Transducers with the direct D/A conversion, sometimes called digital transducers, either loudspeakers or earphones, are searching their ways into being. There have been several attempts to design such devices, but none of them left research laboratories and made its way to commercial use yet. Most of them use „classical“ electroacoustic transduction principles, i.e. electrodynamic or electrostatic. In this article the possibility to use opto-acoustic transduction principle is explored. First, the principles of physical phenomena used in this transducer are revised. Then, some construction details in light of their usage in the digital earphone are described.

Author: Husník, Libor
Affiliation: Czech Technical University in Prague, Faculty of Electrical Engineering
AES Convention: 122 (May 2007) Paper Number: 7064
Publication Date: May 1, 2007 Import into BibTeX
Session Subject: Microphones and Loudspeakers; Audio in Computers (Games, Internet, Desktop Computer Audio)
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=14049

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