What kind of siren tones are there?

[Robert Gift]

I have heard Hi-Lo
major third Example: E/C
major 2nd Example: D/C

Did I hear a double dissonant Hi-Lo?
F+G / C+D

Are there other intervals?
Thank you,

[Daniel]

Here's what I know about:

2nd: FS Model 76/77 vehicle siren
Min. 3rd: XT22, some 500 AT, some Allertor, Thunderbolt, UK sirens
Maj. 3rd: Model 2T, Hurricane, some Thunderbolt, some Allertor
Perf. 4th: Model 5T, Allertor, Banshee, Screamer, soome 500AT
Dim. 5th: HOR
Perf. 5th: 40V2T, Decot, T-135, Lion King
Min. 6th: Decot
8th (Octave): Most Sentry/Sterling dual tones

[Robert Gift]

Hey, thanks Daniel for your compilation.
Why the unusual intervals?

[Daniel]

My guess -- variance of opinion on which interval is most effective, or just one company trying to distance their siren from the competition.

[SirenEnthusiast360]

Here's what I know about:

2nd: FS Model 76/77 vehicle siren
Min. 3rd: XT22, some 500 AT, some Allertor, Thunderbolt, UK sirens
Maj. 3rd: Model 2T, Hurricane, some Thunderbolt, some Allertor
Perf. 4th: Model 5T, Allertor, Banshee, Screamer, soome 500AT
Dim. 5th: HOR
Perf. 5th: 40V2T, Decot, T-135, Lion King
Min. 6th: Decot
8th (Octave): Most Sentry/Sterling dual tones

You could start a one man siren band with that info.

[Daniel]

There is also that tri-tone British siren that had 10/12 on one side and 10/14 on the other, or something like that. I believe that on 50 Hz. that would generate a Bb/Db/E or Bb diminished chord.

[Robert Gift]

Fascinating!
Would love to hear something like that, especially rising and falling.
But I cannot identify the intervals when they move.

What are the ratios and their intervals produced?
I can't find it.
I know 10-12 = minor third.
Thank you,