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An active sound-isolating earmuff with speech enhancement

A technology of voice enhancement and earmuffs, which is applied in the direction of earmuffs, ear therapy, earpiece/headphone accessories, etc., can solve the problems that the wearer's voice communication cannot be guaranteed, and the wearer's contact is not considered, so as to ensure normal voice communication and improve Speech intelligibility, effect of effective hearing protection

Active Publication Date: 2021-06-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • An active sound-isolating earmuff with speech enhancement
  • An active sound-isolating earmuff with speech enhancement
  • An active sound-isolating earmuff with speech enhancement

Examples

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Embodiment

[0023] Embodiment: An active sound-proof earmuff with voice enhancement function, which is used to protect hearing in a strong noise environment while ensuring normal voice communication between personnel. When the active sound-proof earmuff is isolated from strong noise, the microphone array is used to extract voice signals. And the extracted speech signal is coupled to the active noise reduction system, and finally retained in the earmuff cavity without being suppressed by cancellation. It mainly includes:

[0024] High passive sound insulation performance earmuffs, the main body is composed of a sound insulation cavity and sound-absorbing sponge, and the leather earmuffs are wrapped and fit on the auricle, which is used to passively isolate high-frequency noise outside the earmuffs.

[0025] Microphone pick-up microphone circuit, including two sets of signal conditioning circuits, which are located inside and outside the earmuffs, used for acoustic signal transduction proce...

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Abstract

The invention discloses an active sound-insulating earmuff with a voice enhancement function, which includes an earmuff with high passive sound-insulating performance; a microphone circuit for picking up sound and a microphone for collecting external environmental noise and voice signals, and collecting error noise in the cavity of the earmuff; microprocessing The device control circuit extracts the voice signal and synthesizes the anti-noise signal; the audio drive and power amplifier circuit performs reconstruction filtering and power amplification on the voice signal and the anti-noise signal; the anechoic speaker is used to emit anti-noise and output the voice signal at the same time. Based on the isolation of most of the high-frequency noise by the passive sound-proof earmuffs, the present invention suppresses the low-frequency noise near the human ear through the active noise reduction technology, and at the same time extracts the voice by arranging a microphone array outside the earmuffs combined with an array voice enhancement algorithm The signal is coupled to the active noise reduction system and input into the earmuff cavity to achieve more effective hearing protection and at the same time improve the voice intelligibility between wearers and ensure normal voice communication.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/10A61F11/14
CPCH04R1/1083A61F11/14A61F11/145
Inventor 刘剑李春峰王枝鑫
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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