Using laser-doppler vibrometry to diagnose conductive hearing loss.

My co-workers and I have been testing the diagnostic utility of laser-Doppler vibrometry (LDV) measurements of the sound-induced velocity of the eardrum in patients with conductive hearing loss (Rosowski et al., 2003; Whittemore et al., 2004). LDV works by measuring the Doppler-shift in laser light reflected off of moving objects.

Hearing researchers have successfully used LDV to measure the sound-induced velocity of ossicles and eardrums in live animals for about 25 years. In the last 10 years, LDV devices have become sensitive enough to make measurements of the motion of the ...

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