14 — Biophysics of the sensory system Flashcards
Which physical characteristics of the eye lens are changed during accommodation?
What is the resolution of an eye?
What is the physical and biological limit of the resolution of an eye?
What does it mean that photons are only triggers for photoreceptors?
Which receptor cells of the retina are responsible for color vision and vision under dim conditions.
What is the principle of Young-Helmholtz theory?
What is ERG?
What is the threshold intensity of hearing? Specify its value.
How does the intensity of sensation (loudness) changes as a function of the intensity of the stimulus?
What is the advantage of the phon scale compared to the bel (decibel) scale?
Give the Weber-Fechner law.
A sound with intensity J and frequency of 2000 Hz is produced by a sound generator. What is the loudness according to the phon scale?
What kind of relationship is represented by the isophonic curves?
Give the threshold values of hearing according to the phon scale for sounds whose frequencies are 1000 Hz and 2000 Hz, respectively.
What is the basis of the sone scale?
What is the mechanism of hearing by air conduction (also called ossicular conduction)?
What are the physical principles giving rise to an increased pressure on the foot plate of the stapes compared to the pressure of the original sound?
