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- W3011073459 abstract "Abstract Soundproof earmuffs are common hearing protection devices (HPDs) for high-noise industrial sites. Traditional passive soundproof earmuffs based on physical sound insulation principle could receive great noise reduction in high-frequency portion while suffer performance limitation in low-frequency portion. This shortcoming could be effectively overcome by introducing active noise control (ANC) technique and designing active soundproof earmuffs system. However, additional high-frequency noises will be again introduced inside the earmuff cavity when feedforward ANC subsystem is used. In fact, the passive noise insulation structure of professional passive soundproof earmuff can be regarded as an excellent low pass filter which leads to the primary noise propagated into the earmuff cavity being targeted has no high coherence with the reference signal or introduces an additive reference measurement noise. In this paper, the effects of passive noise insulation structure of the earmuff on the ANC subsystem is analyzed, which reveals that the ANC subsystem can be optimizedly designed to improve noise reduction performance of active soundproof earmuffs system by compensating the passive noise insulation structure with a low pass filter. Simulations and experiments are carried out to verify the performance improvement of the designed active soundproof earmuffs system." @default.
- W3011073459 created "2020-03-23" @default.
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- W3011073459 date "2020-08-01" @default.
- W3011073459 modified "2023-09-24" @default.
- W3011073459 title "Active soundproof earmuffs system with passive noise insulation structure compensation" @default.
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- W3011073459 doi "https://doi.org/10.1016/j.apacoust.2020.107321" @default.
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