Evaluation of sensitivity of stiffness-sensitive electret microphones.
This paper presents an evaluation of the sensitivity of a new thin-film stiffness sensing technology that utilizes commercial electret microphones. The analysis allows comparison of commercial microphones for stiffness sensing applications. A mathematical method to estimate the stiffness sensitivity of a commercial microphone from its acoustic sensitivity is developed. Experimental results are presented on the use of the developed method in a sensor that estimates carbon dioxide concentration by utilizing a carbon nanotube thin film on an electret microphone.
Sivaramakrishnan
Shyam
S
University of Minnesota, Twin Cities, MN 55455, USA.
Rajamani
Rajesh
R
D000161:Acoustic Stimulation; D000162:Acoustics; D000327:Adsorption; D000465:Algorithms; D000669:Amplifiers, Electronic; D002245:Carbon Dioxide / Q000737:chemistry; D004867:Equipment Design; D008422:Materials Testing; D015233:Models, Statistical; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry; D012680:Sensitivity and Specificity; D014159:Transducers
D037742:Nanotubes, Carbon; D002245:Carbon Dioxide