Electret microphone for use in photoacoustic spectrometer and photoacoustic spectrum of some rare earth oxide powders

Autor:	D.K. Rai, V N Rai, L B Tiwari, Surya N. Thakur
Rok vydání:	1982
Předmět:	Photoacoustic effect Electret microphone Materials science Spectrometer Microphone business.industry General Physics and Astronomy law.invention Optics law Electret Polarization (electrochemistry) business Photoacoustic spectroscopy FOIL method
Zdroj:	Pramana. 19:579-592
ISSN:	0973-7111 0304-4289
DOI:	10.1007/bf02846100
Popis:	We describe a new method for the polarization of an electret foil which has proved very convenient and yields a foil having very good performance in a microphone. The variations in the charge accumulation on the electret foil and its decay with time as well as the variation of the microphone sensitivity with different microphone parameterse.g. different thicknesses of the electret foil, different back plates and different polarization techniques has been investigated. The sensitivity of the home-made microphone is estimated as 1 mV/μbar. The working of this type of microphone and its comparison with a commercial microphone as used in a (laboratory made) single beam photoacoustic spectrometer is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8fd8bb4bb0bf61628234c24aa1d080d5 https://doi.org/10.1007/bf02846100 Zobrazit plný text záznamu Full text from SpringerLink