CINEMA 3 Lecture Notes - Lecture 16: Brainstem, Eustachian Tube, Tensor Tympani Muscle
Document Summary
Anything that can move air molecules can generate a sound (e. g. human vocal cords, guitar strings). When an object moves towards a patch of air, it compresses the air (increases the density of molecules). When an object moves away from a patch of air, it rarifies the air (decreases the density of molecules). Speed of sound = 343 m/sec frequency intensity. High frequency: more compressed and rarified patches in a specific amount of time. Low frequency: fewer compressed and rarified patches in a specific amount of time. The difference in pressure between compressed and rarified patches of air. How sound travels in the ear: the funnel of the visible portion of the ear is the pinna (lat. Inner ear pinna, auditory canal tympanic membrane, ossicles oval window, chochlea. An air-filled cavity containing the first elements that move in response to sound. Variations in air pressure are converted into movements of the ossicles.
