1. Sensation and Perception
The rest of the senses:
Hearing, taste, touch, smell
Sensation and Perception

2. Hearing Sound comes in waves, produced by vibration Sound=vibration
Length of wave determines pitch (highness or lowness of sound)
Height or amplitude determines loudness

4. Hearing Videos
How We Hear:
Cochlear Implant:

5. Hearing Tests Do-it-yourself Test: Frequencies:
Hold your hand up as though you are taking an oath. Rub your thumb and forefinger together. Do you hear a “scritching” sound?
Frequencies:

6. Penny Activity
Using the guide sheet, try to determine in what year the formula for pennies changed.
Older pennies have a fuller, richer, more bell-like sound
Newer pennies have a thin, “tinny” sound

7. Taste
Chemical Sense
Receptor cells on surface of tongue: respond to chemical structure of foods you eat
Five tastes:
Salty, sour, sweet, bitter and umami
Combination of taste and smell: they work together. Think about eating when you have a stuffy nose…

8. Taste
How We Taste
Super Tasters

9. Supertasters

10. Smell
Chemical Sense
Molecules given of by substances circulate in the air
Olfactory cells process
Taste + Smell = Flavor
Taste alone cannot give you flavor

11. How do we smell?
How we smell:

12. Touch Physical connection with outside world
Skin has receptors that respond to various kinds of stimulation
Pain, warmth, cold, and pressure
Skin sensations flow from these four basic skin senses
Itch= gentle stimulation of pain receptors,
Hot= simultaneous warm and cold,
Wetness= simultaneous stimulation of cold and pressure
Brain affects how you perceive pain

13. Phantom Limb Syndrome
The brain creates the perception of sensation in a limb that is no longer there
Common among amputees