Digital wave synthesis, wave feedback technology, low power distortion.

数字波形合成，波形反馈技术，电源失真度低。

youdao

Another technique IRCAM is developing uses scores of small speakers lined up around the concert hall to create something called wave field synthesis, or WFS. It was designed to address a problem that's been brought to IRCAM over and over again: dead spots in concert halls.

NPR: IRCAM: The Quiet House Of Sound