http://www.youtube.com/watch?v=-9NHoSfQzPQ&fmt=18
The OP said it was near the DFW airport area, in Irving. If it's one of Dallas's sirens, it's probably a 1000.
Sounds just a little bit higher than the Mt. Airy 1000 in Cincinnati. Fort Worth has Whelens only, as far as i know, so it must be one of Dallas's sirens.md5 wrote:I'm almost 90% certain that what we are hearing is a 2001. If it was a thunderbolt 1000, I've never heard it's pitch go that high.
Yeah. That's what I was noticing in Jason's vids of the Cincy sirens in alert for tornado warnings.CJ wrote:Distance can change the pitch you hear things at too, can't it?Jpressman8 wrote:The frequency kind of sounds like high pitched 1000,but then again video can distort the sound at times.
Yes. Humidity,wind,night vs daylight,fog, and distance are all a factor.CJ wrote:Distance can change the pitch you hear things at too, can't it?Jpressman8 wrote:The frequency kind of sounds like high pitched 1000,but then again video can distort the sound at times.
Or it could theoretically be a 6-port chopper on setting 7. Nobody knows. Would be awesome to find out what makes the Mt. Airy 1000 so damn high pitched!Jpressman8 wrote:Yes. Humidity,wind,night vs daylight,fog, and distance are all a factor.CJ wrote:Distance can change the pitch you hear things at too, can't it?Jpressman8 wrote:The frequency kind of sounds like high pitched 1000,but then again video can distort the sound at times.
For example in a heavy fog you will hear the low frequency vs the high frequency as low pitches penetrate fog as high frequencies do not. That is why fog horns have a very low pitch. Here is one of my videos for comparison to this one. It sounds like a 1000 set on 7 with some over voltage maybe.
http://www.youtube.com/watch?v=b0bi-dt7nE4
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