Omni-directional sound source using facing ultrasonic transducer arrays

Okamoto K, Okubo K. Omni-directional sound source using facing ultrasonic transducer arrays. In: AES Convention 148. Audio Engineering Society; 2020. Paper 597. Available from: https://aes.org/publications/elibrary-page/?id=20835

@inproceedings{Okamoto2020_20835,
  author = {Okamoto, Kyoka and Okubo, Kan},
  title = {{Omni-directional sound source using facing ultrasonic transducer arrays}},
  booktitle = {AES Convention 148},
  note = {Paper 597},
  year = {2020},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20835}
}

TY  - CPAPER
TI  - Omni-directional sound source using facing ultrasonic transducer arrays
AU  - Okamoto, Kyoka
AU  - Okubo, Kan
T2  - AES Convention 148
M1  - Paper 597
SP  - 1
PY  - 2020
DA  - 2020/05/06
UR  - https://aes.org/publications/elibrary-page/?id=20835
PB  - Audio Engineering Society
LA  - en
AB  - We present a new omni-directional sound source using facing ultrasonic transducer arrays. Ultrasonic transducers have been studied for sensors in acoustic sensing, arrayed parametric loudspeakers, or non-contact manipulation. In this research, ultrasonic transducer arrays are placed face-to-face on a straight line, and the arrays radiate sound with different ultrasonic frequency each other from both sides. Then the audible sound with differential frequency of the ultrasound signals is omni-directionally emitted. In this report, we fabricated sound source employing a facing ultrasonic transducer array, and evaluated the frequency characteristics and directivity of the sound source experimentally. This result suggests that it is possible to produce simpler, smaller, and light-weighted omni-directional loudspeakers with higher design like a ring and polyhedron.
ER  -