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Old 5th July 2006, 10:43 AM   #1
hm is offline hm  Europe
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Default sensational horn for 3" driver

a new project is ready
the trombone, a double horn
using the effect of
membran movement interlacing
and horn mouth distance,
down to 38 Hz with driver resonances
of 135 Hz ??!!

http://www.hm-moreart.de/105.htm

any comments?
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Old 5th July 2006, 12:15 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

I can't work out what happens to the terminus of the front horn,
does this radiate out of the top ? or simply join the other horn
at this point ? confusing..........

The two drivers Fs should be lower than 130Hz and Qts < 0.6.
The loading of the horn appears to be effective down to 40Hz.

/sreten.
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Old 5th July 2006, 12:27 PM   #3
hm is offline hm  Europe
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Default trombone

It happens!
I can´t help it it is nearly the same
listenable effect like the SAXOPHON.

measurements follows.

The diagram shows single simulations,
how looks the sum of it?

Yes, 2 oktaven below the resonance frequenz,
it might change the rules in future.

If it works, nobody needs 2-4 way constructions any longer.
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Old 5th July 2006, 02:31 PM   #4
sreten is offline sreten  United Kingdom
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Hi,

I now get it I think, the front horn exits via the slots in the cabinet sides ?

/sreten.
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Old 6th July 2006, 02:19 AM   #5
Nanook is offline Nanook  Canada
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Default sensational horn for an 10"

similar to a design I have started in some respects, thankfully I have prior art and emails to proove.(not so lucky with the "spiral horn mathematics" though)

Double tuned horns are quite interesting..how do yours sound..
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Old 6th July 2006, 05:43 AM   #6
maxro is offline maxro  Canada
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Interesting. Ok, so it's a bipole horn with differential tuning for each driver.(?) Wouldn't the out of phase resonances cancel each other out, creating a comb effect? What am I missing (besides an understanding of horn theory)?

max
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Old 6th July 2006, 09:49 AM   #7
hm is offline hm  Europe
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Default trombone

Nanook,
only dynamic is weeker as the Saxophon,

the sound is more astonishing as the Sax,
a new acoustic door is opened.

measurements follows.

maxro,
if you miss my horn-understanding ask your question,
and look my side.

How works a alphorn or a kontrafagott etc.
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Old 6th July 2006, 09:55 AM   #8
Rudolf is online now Rudolf  Germany
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The concept of filling in one comb filter with another seems interesting. But you need to proove it - at least with some simulation at listening distance. That cone movement diagram doesn´t satisfy really.

Did you think about taking out one driver at ~200 Hz?

Rudolf
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Old 6th July 2006, 10:07 AM   #9
hm is offline hm  Europe
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Hallo Rudolph,

how looks the sum of the single movement simulations?

the measurements next week will show.

The drivers are so close to each other that you listen
more to a toriodic system.

The simus show no bass below 70 Hz and 10 dB
to much at >200 Hz, the measurements will show
the opposite, the same as the SAXOPHON.
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