PSY280H1 Lecture Notes - Lecture 10: Sine Wave, Tuning Fork, Sound Energy
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Document Summary
What is sound: sound are created when objects vibrate. The waves can travel very far, not individual movements that travels very far, it travels within the medium. Waves traveling up and down, normal pressure in the middle: tuning fork. When it hits the water, waves generated by movements: sound waves. Sound travels 5x faster in water, as water is denser than air. Light travels a million times faster than sound. Physical qualities: amplitude: how tall the wave is. Intensity: sound energy that hits a particular area: frequency: # of time/sec, the period of the wave. Units: hertz (hz, decibel (db): a unit of measure for the physical intensity of sound, sound intensity on a linear axis, human hearing has a limited range of sound energy: 20 to. 20,000 hz: lower frequencies travel further in water. 3 main areas of the ear: outer ear, middle ear, outer ear. Allows the ear to capture the sounds that"s most important to us.
