Laser-Sound Transduction From Digital ΣΔ Streams

Kaleris K, Stelzner B, Hatziantoniou P, Trimis D, Mourjopoulos J. Laser-Sound Transduction From Digital ΣΔ Streams. J Audio Eng Soc. 2022;70(1/2):50-61. doi:10.17743/jaes.2021.0053

@article{Kaleris2022_21550,
  author = {Kaleris, Konstantinos and Stelzner, Bjoern and Hatziantoniou, Panagiotis and Trimis, Dimosthenis and Mourjopoulos, John},
  title = {{Laser-Sound Transduction From Digital ΣΔ Streams}},
  journal = {Journal of the Audio Engineering Society},
  volume = {70},
  number = {1/2},
  pages = {50--61},
  year = {2022},
  month = jan,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2021.0053},
  url = {https://doi.org/10.17743/jaes.2021.0053}
}

TY  - JOUR
TI  - Laser-Sound Transduction From Digital ΣΔ Streams
AU  - Kaleris, Konstantinos
AU  - Stelzner, Bjoern
AU  - Hatziantoniou, Panagiotis
AU  - Trimis, Dimosthenis
AU  - Mourjopoulos, John
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 70
IS  - 1/2
SP  - 50
EP  - 61
PY  - 2022
DA  - 2022/01/06
DO  - 10.17743/jaes.2021.0053
UR  - https://doi.org/10.17743/jaes.2021.0053
PB  - Audio Engineering Society
LA  - en
AB  - In this work, a novel optoacoustic transducer prototype capable of reproducing continuous sound waves from single or multi-bit ∑∆ digital audio streams is presented. The prototype is based on a pulsed nanosecond laser that generates acoustic N-waves via Laser-Induced Breakdown in air or indirect sound via the laser ablation effect on solid targets. Technical aspects of the prototype platform are presented, with emphasis on the laser control system and audio signal–processing techniques deployed for the modulation of the pulsed laser radiation. Experimental results from acoustic measurements of reproduced test audio signals are presented within the frequency range allowed by the specifications of the specific laser. The system’s audio performance characteristics are derived along with its impulse and frequency responses. The experimental results are compared with simulations of the optoacoustic transducer’s response via a computational model, showing good agreement.
ER  -