Question

match the terms for longitudinal sound waves to their frequencies in hertz (hz).
instructions
infrasonic
audible
ultrasonic
less than 20 hz
between 20 and 20,000 hz
over 20,000 hz

Explanation:

• Infrasonic: Sound waves with frequencies less than \(20\space Hz\) are called infrasonic. These waves are below the lower limit of human audibility.
• Audible: Sound waves that humans can hear have frequencies between \(20\space Hz\) and \(20,000\space Hz\). This range is known as the audible range.
• Ultrasonic: Sound waves with frequencies over \(20,000\space Hz\) are ultrasonic. These waves are above the upper limit of human audibility.

Answer:

• Infrasonic \(

ightarrow\) Less than \(20\space Hz\)

• Audible \(

ightarrow\) Between \(20\) and \(20,000\space Hz\)

• Ultrasonic \(

ightarrow\) Over \(20,000\space Hz\)