Title :
Evaluation of sensitivity of stiffness-sensitive electret microphones
Author :
Sivaramakrishnan, Shyam ; Rajamani, Rajesh
Author_Institution :
Univ. of Minnesota, Twin Cities, MN, USA
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE
Conference_Location :
Minneapolis, MN
Print_ISBN :
978-1-4244-3296-7
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2009.5333332
