The more air-filled a structure is,the

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Quizplus · Accepted Answer

Sound waves are heard as percussion tones (called resonance)that arise from vibrations 4 to 6 cm deep in the body.The degree of percussion tone is determined by the density of the medium through which the sound waves travel.The more dense the medium,the quieter the percussion tone.The percussion tone over air is loud,over fluid less loud,and over solid areas soft.The more air-filled a structure,the lower its pitch,the louder its intensity,and the longer its duration.The more solid a structure,the higher its pitch,the softer its intensity,and the shorter its duration.

The More Air-Filled a Structure Is,the