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Radio Shack SPL meter corrections?


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3 replies to this topic

#1 of 4 OFFLINE   David Strand

David Strand

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Posted July 04 2004 - 09:45 AM

I found the spreadsheets out there that has built in corrections for 1/3 octave or 1/6 octave measurements...

But does anyone have a corrections list for ALL frequencies between about 15 and 100? I have the radio shack analog spl meter. I tried searching this forum and the search tool didn't seem to want to cooperate.

I'm thinking about getting a BFD soon and got the snapbug worksheet and tones, but I would like to get an idea of my pre-equalized curve with 1hz resolution from about 15-100 or so.

Thanks!

#2 of 4 OFFLINE   ThomasW

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Posted July 04 2004 - 10:39 AM

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

#3 of 4 OFFLINE   Felix_F

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Posted July 04 2004 - 11:27 AM

Quote:
I would like to get an idea of my pre-equalized curve with 1hz resolution from about 15-100 or so.

I setup my BFD for 1Hz resolution from 10-100Hz by taking the correction coefficients that Thomas posted and prorating them for all necessary frequencies.

#4 of 4 OFFLINE   PaulT

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Posted July 04 2004 - 04:42 PM

Jeremy Stockwell Interpolations 10Hz – 80Hz in 1Hz Steps

Hz Correction
10...20.0
11...18.25
12...16.5
13...15.25
14...14.0
15...12.75
16...11.5
17...10.5
18...9.5
19...8.5
20...7.5
21...7.0
22...6.5
23...6.0
24...5.5
25...5.0
26...4.66
27...4.33
28...4.0
29...3.66
30...3.33
31...3.0
32...3.0
33...3.0
34...3.0
35...3.0
36...3.0
37...2.5
38...2.5
39...2.5
40...2.5
41...2.5
42...2.5
43...2.5
44...2.5
45...2.0
46...2.0
47...2.0
48...2.0
49...1.5
50...1.5
51...1.5
52...1.5
53...1.5
54...1.5
55...1.5
56...1.5
57... 1.5
58...1.5
59...1.5
60...1.5
61...1.5
62...1.5
63...1.5
64...1.5
65...1.5
66...1.5
67...1.5
68...1.5
69...1.5
70...1.5
71...1.5
72...1.5
73...1.5
74...1.5
75...1.5
76...1.5
77...1.5
78...1.5
79...1.5
80...1.5
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