National Taiwan University

Industrial Technology Research Institute

Ing-Yih Leu

Chih-Kung Lee

Wen-Ching Ko

Ming-Daw Chen

Chang-Ho Liou

Wen-Jong Wu

Wen-Hsin Hsiao

Yi-Jen Chan

Jia-Lun Chen

Chih-Chiang Cheng

Chien-Kai Tseng

Jen-Hsuan Ho

Che-I Kao

Ji-De Huang

An electret diaphragm and a speaker using the same are provided. The electret diaphragm includes an electret layer, a bonding layer adhered to a surface of the electret layer, and an aluminum (Al) electrode layer adhered on the bonding layer. The electret layer at least includes ethylene group polymer. A material of the bonding layer is ethylene-ethyl-acrylate (EEA) or ethylene-vinyl acetate (EVA).

Electret diaphragm and speaker using the same

A speaker system that includes an audio signal-receiving interface, a modulating circuit, a phase-control circuit, and a number of speaker units. The audio signal-receiving interface is configured to receive an audio signal, and the modulating circuit is coupled with the audio signal-receiving interface. The modulating circuit is configured to modulate a low frequency component of the audio signal and to generate a modulated signal. The phase-control circuit is coupled with the modulating circuit and the audio signal-receiving interface. The phase-control circuit is configured to receive the modulated signal and a high-frequency component of the audio signal and to control a phase of the modulated signal, a phase of the high-frequency component of the audio signal, or both. The speaker units are coupled with the phase-control circuit and configured to generate sound waves based on signals supplied by the phase-control circuit.

Electrostatic loudspeaker array

Growing community of inventors

Taipei, Taiwan

Ing-Yih Leu