Scanning laser Doppler vibrometry of the middle ear ossicles.
This paper describes measurements of the vibratory modes of the middle ear ossicles made with a scanning laser Doppler vibrometer. Previous studies of the middle ear ossicles with single-point laser Doppler measurements have raised questions regarding the vibrational modes of the ossicular chain. Single-point analysis methods do not have the ability to measure multiple points on the ossicles and, consequently, have limited ability to simultaneously record relative phase information at these points. Using a Polytec Model PSV-100, detailed measurements of the ossicular chain have been completed in the human temporal bone model. This model, when driven with a middle ear transducer, provides detailed three-dimensional data of the vibrational patterns of the middle ear ossicles. Implications for middle ear implantable devices are discussed.
Ball
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GR
Symphonix Devices, Inc., San Jose, CA 94037, USA.
Huber
A
A
Goode
R L
RL
D002102:Cadaver; D004301:Doppler Effect; D004429:Ear Ossicles / Q000502:physiology*; D004432:Ear, Middle / Q000502:physiology; D004867:Equipment Design; D006801:Humans; D007834:Lasers; D008297:Male; D008875:Middle Aged; D019736:Prostheses and Implants; D012016:Reference Values; D014159:Transducers; D014432:Tympanic Membrane / Q000502:physiology*; D014732:Vibration