Sensation & Perception
Sensation & Perception
Sensation & Perception
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The Stimulus Input: Sound Waves<br />
Sound waves are composed of compression (more<br />
dense) and rarefaction (less dense) of air molecules.<br />
Acoustical transduction: Conversion of sound waves<br />
into neural impulses in the hair cells of the inner ear.<br />
Frequency (pitch):<br />
The dimension of<br />
frequency<br />
determined by the<br />
wavelength of<br />
sound.<br />
Wavelength: The<br />
distance from the<br />
peak of one wave to<br />
the peak of the next.<br />
Frequency (Pitch)<br />
Loudness of Sound<br />
120dB<br />
70dB<br />
Richard Kaylin/ Stone/ Getty Images<br />
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Intensity (Loudness):<br />
Amount of energy in<br />
a wave, determined<br />
by the amplitude,<br />
relates to the<br />
perceived loudness.<br />
Sound Characteristics<br />
Physical (psychological)<br />
� Frequency (pitch)<br />
� Intensity (loudness)<br />
� Quality (timbre)<br />
Intensity (Loudness)<br />
Quality (Timbre)<br />
Quality (Timbre): Characteristics of sound from a<br />
zither and a guitar allows the ear to distinguish<br />
between the two.<br />
Zither<br />
www.jamesjonesinstruments.com<br />
Guitar<br />
http://www.1christian.net<br />
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