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Old 3rd March 2011, 02:42 PM   #1
Bkaasen is offline Bkaasen  Denmark
diyAudio Member
Join Date: Nov 2010
Default Flare freqency

Can anyone tell me if the "flare freqency" mentioned at this site: Single Driver Website
is the same as the Fs value for a driver.
Best regards
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Old 3rd March 2011, 04:35 PM   #2
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Join Date: Mar 2005
Location: UK
It's the tuning frequency of the horn. You can set it to any frequency you like, providing you design it properly to achieve the intended goals.
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Old 4th March 2011, 12:32 PM   #3
hm is offline hm  Europe
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Join Date: Feb 2004
Location: near Hamburg Germany
If you have AH, AM, l,
k still lacks the flare rate:

ln (AM / AH) / l = k

0.37 ~ 10 Hz
0.55 ~ 15 Hz
0.7 ~ 19 Hz
0.9 ~ 25 Hz
1.1 ~ 30 Hz
1.3 ~ 35 Hz
1.48 ~ 40 Hz

Important is the blind and real part of an expo horn:
example if you want 40 Hz you must take k=20 Hz
=1 oktave over k the horn plays.

look my constructions and measurements on my HP
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