Piezoelectric Actuators for Flat-Panel Loudspeakers

Heilemann MC, DiPassio T. Piezoelectric Actuators for Flat-Panel Loudspeakers. In: AES Convention 153. Audio Engineering Society; 2022. Paper 10618. Available from: https://aes.org/publications/elibrary-page/?id=21947

@inproceedings{Heilemann2022_21947,
  author = {Heilemann, Michael C. and DiPassio, Tre},
  title = {{Piezoelectric Actuators for Flat-Panel Loudspeakers}},
  booktitle = {AES Convention 153},
  note = {Paper 10618},
  year = {2022},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=21947}
}

TY  - CPAPER
TI  - Piezoelectric Actuators for Flat-Panel Loudspeakers
AU  - Heilemann, Michael C.
AU  - DiPassio, Tre
T2  - AES Convention 153
M1  - Paper 10618
PY  - 2022
DA  - 2022/10/06
UR  - https://aes.org/publications/elibrary-page/?id=21947
PB  - Audio Engineering Society
LA  - en
AB  - Piezoelectric actuators offer advantages in terms of weight and form-factor when compared with traditional inertial exciters used to drive flat-panel loudspeakers. Unlike inertial exciters, piezoelectric actuators induce vibrations in the panel by generating bending moments at the actuator edges. Models for piezoelectric excitation are developed, and it is shown that piezoelectric actuators are most effective at driving resonant modes whose bending half-wavelength is the same size as the actuator dimensions, giving a natural boost to the high-frequency response. Flat-panel loudspeaker design techniques such as the modal crossover method, and the corresponding array layout optimization are adapted using the model for the response of piezo-driven panels. The adapted design techniques are shown to eliminate the isolated, low-frequency bending modes responsible for reduced sound quality on a prototype panel speaker.
ER  -