Use of CNT Thin-film Assemblies as Microphones through Hot-film Anemometry

摘要

In recent research, carbon nanotube (CNT) thermophones have been constructed as thin-film assemblies. This work uses CNT film as a microphone through hot-film anemometry sensing the particle velocity in acoustic waves of pure frequency tones. The advantages of a CNT hot-film microphone are similar to those of CNT thermophones and include the ability to construct microphones of various sizes and shapes, since the film is ultra-lightweight and flexible. The microphone's sensitivity, power requirements, and frequency response were investigated. Results indicate that it may be feasible to use a CNT hot-film anemometer configuration as a microphone for detecting pure frequency tones across a large frequency range.