Radio Shack Sound Level Meter Owner's Manual page 14

33-2050.fm Page 14 Monday, April 17, 2000 2:04 PM
Follow these steps to select the desired
response, weighting, and range.
1. Set to
RESPONSE FAST
source you want to measure consists
of short bursts or if you want to mea-
sure only peak values. Or, set
to
RESPONSE SLOW
measure average sound levels.
2. Set to
WEIGHTING A
measure noise level or
to measure sound levels of musical
material.
3. Set to the highest setting (
RANGE
) then adjust it downward until
dB
there is significant deflection of the
needle. For the greatest accuracy,
always use the lower of any two pos-
sible settings.
For example, if
RANGE
and the meter reads
to so the meter reads
RANGE 70 dB
+3 , for an actual sound level of 73
dB.
Important: For meaningful readings,
any particular sound to be measured
must be at least 10 dB louder than
the background noise level.
14
Controls
if the sound
if you want to
if you want to
if you want
C
120
is set to
80 dB
, reset
–5