November 1 - November 1 Wavelength determine color -Longer...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
November 1 Wavelength determine color -Longer = red / shorter = violet Amplitude determines brightness Purity determines saturation Hearing What causes different types of deafness? Conduction deafness : poor transfer o sounds from tympanic membrane to inner ear. - compensate with amplifier (hearing aid) Nerve deafness : caused by damage to hair cells or auditory nerve - Hearing aids useless in these cases, since auditory messages cannot reach the brain - Cochlear implant: electronic device that stimulates auditory nerves, not very successful. Stimulation deafness : Damage caused by exposing hair cells to excessively loud sounds. - typical at rock concerts - By age 65 40% of hair cells are gone Sound waves: rhythmic movement of air molecules Pitch: higher or lower tone of a sound Loudness: sound intensity. How do we detect higher and lower sounds? Frequency theory : as pitch rises nerve impulses of the same frequency flow into the auditory nerve Place theory : Higher and lower tones excite specific areas of the cochlea
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/01/2008 for the course PSYCHOLOGY 231 taught by Professor Allen-harris during the Fall '08 term at Milwaukee Area Technical College.

Page1 / 2

November 1 - November 1 Wavelength determine color -Longer...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online