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A sound wave with high sound pressure (amplitude) or high sound particle displacement (amplitude) is a sound wave that has a high loudness.
The high point on a sound waveform is the point of maximum pressure, the pressure peak.
compression
the alternating areas of quickly moving high and low pressure
As the drum head moves one way, it disturbs the air molecules near it, causing some of them to bunch closer together, increasing the pressure. This higher pressure area starts to affect the air molecules near it, so the high pressure area starts to move away. When the drum head moves in the other way, air molecules will move toward it to fill the space created. This makes a low pressure region. The alternating high and low pressure regions is the sound wave, traveling through the air.
A sound wave with high sound pressure (amplitude) or high sound particle displacement (amplitude) is a sound wave that has a high loudness.
The high point on a sound waveform is the point of maximum pressure, the pressure peak.
compression
No. A sound wave is a pressure wave.
An ultrasonic wave is a sound pressure wave that has a very high frequency. The frequency is higher that what humans can hear.
the alternating areas of quickly moving high and low pressure
The region of compression is where all the particles of the medium are closer to each other than usual. In a sound wave that usually means that the pressure in that area of compression is slightly greater than the mean pressure of the material in which the sound wave is traveling.
how is the pressure varition in a sound wave amplified in human ear
As the drum head moves one way, it disturbs the air molecules near it, causing some of them to bunch closer together, increasing the pressure. This higher pressure area starts to affect the air molecules near it, so the high pressure area starts to move away. When the drum head moves in the other way, air molecules will move toward it to fill the space created. This makes a low pressure region. The alternating high and low pressure regions is the sound wave, traveling through the air.
The less dense areas created as a sound wave propagates are called rarefactions.
Puss on you
rarefraction