereof, in particular to an active noise protection earplug for hearing protection and a sound signal processing method thereof. Background technique [0002] The ear is an important sensory organ of the human body, and its hearing is one of the main ways for humans to obtain information. A working environment filled with a lot of noise will not only affect the work efficiency of the employees, but also cause hearing damage to the employees. Generally, when the steady-state noise is higher than 85 decibels and the impulse noise is higher than 140 decibels, it will cause noise damage to human hearing and can lead to irreversible deafness. [0003] For noise that may endanger human health, passive methods such as wearing anti-noise earplugs and noise-cancelling earmuffs with special materials and structural designs are usually used to protect hearing. However, for practitioners u...

AI Technical Summary

Problems solved by technology

Patent 200980129012.1 implements hearing enhancement and hearing protection by limiting the peak power, but because the useful signal and the noise signal are superimposed on each other, the useful signal will also be damaged in the peak clipping process, so the contradiction between noise protection and environmental perception is not completely resolved

Patent 200910266020.2 proposes a non-enclosed earphone and its receiver-end voice enhancement device and method. It adopts the method of generating anti-phase cancellation signal to actively

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