A non-invasive Cochlear Microphonic measurement system

Asim Masood; Paul D Teal; Christopher Hollitt

doi:10.1016/j.medengphy.2012.06.017

A non-invasive Cochlear Microphonic measurement system

Med Eng Phys. 2012 Oct;34(8):1191-5. doi: 10.1016/j.medengphy.2012.06.017. Epub 2012 Jul 25.

Authors

Asim Masood¹, Paul D Teal, Christopher Hollitt

Affiliation

¹ School of Engineering and Computer Science, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand.

PMID: 22840560
DOI: 10.1016/j.medengphy.2012.06.017

Abstract

The Cochlear Microphonic is one of the electrical potentials generated by the ear in response to audible stimuli. It is very difficult to measure the CM non-invasively because it has a very small magnitude (less than 1 μV). A high Common Mode Rejection Ratio (CMRR) and very large bandwidth (5 Hz-20 kHz) biomedical amplifier system is presented to measure the signal. The system also uses a driven right leg circuit to increase the CMRR.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Acoustic Stimulation
Acoustics / instrumentation*
Amplifiers, Electronic*
Cochlea / physiology*
Evoked Potentials, Auditory*
Humans