sensation and perception - audition-auditory perception

Question 1

what stimulus is found in audition-auditory perception?

Answer 1

• sound waves

(ex: vibrations) which travel through a physical medium (air)

Question 2

characteristics

Answer 2

1. amplitude - how loud It is
   - measured in dB (decibels)
   - risk at 120+
2. purity - how intense the frequency is.
   - number of frequencies vary in voices and music/sounds
   - single frequency = most pure
   - more frequency = less pure
3. wavelength - measures the frequency
   - measured in hz (hertz)
   - range = 20 - 20k hertz

Question 3

characteristics

Answer 3

1. Receptor - hair cells in basilar membrane (found within snail shape in the ear)
2. outer ear - pinna-funnels and localizes sound (send sound to eardrum)
3. middle ear - the ossicles (happen, anvil, stirrup) in eardrum amplify sound)
4. inner ear - fluid filled cochlea which houses sound receptors and is involved with determining the pitch (frequency analysis)

Question 4

pathway of how sound travels to the brain

Answer 4

1. hair cells
2. auditory nerve
3. thalamus
4. auditory cortex in temporal lobe.

Question 5

name the two theories in the audition-auditory perception

Answer 5

1. place theory
   - place on basilar membrane which recognizes pitch.
   analogy: think of a harp
   - vibrations occur at different spots of basilar membrane
   - hair cells respond independently.
2. frequency theory
   - all hairs on membrane vibrate. analogy: think of a drumhead
   - whole membrane vibrates though the speed differs.

Question 6

what is the name of the system that processes hearing

Answer 6

the auditory system