Ports I know that the actual number of ports on each rotor is pretty unknow so, I decided to calculate the ports for the Tokiwa siren and here are my results.. F3-6 port G3-7port A4-8 port (Very sharp) B♭4- ?8 port through gear reducer C4-9 port D4-10 port E4-?12 port F4-12 port G4-14 port A5-16 po...

Sirens were invented by Charles Cagniard de la Tour. Also, he wanted to use the siren as a warning alarm on ships. And yes, the siren was also used for music so they can measure exact frequencies

They were built for fire departments to call the firefighters. They also could've been used as warning devices but that mostly came later.

Kishiwada city hall had a 14 note music siren. The first two are correct.

The LK-2001 is an SRNB clone. The siren in the video was an SRN. It is still pretty funny with them hoping that no enthusiasts find it.

Happy new year! let's see how this year goes.

"Reverse Wired" in this case means that the blower was wired wrong. Blowers are only supposed to spin one way and if wired in reverse, they use the horn as the air intake. The way you can very easily tell is that the siren sounds extremely high pitched and sometimes quiet. The wind up can ...

it says "the firm hopes to develop export trade." if "the firm" refers to YAMAHA, then the music sirens haven't been shipped yet. even the title says that they're on Japanese factories. this is most likely a plan that the city had at one point but never was able to do it. If anyo...

It depends on the panel. On older Federal signal controllers like the AR/AF and PGA, they had a button that would activate the siren as long as the button was depressed. There is a test button on the SC controller but I don't know how it works.

I think it's owned by the fire department below it and it calls the firefighters to the station if a fire is reported. for if it's active? I have no idea.