Time weighting setting
There are two kinds of time weighting for the LA-1240/1250/1350 such as FAST and SLOW, and three kinds for the LA-4350 such as FAST, SLOW and IMP. Select it by the panel switch [FAST/SLOW] (LA-4350: [FAST/SLOW/IMP]) according to measurement purpose.
Measurement purpose on Time weighting
Refer to the following table to select the time weighting according to measurement purpose.
|FAST||·Applicable to general sound measurement|
|SLOW||·Applicable to level measurement with little variation with time
·Applicable to simple measurement of average level of fluctuating sound
|IMP||·Applicable to measurement of impulsive sound|
Selecting time weighting
Each time you press the panel switch [FAST/SLOW] of the LA-1240/1250/1350, the time weighting changes as follows;
Each time you press the panel switch [FAST/SLOW/IMP] of the LA-4350, the time weighting changes as follows;