![]() Therefore, Hertz (Hz) indicates the number of cycles per second that pass a given location. (Remember, each process has one compression and one rarefaction.) The frequency sound waves are measured in hertz. Hertz measures a sound wave’s cycles per second that pass a set point on the horizontal axis. Frequency: Hertz (Hz) measures a sound wave’s frequency. ![]() Zero decibels equates to the quietest sounds a human ear can hear. Lower volume equates to lower decibel (dB) levels a decibel measures sound intensity. The reverse is also true softer sounds produce waves with a smaller amplitude. When the wave’s amplitude is significant - as from a loud sound - the wave is high. It’s related to the relative volume of the sound.
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