A finite element model to improve noise reduction based attenuation measurement of earmuffs in a directional sound field

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• 作者：Marc-André ; Gaudreau^a ; ^{Marc-andre.gaudreau@cegepdrummond.ca} ; Franck Sgard^b ; Fré ; dé ; ric Laville^a ; Hugues Né ; lisse^b
• 关键词：Hearing protection ; Continuous F-MIRE ; Finite element model ; Perfectly matched layer ; HPD field attenuation
• 刊名：Applied Acoustics
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：119
• 期：Complete
• 页码：66-77
• 全文大小：3951 K
• 卷排序：119

文摘

Continuous F-MIRE measurements method for earmuffs need to be improved. The measured noise reduction (NR∗) varies as a function of sound incidence. A finite element model of an earmuff is developed to investigate this variation. The model is evaluated experimentally (SPL external mic, NR∗, NR∗ variation). The model is used to choose the optimal position for F-MIRE external microphone.