[Poll] Most Unusual Siren Sound

[SirenMadness]

Holy crap, I made this topic a long time ago (with a different account, of course).

I once saw this vid of a Decot and a Tbolt sitting right next to each other. Wish I could find it again. The Decot was an extremely musical sound... it was more uplifting than commanding!

That video was from the 2004 Siren Contest. I could have given you that recording, but the contest got deleted from my computer due to an urgent computer-clean-up. I think that it had an eighteen-to-sixteen port-ratio. Did that Decot have that ratio?

[Daniel]

I remember that video -- it was a 10/16 Decot, which gave a 6th interval instead of their more familiar 10/15 5th interval. It would be the same interval as that old 6/10 siren that is currently being restored by someone on this board, but that would be nearly an octave lower in pitch than the Decot.

[SirenMadness]

Sorry, I meant to say EIGHT, not eighteen. However, I'm wrong anyways.

Anyway, the weirdest sound to me would be something with a port-ratio of three and six. I'd love to create such tone with a siren.

[NanSiren]

Now I'm unsure if this was a single dual-tone unit or 2 single-toned ones, but when I was in Lenexa, KS about 13 years ago, I got the siren test. From my aunt's home, I heard and recorded a siren(s) with B4 and C#5 interval, almost like http://www.airraidsirens.com/mp3/yugoslavian.mp3. I think it was 2 different sirens, though. Anywho, it did sound scary.

[Robert Gift]

The tones of a 3/6 port siren would be an octave apart.
Presumably they would sound like one single note, indistinguishable from one another.

How unsusual hearing a B4 and C#5
Two separate sirens is my guess.
But Daniel knows of a Major 2nd interval siren.

Are you a musician, Nan?

I'm not. I'm an organist.

[SirenMadness]

I tried the ratio in NCH right now, and the tones are distinguishable from one-another surprisingly well enough.

[Robert Gift]

What is NCH?

From a real siren I bet the tones would blend so well together that they would not be the least bit distinguishable.

Even perfect minor and major third tones blend so well that I cannot hear them. I hear the resultant tone.

[SirenMadness]

NCH is a tone-generator software. Here is the link: http://www.nch.com.au/tonegen/index.html. I bought a free trial offer.

Once you have this software, put a frequency of, let's say, (300) Hertz with a frequency of (600) Hertz, and you will slightly hear two tones.

[Hacksaw]

I just downloaded NCH. It's fun to play with.

For an SD-10 in constant wail, try 487.5hz & 600hz at the same time. Use a sawtooth wave form since that's the closest.

Just a slight change in one of the frequencies sounds really weird.

[SirenMadness]

That ratio sounds somewhat like that of a Hurricane to me.

Also, if you want a haunting tone, try the two frequency numbers, 477.05 and 425, which gives you something like a nine-to-eight ratio!