Evaluation of sensitivity of stiffness-sensitive electret microphones

Author

Sivaramakrishnan, Shyam ; Rajamani, Rajesh

Author_Institution

Univ. of Minnesota, Twin Cities, MN, USA

fYear

2009

fDate

3-6 Sept. 2009

Firstpage

2748

Lastpage

2751

Abstract

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.

Keywords

carbon compounds; carbon nanotubes; chemical sensors; elasticity; electrets; mechanical variables measurement; microphones; nanosensors; thin film sensors; acoustic sensitivity; carbon dioxide concentration; carbon nanotube thin film; solid state analyte sensor; stiffness measurement; stiffness-sensitive electret microphone sensitivity; thin-film stiffness sensing technology; Acoustic Stimulation; Acoustics; Adsorption; Algorithms; Amplifiers, Electronic; Carbon Dioxide; Equipment Design; Materials Testing; Models, Statistical; Models, Theoretical; Nanotechnology; Nanotubes, Carbon; Sensitivity and Specificity; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE

Conference_Location

Minneapolis, MN

ISSN

1557-170X

Print_ISBN

978-1-4244-3296-7

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/IEMBS.2009.5333332

Filename

5333332