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Laser-sound: optoacoustic transduction from digital audio streams

Kaleris, Konstantinos; Stelzner, Björn; Hatziantoniou, Panagiotis; Trimis, Dimosthenis; Mourjopoulos, John

Abstract:
This work presents a novel laser-based optoacoustic transducer capable of reproducing controlled and continuous sound of arbitrary complexity in the air or on solid targets. Light-to-sound transduction is achieved via laser-induced breakdown, leading to the formation of plasma acoustic sources in any desired spatial location. The acoustic signal is encoded into pulse streams via a discrete-time audio modulation and is reproduced by fast consecutive excitation of the target medium with appropriately modulated laser pulses. This results in the signal being directly reconstructed at the desired location of the target medium without the need for a receiver or demodulation device. In this work, the principles and evaluation results of such a novel laser-sound prototype system are presented. The performance of the prototype is evaluated by systematic experimental measurements of audio test signals, from which the basic acoustical response is derived. Moreover, a generic computational model is presented that allows for the simulation of laser-sound reproduction of 1-bit or multibit audio streams. The model evaluations are validated by comparison with the acoustic measurements, whereby a good agreement is found. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000129826
Veröffentlicht am 05.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000129826
Erschienen in Scientific reports
Verlag Nature Research
Band 11
Heft 1
Seiten Art.-Nr.: 476
Nachgewiesen in Dimensions
Scopus
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