Active sound insulation earmuff with voice enhancement function

Abstract

The invention discloses an active sound insulation earmuff with a voice enhancement function. The active sound insulation earmuff comprises an earmuff body with high passive sound insulation performance. The microphone pickup microphone circuit is used for collecting external environment noise and voice signals and collecting error noise in the earmuff cavity; the microprocessor control circuit isused for extracting a voice signal and synthesizing an anti-noise signal; the audio driving and power amplifying circuit is used for carrying out reconstruction filtering and power amplification on the voice signal and the anti-noise signal; and the silencing loudspeaker is used for sending out anti-noise and outputting a voice signal. According to the invention, most of high-frequency noise is isolated by the passive sound insulation earmuff; low-frequency noise is suppressed near ears through an active noise reduction technology; meanwhile, a microphone array is arranged outside the earmuffs, an array voice enhancement algorithm is combined to extract voice signals, the voice signals are coupled into an active noise reduction system and input into earmuff cavities, more effective hearing protection is achieved, meanwhile, the voice intelligibility between wearers is improved, and normal voice communication is guaranteed.

Description

technical field [0001] The invention relates to the technical field of hearing protection and speech enhancement, in particular to an active sound-insulating earmuff with a speech enhancement function. Background technique [0002] In high-noise industrial sites, low-frequency noise pollution is particularly prominent, and site personnel generally wear physical sound-proof earmuffs for hearing protection. Existing professional sound-proof earmuffs have excellent physical sound-proof performance only in the isolation of high-frequency noise, and the isolation effect on low-frequency noise is extremely limited. [0003] In order to improve the sound insulation performance of earmuffs in the full frequency band, it is necessary to combine active noise reduction technology. However, the current earmuffs with active noise reduction function will attenuate and shield the ambient sound and normal human voice together, without considering the connection between the wearer and the s...

AI Technical Summary

Problems solved by technology

However, the current earmuffs with active noise reduction function will weaken and shield the ambient sound and normal human voice together, without considering the connection between the wearer and the sound outside the earmuffs, and cannot guarantee the voice communication between the wearers in a strong noise environment

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