psych106-12

psych106-12 - Lecture 12(Feb 10 th AUDITION Lecture Outline...

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Unformatted text preview: Lecture 12 (Feb 10 th ): AUDITION Lecture Outline 1) Sound (and its similarities to light and vision ) 2) The Ear 3) The Basilar Membrane as a Frequency Analyzer 4) Auditory Space Perception AUDITION / HEARING Physical vibration of an object that produces local changes in air pressure (force/area), in the form of changes in the concentration of air molecules Both light and sound are composed of wavelengths ( λ ) What is Sound? (Spectral) LIGHT: “ λ ” ( nm/cycle, i.e., distance of one cycle) (e.g., 580 nm, “yellow”) Sound is a mechanical phenomenon (Light is an electromagnetic phenomenon) (Pure Tone) SOUND: “ frequency” = # λ /sec ( i.e., #cycles/sec, or Hz ) (e.g., 100 Hz) Note: Although light is usually described in the space domain, it is sometimes described in the time domain (i.e., frequency), which requires knowing the speed of light…. Humans hear 20 - 20,000Hz Dogs? Rats? http://www.freemosquitoringtones.org/ SOUND “ frequency” (cycles/sec, or Hz ) (e.g., 100 Hz) TWO TYPES OF SOUNDS (similar to color vision):...
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This note was uploaded on 09/15/2011 for the course PSYCH 106 taught by Professor Staff during the Spring '11 term at UCSD.

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psych106-12 - Lecture 12(Feb 10 th AUDITION Lecture Outline...

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