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Chapter 2 quiz correct answers

Chapter 2 quiz correct answers - CD1025 Hearing Science Pop...

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CD1025 Hearing Science Name___________________________ “Pop” Quiz 2 Unit: Acoustics 1. Sound propagates well in many substances, whether solid, liquid, or gas, although the ____ SPEED _____ of sound may differ among them. On the other hand, outer space is not user- friendly for sound communication because there is no _________ MEDIUM _____________ * through which the disturbance called “sound” can propagate. {*No, the answer is not “air”.} 2. The phase of a cycle of a sound waves wherein the density of the molecules gets all bunched up is known as ______ CONDENSATION ________ * or the _______ CREST _______________** of the wave. {* Looking for words other than “compression” and “peak”.} 3. Wave propagation wherein the particles vibrate in the same direction as the direction of the motion of the wave front is known as ______ LONGITUDINAL _______ propagation. 4. Standing across the street from a friend, I must raise my voice to be understood. This condition roughly approximates a sound field (call the “free” far field) in which my mouth emits free progressive waves. That the sound pressure of the speech diminished so much at my friend’s ears (compared
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