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Digital-Driven Piezoelectric Speaker using Multi-Bit Delta-Sigma Modulation

Although a substantial quantity of music data is stored as digital information, as in the case of CDs and MDs, an analog drive is still the main component of a loudspeaker. If the speaker can be driven digitally, it becomes possible to perform all processes from the input to the output digitally. As a result, the analog power amplifier and some other components become unnecessary and a small, light, and high-quality speaker can be achieved. In this paper, we propose a digital-driven piezoelectric speaker employing multi-bit delta-sigma modulation.

Authors: Ogata, Katsuya; Soga, Tsuyoshi; Ueno, Hajime; Yasuda, Akira
Affiliation: Hosei University
AES Convention:121 (October 2006) Paper Number:6943 Import into BibTeX
Subject:Loudspeakers

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