An active noise reduction earplug using a piezoelectric laterally radiating loudspeaker

Autor:	Pascal Hamery, Pierrick Lotton, Raoul Bauer, Anne-Marie Bruneau
Rok vydání:	2003
Předmět:	Engineering Acoustics and Ultrasonics Microphone business.industry Acoustics Noise reduction Loudspeaker Acoustic radiation Electret business Actuator Thermal conduction Piezoelectricity
Zdroj:	Applied Acoustics. 64:591-609
ISSN:	0003-682X
DOI:	10.1016/s0003-682x(02)00139-1
Popis:	This paper describes the electroacoustic behaviour of a new piezoelectric Active Noise Reduction (ANR) earplug device. The sensor is a microphone having suitable characteristics chosen from among commercially available electret microphones. The actuator is a cylindrical piezoelectric ceramic loaded with a thin fluid film. An analytic model of laterally radiating loudspeaker, based on fundamental equations of acoustics, which takes into account the effect of viscosity and heat conduction is adapted to describe the acoustic radiation of the actuator. Theoretical and experimental frequency responses in a small cavity and an example of the ANR that can be obtained with the earplug are presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1bc495c9bd6fc135ac6e00c6da080942 https://doi.org/10.1016/s0003-682x(02)00139-1 Zobrazit plný text záznamu Full Text from ScienceDirect