Measurement of Tympanic Membrane Motion in Normal Adults Using Laser Doppler Vibrometry
WANG Jie
ZHAO Fei
ZHANG Ying
LI Yongxin
Abstract：Objective To obtain normative data of tympanic membrane motion in adults using laser Doppler vibrome-try (LDV). Methods Between June to September in 2016, 30 subjects with normal tympanic membrane and normal pure tone hearing levels were enrolled in this study. Tympanic membrane motion magnitudes in response to 90 dB SPL pure tones at 400, 800, 1000, 1500, 2000, 2500, 3000, 4000, 5000, 6000 and 8000 Hz were measured using LDV. Results Tym-panic membrane motion at the umbo were observed with signal/noise ratios of more than 10 dB at all test frequencies. Two motion magnitude peaks were seen at 1000 Hz and 3000 Hz, and a notch at 6000 Hz. All measurements were completed within 10 minutes for each ear. Normal quiet breathing had little effects on the measurement and subjects experienced no ob-vious discomfort in this study. Conclusion The fine motion of the TM can be measured using LDV. Measurement in adults is easy, non-invasive and fast. LDV provides a means of precise measurement of middle ear sound transmission functions.
Keywords：motion of tympanic membranetympanoplastyair-bone gap
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 330-333 )