A Novel Sharp Beam-Forming Flat Panel Loudspeaker Using Digitally Driven Speaker System

Iwaide M, Yasuda A, Kuniyoshi D, Yokota K, Moriyasu Y, Sakuta K, Nakashima F, Masayuki Y, Yoshino M. A Novel Sharp Beam-Forming Flat Panel Loudspeaker Using Digitally Driven Speaker System. In: AES Convention 131. Audio Engineering Society; 2011. Paper 8469. Available from: https://aes.org/publications/elibrary-page/?id=15995

@inproceedings{Iwaide2011_15995,
  author = {Iwaide, Mitsuhiro and Yasuda, Akira and Kuniyoshi, Daigo and Yokota, Kazuyuki and Moriyasu, Yugo and Sakuta, Kenji and Nakashima, Fumiaki and Masayuki, Yashiro and Yoshino, Michitaka},
  title = {{A Novel Sharp Beam-Forming Flat Panel Loudspeaker Using Digitally Driven Speaker System}},
  booktitle = {AES Convention 131},
  note = {Paper 8469},
  year = {2011},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15995}
}

TY  - CPAPER
TI  - A Novel Sharp Beam-Forming Flat Panel Loudspeaker Using Digitally Driven Speaker System
AU  - Iwaide, Mitsuhiro
AU  - Yasuda, Akira
AU  - Kuniyoshi, Daigo
AU  - Yokota, Kazuyuki
AU  - Moriyasu, Yugo
AU  - Sakuta, Kenji
AU  - Nakashima, Fumiaki
AU  - Masayuki, Yashiro
AU  - Yoshino, Michitaka
T2  - AES Convention 131
M1  - Paper 8469
PY  - 2011
DA  - 2011/10/06
UR  - https://aes.org/publications/elibrary-page/?id=15995
PB  - Audio Engineering Society
LA  - en
AB  - In this paper, we propose a beam-forming speaker based on digitally direct driven speaker system (digital-SP); the proposed speaker employs multi-bit delta-sigma modulation in addition to a line speaker array with flat-panel-loudspeakers (FPLS) and a delay circuit. The proposed speaker can be realized only by D flip-flops and digital-SP. The sound direction can easily be controlled digitally. All processes can be performed digitally without the use of analog components such as power amplifiers, and a small, light, thin, high-quality beam-forming speaker system can be realized. The prototype is constructed using an FPGA, CMOS drivers, and a line FPLS array. The 20dB attenuation for 20 degree direction is measured.
ER  -