Sound path(s) to the ear protected by double hearing protection.

Sound path(s) to the ear protected by double hearing protection. Research Abstract Details 

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Sound path(s) to the ear protected by double hearing protection. Abstract Text:

Studies have shown that the attenuation performance of double hearing protection is limited by bone or tissue conduction. We present the first results of a program to determine the different paths of the sound to the ear when a person is protected by double hearing protection. In order to determine the contribution of the noise signal passing by secondary sound paths (bone or tissue conduction) into the volume of the ear canal behind the earplug, identical tests have been performed on humans and artificial heads. Time delay and attenuation through the hearing protection (NR) were measured on the ipsi- and contra-lateral side of the head. The measurements show differences in time delay and attenuation between artificial heads and humans which indicate that the main transmission mechanism is different. They also give a strong indication that the path of the acoustic signal depends on the angle of arrival when using double HP. This may partly explain the poor sound localization performance when using double HP that was reported by Brungart (2002). The single HP, and the double HP were then used in a sound localization experiment. The localization performance of these conditions will be presented along with the related parameters.

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Sound path(s) to the ear protected by double hearing protection. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of the Acoustical Society of America

VOLUME: 123

Page Numbers: 3529

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 5

MONTH: May

YEAR: 2008

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LANGUAGE: eng

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Grant and Affiliation Information for Sound path(s) to the ear protected by double hearing protection.

AFFILIATION: French German Institut of Saint Louis (ISL), 5 rue du Général Cassagnou, 68301 Saint-Louis, France, karl.buck@isl.eu.

Country: United States

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MEDLINETA: J Acoust Soc Am

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