4.3 Flashcards
Amplitude
The strength of a sound wave
Amplitude determines….
Loudness
Frequency
The number of complete wavelengths that pass a point in a given time
Pitch
A tone’s experienced highness it lowness; depends on frequency
We measure sounds in….
Decibels
Middle ear
The chamber between the eardrum and cochlea containing three tiny bones (hammer, anvil, and stirrup) that concentrate the vibrations of the eardrum on the cochlea’s oval window
Cochlea
A coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
Inner ear
The innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs
Process of how we can hear
Vibrating air ➡️ moving piston➡️fluid waves➡️electrical impulses➡️the brain➡️we hear!
Damage to hair called account for most…
Hearing loss
The brain detects loudness by the….
Number of activated hair cells
Place theory
In hearing, the theory that links the pitch we hear with the place where the cochlea’s membrane is stimulated
Frequency theory
In hearing he theory that the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone this enabling us to sense it’s pitch
Volley principle
Neural cells can alternate firing
We easily locate sounds when it is from either side of us….
But not when is it above, ahead, or behind
