Abstract: Laser Doppler vibrometry is well established in hearingresearch, since this technique enables to monitor tinymotions in a touch free mode. The sensitivity tomeasure the amplitude of vibrations is at 0.5 nm at 100Hz and 0.05 nm at 1 kHz. Even when laser Dopplervibrometry is a technique with a high potential ofapplication in ENT, its use in clinical routine is rareso far. Beside other reasons this is due to themechanical dimensions and the weight of theinterferometer of a vibrometer. Here an optical set-upis presented which combines an operating microscope anda fiber guided laser Doppler vibrometer. The system iseasy to handle and fulfills the conditions forsterility. !3
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