The Hong Kong University of Science and Technology

Hong Kong Baptist University

Jie Pan

Ping Sheng

Guancong Ma

Zhen Dong

Ho Yiu Mak

Xiaonan Zhang

An active sound barrier has at least one passive sound absorber at or near a boundary location. A microphone provides an output to a frequency division module, in which a plural of frequencies are filtered to provide outputs corresponding to frequency segments of the receiving transducer output at respective ones of the frequencies. An active driving circuit drives plural speakers or output transducers at respective ones of the frequencies, with at least a subset of the speakers or output transducers at or close to the barrier. The speakers or output transducers cooperate with the passive sound absorber to reduce noise across a wide frequency band as well as to effect an electrically switchable soft boundary.

Growing community of inventors

Hong Kong, China

Jie Pan