MIRE-IL methodology applied to measuring the noise attenuation of earmuff hearing protectors

Autor:	Danilo de Almeida-Agurto, Samir N. Y. Gerges, Jorge P. Arenas
Rok vydání:	2011
Předmět:	Engineering Acoustics and Ultrasonics business.industry Acoustics Attenuation Electrical engineering Noise attenuation Objective method Standard deviation law.invention Communication noise Bone conduction law Noise control business Earmuffs
Zdroj:	Applied Acoustics. 72:451-457
ISSN:	0003-682X
Popis:	This article describes an objective methodology for measuring the noise attenuation of earmuff hearing protectors using as a reference the method known as microphone-in-real-ear (MIRE). The methodology implements the insertion loss (IL) paradigm, in which IL is measured using miniature microphones, specially designed to comply with ANSI and ISO standards for the MIRE technique. The results for four different hearing protectors are compared with the subjective method known as real-ear-attenuation-at-threshold (REAT). Correction factors are included in the methodology to account for external effects such as physiological noise and bone conduction. The objective method predicted well the real protection of the earmuffs and the proposed methodology showed lower standard deviation values than the REAT method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e5a3d4460be3e506d79ff6a322a00a40 https://doi.org/10.1016/j.apacoust.2011.01.009 Zobrazit plný text záznamu Full Text from ScienceDirect