An alternative method to measure the on-axis difference-frequency sound in a parametric loudspeaker without using an acoustic filter

• Main Authors: Gan, Woon-Seng, Ji, Peifeng., Liu, Wei., Wu, Shuaibing., Yang, Jun.
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/84908; http://hdl.handle.net/10220/12609
• Institution: Nanyang Technological University

The self-demodulation characteristic of finite-amplitude ultrasonic sound waves can be applied with parametric loudspeaker to reproduce audible sound with highly directivity. But measuring the difference-frequency sound is still a problem due to the spurious sound generated as a result of nonlineari...