Prototype of Parametric Array Loudspeaker on Mobile Phone and its Acoustical Characteristics

Nakashima Y, Ohya T, Yoshimura T. Prototype of Parametric Array Loudspeaker on Mobile Phone and its Acoustical Characteristics. In: AES Convention 118. Audio Engineering Society; 2005. Paper 6521. Available from: https://aes.org/publications/elibrary-page/?id=13237

@inproceedings{Nakashima2005_13237,
  author = {Nakashima, Yusuke and Ohya, Tomoyuki and Yoshimura, Takeshi},
  title = {{Prototype of Parametric Array Loudspeaker on Mobile Phone and its Acoustical Characteristics}},
  booktitle = {AES Convention 118},
  note = {Paper 6521},
  year = {2005},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13237}
}

TY  - CPAPER
TI  - Prototype of Parametric Array Loudspeaker on Mobile Phone and its Acoustical Characteristics
AU  - Nakashima, Yusuke
AU  - Ohya, Tomoyuki
AU  - Yoshimura, Takeshi
T2  - AES Convention 118
M1  - Paper 6521
PY  - 2005
DA  - 2005/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13237
PB  - Audio Engineering Society
LA  - en
AB  - The listening approach that uses a parametric array loudspeaker system on a mobile phone is proposed, and the acoustic characteristics of a mobile-phone-size super-directional loudspeaker prototype are reported. The prototype has two sets of parametric loudspeakers that emit narrow ultrasonic beams that are demodulated into audible frequencies by the nonlinearity of air. Using an ultrasonic carrier wave amplitude-modulated by audible frequency, we realize audible sound pressures above 70dBSPL at the distance of 50cm, and also confirm the high directivity of the sound field. With the small-size super-directional loudspeaker, it is possible to provide a personal sound field for hands-free playback in mobile environments.
ER  -