A non-invasive Cochlear Microphonic measurement system

作者：Masood Asim; Teal Paul D^*; Hollitt Christopher

来源：MEDICAL ENGINEERING %26 PHYSICS, 2012, 34(8): 1191-1195.

DOI：10.1016/j.medengphy.2012.06.017

• Cochlear Microphonic
• Common Mode Rejection Ratio
• Driven right leg circuit
• Shielding
• Averaging
• Filtering

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 mu V). 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.

• 出版日期2012-10