1. Hearing (Do you hear what I hear?)
Myers PSYCHOLOGY
Hearing
(Do you hear
what I hear?)

2. Hearing Audition - the sense of hearing Measured in decibels
Absolute threshold - zero

3. The Intensity of Some Common Sounds

4. Audition Amplitude (strength) determines loudness Frequency
the number of wavelengths determines Pitch - a tone’s highness or lowness

6. Ear is divided into 3 parts
Outer
Middle
Inner
See diagram

7. Audition- The Ear 1. Outer Ear - visible part & canal
2. Middle Ear - chamber between eardrum and cochlea
HAS three tiny bones
HAS (like a piston - hammer, anvil, stirrup)
that concentrate the vibrations of the eardrum on the cochlea’s oval window

8. Audition
3. Inner Ear
contains the cochlea, semicircular canals, and vestibular sacs
Cochlea
coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
Hair cells line the basilar membrane

9. I am sound, where do I go? Ear canal to Eardrum (vibrations)
Piston - HAS
Hammer
Anvil
Stirrup
Cochlea
Movement of Hair cells - basilar membrane
Auditory nerve
Neural message to the brain
Thalamus
Auditory cortex of Temporal lobe

10. How do we hear? 1. Place Theory (Helmholtz)
the theory that links the pitch we hear with the place where the cochlea’s membrane is stimulated;
best for high-pitched sounds

11. How do we hear? 2. Frequency Theory
the theory that the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone, thus enabling us to sense its pitch;
best for low-pitched sounds

12. How We Locate Sounds?

13. Locating sound
We locate sound by detecting differences in the intensity (loudness) and timing (speed) of the sounds received by each ear

14. Why can’t I hear? 1. Conduction Hearing Loss
hearing loss caused by damage to the mechanical system that conducts sound waves to the cochlea
Ex. Damage to eardrum, broken HAS

15. Why can’t I hear? 2. Sensorineural Hearing Loss
hearing loss caused by damage to the cochlea’s receptor cells or to the auditory nerve
also called nerve deafness
Crunched the shag carpet - hair cells perm. damaged

16. Audition
Older people tend to hear low frequencies well but suffer hearing loss for high frequencies 1
time 10
times
100
1000 32 64
128
256
512
1024
2048
4096
8192
16384
Frequency of tone in waves per second
Low
Pitch
High
Amplitude required for
perception relative to
20-29 year-old group

17. Cochlea implants - clip on Amazing brain
Sign language