I have heard recordings of sirens in Israel and there seem to be a variety of types used. Some sound like the E-57, with 9 and 10-port variations. Others are much lower in pitch, like an STL-10 being run on 50 Hz. or a Model 2 running on 120 volts. These low-pitched sirens are slow-moving and very i...

Not to get nitpicky, but the dual-tone HOR has a port ratio of 7/10, not 7/9. A 7/9 ratio would be closer to a major 3rd (like a Model 2T).

Considering that the HOR Super Sirex was one of the largest sirens of its day, that is a very low installation. I would love to hear or even see one, since there are none of them in my part of the country. They have the strangest sound of any dual-tone siren -- a flatted-5th interval. To hear it, pl...

1. Carters/Secomak
2. Federal 2T22
3. HOR Super Sirex
4. Federal 1000T/1003
5. ACA Cyclone
6. Sentry 40V2T
7. Federal STL-10
8. H?rmann E-57
9. ACA Allertor
10. Sterling Little Giant

There actually is a mooing cow sound which some systems (Whelen, I believe) had as a test signal. Cannon Beach, Oregon, uses this on their test day instead of a siren tone to avoid spooking tourists, and it is followed by a voice message: "The cow has mooed, all is well." Apparently this w...

It is probably the local version of the compressor-powered German Martinshorn, tuned to a 6th interval rather than a perfect 4th, with one valve stuck open. I would think that the low tone would ordinarily alternate with the high tone. Sirens like this were once standard throughout Europe, but in th...

Not to jump on the same bandwagon, but give me a break. That post reads like the lyrics of a rap song. What has happened to the public schools in this country? By the way, there are NO PLURAL words in English that end with a "z."

I didn't know Sireno made anything other than vehicle sirens. The housing is less space-wasting than the Federal and seems like the rotor size is the same, minus two ports. Ditto for the background, though. Did they make any other models?

If you've ever had the privilege of listening to a real carillon, especially if it is being played by hand, you would never want to hear another electronic. An automatic instrument with about 40 bells was recently installed in downtown Vancouver, Washington, and it is beautiful to listen to. Another...

Yes -- an unfortunate consequence of our "quick and cheap" age. The church I grew up in had electronic bells made in 1954 by Schulmerich. Twenty-five bronze rods, about the size of chime rods in a mantel clock, were struck by tiny solenoids and amplified by guitar pickups to simulate bell ...