Gracey & Associates
Noise and Vibration
Glossary - U
GLOSSARY INDEX:
A B C
D E F
G H I
J K L
M N O
P Q R
S T U
V W X
Y Z
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
E&OE - please let us know about any errors or omissions - thanks
- Gracey & Associates 01933 624212
- BSI accreditation for noise and vibration instrument hire
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