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. Author manuscript; available in PMC: 2021 Apr 14.
Published in final edited form as: Hear Res. 2014 Mar 20;312:69–80. doi: 10.1016/j.heares.2014.03.002

Fig. 2.

Fig. 2.

Schematics of the measurement setups. In each case a sound source is coupled to the lateral (external) surface of the TM via a clear artificial ear canal, and a probe microphone determines the sound pressure at the boney tympanic ring. (A) Holographic measurement of the lateral TM surface: The blue light is the dispersed laser illumination beam. The red Optoelectronic Holograph box contains the CCD camera and its optics. (B) Holographic measurements of the medial surface while acoustically stimulating the lateral surface. The foam yellow plug sealed the lateral end of the artificial ear canal. (C) Laser-Doppler measurements of the umbo of the malleus during sound stimulation of the TM lateral surface. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)