Management and Organizational Studies 3305A/B Chapter : CH 5

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Chapter 5 : auditory, tactile and vestibular systems. Three different types of sound: the undesirable noise of the workplace, the critical warning of the alarm, the important communications through speech. Sound : a compression and rarefaction of the air molecules, which is a wave (acoustic) with amplitude and frequency. The amplitude of sound waves contributes to the perception of the loudness of the sound. The frequency contributes to the perception of pitch. The variation of sound pressure over time three of the many sine waves. Power spectrum: the horizontal position of each bar = frequency of the wave = hertz (hz, the heigh of each bar = amplitude of the wave = power. Power spectrum shows the range of frequencies in a given sound. Lowest perceptual frequency is 20 hz and the highest is 20,000 hz. People are sensitive to sounds in the range of 2,000 - 5,000 hz.

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