Acoustic Glossary

Definitions, Terms, Units and Parameters

U

 

 

Ultrasound

:   frequencies above the audible range, that is over 20 kHz.
 

 

Undamped Natural Frequency

:   the natural frequency of a structure.
 

 

Under-range

:   the input to the Sound Level Meter is too low for the current measurement range. Change the range.
 

 

Under-range %

:   percentage of time an under range occurred

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