Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: The Ridiculous Japa-Brazilian horn.
Post Subject: It is not ONLY the sound of the “walls”.Posted by Romy the Cat on: 3/6/2007
 Paul S wrote:
Some of those Altec horns were textbook examples of both types of bell-like resonance, where the body of the horn itself resonated and certain bell-like artifacts were created/amplified by/in the horns' mouths.
Hmmmmmmmmmmmmmmmmmm……..m…mmmm…. I have problems with it.

Sure those Altec “tuna cans” horns, and not “some of them” but all of them, had a LOT of problems and ringing was one of them. But what you begin to use the phrases “bell-like resonance” I wonder if we relays honest/correct in association the cause and results? Yes, the Altec “tuna cans” horns sounded like bells but increasing the crossover frequency for ½-3/4 octave practically get rid of that “bell-like resonance”. Well, from one perspective we slightly trance LF in the horn that reduces the forces that crater the resonance. But from another perspective if we model the identical behavior in a good wooden horn then we might recognize the near similar “bell-like resonance”. So, where the bell-like quality of sound coming from: from the walls of the horn or from the typical mistake of many horns newbie – the overloading a horn with bass?

I do not know the answer but I would propose in do not forget that too much bass in the horn bell crate effect that sonically sound very similar to “bell-like resonance”. Sure, that Japa-Brazilian horn with his 24dB/ocave 500Hz crossover should not have problems in 330Hz horn. However, let do not forget that it is not a real “horn”. This shape itself is a resonating chamber.

It takes a very simple test to see how it works – give this horn to a woman (or a tenor-men) and ask her to count loud from 1 to 20, putting the horn to her lips while she will be in the middle of counting. With a proper horn only volume should be changed but no the timber. The Altec “tuna cans” horns behave honorably even with voices of coloratura mezzo, where will be not dive to the frequency that would arose the walls. You might make asking that woman with horn to use different texts with “harder” consonants if you wish and to dump the “tuna cans horn” with her hands…. You will see eventually that it was not the sound of the “walls” (or mostly no the sound of the “walls”)

Rerurn to Romy the Cat's Site