Audition - Audition The Sense of Hearing Chapter 9 1 Sound...

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1 Audition The Sense of Hearing Chapter 9 2 Sound Waves Sound waves are composed of compression and rarefaction of air molecules. Acoustical transduction: Conversion of sound waves into neural impulses in the hairs cells of the inner ear. 3 Sound Characteristics Timbre Quality Loudness Intensity Pitch Frequency Psychological Domain Physical Domain
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4 Frequency (Pitch) Frequency (pitch) is defined as vibration in number of cycles per second measured in hertz (Hz). Pitch is our perception of frequency. 5 Intensity (Loudness) Intensity (Loudness): Amount of energy in a wave determined by amplitude relates to perceived loudness. 6 Loudness of Sound 70dB 120dB
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7 Simple vs. Complex Sounds A simple sound frequency (or pure tone) is produced by a tuning fork. However most of the sounds are complex, e.g., piano. 8 Fourier Transformation A mathematical way of decomposing complex wave patterns into simple waves called the fundamentals. 9
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Audition - Audition The Sense of Hearing Chapter 9 1 Sound...

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