Sensation and Perception

Question	Answer
Pitch and loudness are	Psychological (perceptions)
Frequency and intensity are	Physical (sensations)
Pitch corresponds to	Frequency (hertz)
Loudness corresponds to	Intensity (decibels)
What are the two theories on sound encoding?	1) Place theory 2) Frequency theory
Place Theory	Different parts of the basilar membrane are stimulated for different frequencies
Frequency Theory	Cells fire in proportion to the frequency of a sound
What are the three causes of deafness?	1) Conduction 2) Nerve 3) Stimulation
Deafness by Conduction	Caused by damage to the eardrum or bones
Deafness by Nerve Damage	Loss of sensors (hair cells or damage to the auditory nerve)
Deafness by Stimulation	Overuse or overexposure to loud noise can damage hair cells (ringing in ears after a concert)
Doppler Effect	An increase (or decrease) in the frequency of sound as the source and observer move toward (or away from) each other Image: Doppler+Effect (binary/octet-stream)
Chemical Sensing	Certain molecules (keys) will be received by certain receptors (locks)
Smell is the only sense to bypass the	Thalamus
Where are smell receptors located?	Olfactory bulb Image: Olfactory+Bulb (binary/octet-stream)
What do the touch receptors pick up? And where are touch sensors receptors?	1) Pressure, pain, temperature 2) The skin
What does vestibular sense control? And where are the receptors located?	1) Balance 2) Semicircular canal
What does kinesthetic sense control? And where are the receptors located?	1) Body position 2) Muscles and tendons

Resource summary

	Created by Thomas Davis about 5 years ago