Title :
Electret condenser microphones for measurement instruments
Author :
Ohyagi, A. ; Adachi, D. ; Kodama, H. ; Yasuno, Y.
Author_Institution :
Rion Co., Ltd., Tokyo
Abstract :
In this paper, 1/2 inch and 1/4 inch ECM for measurement were discussed. The changes of sensitivity to frequency in UC-59 is within plusmn 0.2 dB from 10 Hz till l 7 kHz while it is within plusmn 0.3 dB from 100 Hz till 30 kHz in UC-54. The linearity of measured value and applied sound pressure was realized below 148 dB in UC-59.
Keywords :
acoustic variables measurement; capacitive sensors; dielectric devices; electrets; microphones; microsensors; ECM; UC-59 frequency sensitivity; applied sound pressure; electret condenser microphones; measurement instruments; size 0.25 inch; size 0.5 inch; Electrets; Electric variables measurement; Electrochemical machining; Frequency dependence; Frequency measurement; Frequency response; Instruments; Linearity; Microphones; Pressure measurement;
Conference_Titel :
Electrets, 2008. ISE-13. 13th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-1850-3
Electronic_ISBN :
978-1-4244-1851-0
DOI :
10.1109/ISE.2008.4814068
