User’s Manual
Model
407703A
Analog Sound Level Meter
Introduction
Congratulations on your selection of the Extech Analog Sound Level Meter, a versatile device that
measures sound pressure level in any acoustic environment. Sound/Noise Levels that are high or
low volume, high or low-pitched, broadband, intermittent, or continuous can easily be measured in
factories, schools, offices, airports, sound studios, theaters, auditoriums, automobiles, and in the
home. This precisely calibrated meter features a large, easy-to-read analog indicator and is battery
powered for portable use.
Specifications
Ranges
54 to 126dB in 7 ranges (referenced to 0.00002 bar)
Resolution Analog
Continuous
Accuracy
±2 dB at 94 dB sound level
Microphone type
Condenser Electret
Analog output
AC: 0.707Vrms (full scale)
Meter power
9V battery (120-hour battery life)
Dimensions/Weight
2.7 x 7.1 x 1.4" (68 x 180 x 36mm) / 5.1 oz. (160g)
Front Panel Description
1 Microphone
2 Range
switch
3 MAX
HOLD
button
4 SLOW/FAST
switch
5 A/C
weighting
switch
6 Analog
display
7 Battery
compartment
8 AC analog output jack
