S&P5 - Sound 14:32 Big part of the wayfundamental,...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Sound 14:32 Big part of the way-fundamental, little part-harmonics Fourier analysis: break complex waveform into its pure tone components o very useful for analyzing speech Shorter wavelengths: high pitch When damage hearing high freq lost first Amplitude-loudness Frequency-pitch Complexity-timbre (harmonics) Different pitches represented in different areas in auditory cortex – does own  Fourier Synthesis Wernickes area get imput from auditory cortex and puts together to create  meaning from sounds Tonitus-ringing in the ears Caffeine, alcohol, saturated fat (makes membrane stiff and hurts hair cells, not as  fluid), and antibiotics- really audotoxic, elevate threshold for hearing damage Auditory cortex- deep in temporal lobe Loudness scale in decibels (logarithmic scale) Air buds bad because sound can’t bounce out and dissipate Hear from 20-20K hertz Minimum Audibility Curve Cochlear implants to give input in order to hear
Background image of page 1

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

View Full DocumentRight Arrow Icon
Tadoma Method-point fingers on larynx and lips to know what your saying (Helen  Keller invented) More lateralize eyes can’t see depth as well Two ears is to localize sound- timing difference or intensity difference to know  location o When higher pitched harder to hear Swivellable ears no ridges  o ridges allow for correct bouncing of  pinna  (whole outside of ear) Inferior collucus- where hearing goes Some people can move their pinna around and a lot of animals- shape has to do  with niche Acuteness of hearing has to do with hair cells Auditory meatus-hole(?) Engineer pinnas Lots of birds don’t have pinnas at all Cerumen-ear wax, bug repellent and lubricant Some people have really active ceruminous glands o Swimmer’s ear can be a cause of too much wax Otoscope- instrument to look thru ear Short tube – babies – susceptible to middle ear infections
Background image of page 2
Music Perception 14:32 o Components of music o Pitch o Timbre- ability to pick out different tones o Loudness o Tempo Pitch o Human auditory range-20-20,000 Hz Human voice (4,000-7,000 Hz) o Octaves and scales o Humans have a limited voc al range:  6-octave ranges o Place Theory (Helmholtz) encode for different pitches-certain freq coded at diff  parts of cochlea (4,000 Hz, 20,000) o Base wider and stiffer and more sensitive to higher frequency o Further toward the apex is more flexible and low freq o Lose hair cells at the base when get older o Temporal theory (Rutherford)- 25 Hz=25 vibrations/sec o Neurons (including auditory neurons) have different limits, firing rates o Refractory period (can’t keep up after 1,000 Hz) Volley Principle-groups of neurons share in the firing rate
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/26/2011 for the course PSYC 4120 taught by Professor Br during the Spring '09 term at University of Georgia Athens.

Page1 / 16

S&P5 - Sound 14:32 Big part of the wayfundamental,...

This preview shows document pages 1 - 4. Sign up to view the full document.

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