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Strange Histogram
PostPosted: Mon Feb 27, 2006 12:10 pm Reply with quote
arkie
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Joined: 04 May 2005
Posts: 13




Strage results gives sometimes View Calculation/Distribution chart in EASE4.1.0.7. I've catched one of them:

Direct SPL [dB] Distribution [%] Info
# 1.....89.00......0.98................4000 Hz (Third Octave)
# 2.....90.00......2.86................Considered: 100.0%
# 3.....91.00......9.08................0.0% < 88.00dB
# 4.....92.00.....18.63...............0.0% > 104.00dB
# 5.....93.00.....22.45...............Data points: 4900
# 6.....94.00.....21.57...............Variation Width: 2dB
# 7.....95.00.....23.49
# 8.....96.00.....27.51
# 9.....97.00.....26.57
# 10...98.00.....20.57
# 11...99.00.....13.16
# 12...100.00.....7.06
# 13...101.00.....4.27
# 14...102.00.....1.53
# 15...103.00.....0.00

I always thought that sum of percents must be 100, but in this table 199. Hopefully, that's the bug. Be careful.
Smile
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PostPosted: Mon Feb 27, 2006 2:23 pm Reply with quote
Stefan
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Joined: 19 Apr 2005
Posts: 167
Location: Berlin, Germany




Hello Arkie,

please send the project and the mapping file to us. This may be a bug.

However, from what I can see you seem to use a bin interval width of 2dB but the actual points are located 1dB apart. So, it seems logical that you count every value twice, because adjacent intervals overlap exactly by 50%.

But that is difficult to say based on this small amount of information.

Stefan
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