Theoretical study and experiment on frequency characteristics of a probe microphone

Author

Yunoki, Ken´ichi ; Tanaka, Yasuyuki ; Yoshino, Takashi ; Hirakawa, Hiromitsu

Author_Institution

Fac. of Eng., Kagoshima Univ., Japan

fYear

1999

fDate

36373

Firstpage

875

Lastpage

878

Abstract

A probe microphone has a thin, empty and long probe tube. Therefore, frequency characteristics of a probe microphone are not good. In this paper, we analyze a probe microphone constructed by a probe, a spacer and a regular microphone. In this microphone, the sound wave is attenuated by viscosity of air. So, sound solution is given with the attenuation constant δ and the phase constant K. As a result, frequency characteristics of a probe microphone were obtained for the size of the probe tube, δ and K. In the experiment, applying a white noise or a rectangular signal to the speaker,sound from the probe microphone was compared with that of the regular microphone. Experimental results agreed well with the theoretical ones

Keywords

acoustic wave transmission; microphones; probes; white noise; frequency characteristics; probe microphone; rectangular signal; sound wave attenuation; spacer; white noise; Acoustic noise; Attenuation; Ducts; Equations; Frequency; Integrated circuit noise; Microphones; Probes; Viscosity; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE Annual, 1999. 38th Annual Conference Proceedings of the

Conference_Location

Morioka

Print_ISBN

4-907764-13-8

Type

conf

DOI

10.1109/SICE.1999.788593

Filename

788593