Fig. 7. The typical effect of body temperature, in one of three males measured, on the vibrations of the tympanal apodeme measured by laser Doppler vibrometry (LDV). There is no clear effect on the vibration velocity (presented in arbitrary units) and the phase angle, especially in the frequency range 3–8 kHz, where a strong effect of body temperature on auditory tuning and sensitivity was measured in the nervous system. The diagram on the right is of a the tympanum, tympanal apodeme and auditory organ, indicating the point where the laser beam was focused.