9/29/09 Performing a Sound Level Measurement 9-13
Linearity Range
When making a measurement, the upper and lower linearity
range limits of the instrument for the setting presently in
effect are indicated by the dark regions with light numbers
as indicated below.
Changing the range (ISM and LOG Modes) or gain (SSA
Mode will change these limits. For very low (high) level
measurements, it may be necessary to utilize a microphone
having a higher (lower) value of sensitivity in order to
perform a measurement within the linearity range of the
instrument.
Upper Limit of Linearity
Lower Limit of Linearity Range