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Correction Values for
Radio Shack SPL Meter.
10hz........+20db
12.5hz.....+16.5db
16hz........+11.5db
20hz........+7.5db
25hz........+5db
31.5hz.....+3db
40hz........+2.5db
50hz........+1.5db
63hz........+1.5db
80hz........+1.5db
100hz......+2db
125hz......+.5db
160hz......-.5db
200hz......-.5db
250hz......+.5db
315hz......-.5db
400hz......0db
500hz......-.5db
630hz......0db
800hz......0db
1k...........0db
1.25k......0db
1.6k........-.5db
2k...........-1.5db
2.5k........-1.5db
3.15k......-1.5db
4k...........-2db
5k...........-2db
6.3k........-2db
8k...........-2db
10k.........-1db
12.5k......+.5db
16k.........0db
20k.........+1db |
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Visit
Radio Shack's online store!
View a
printable
text version of meter correction values.
Quick Tip ~ For more
accurate results while testing loudspeakers, it is best to do the measurements
outdoors in a quiet and spacious area. Maybe in the front yard or a
backyard of your house. This helps avoid any unwanted reflections, wave cancellation,
constructive and destructive interference, and any standing waves which can
alter the frequency response of the actual signal. Do all measurements
at either 1/2 meter or 1 meter from the speaker baffle at 2.83 volts. You may use more power
if necessary to overcome outside noises from either wind, cars, birds,
etc. This may seem like a tedious task but the results you achieve
will be well worth it.
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