饒瑞舜老師 音樂聲學一 文件 What is sound?
作者: 陳冠蓁 (10-30 15:19) 發表討論 列印 詳細資料

Sound

• Sound is produced by a vibrating source that causes the matter

around it to move.

• No sound is produced in a vacuum - Matter (air, water, earth)

must be present!

• The vibration of the source causes it to push/pull its neighboring

particles, which in turn push/pull its neighbors and so on.

• Pushes increase the air pressure (compression) while pulls

decrease the air pressure (rarefaction)

• The vibration sends a wave of pressure fluctuation through the air