Great, thanks, that is a big help.

I was under the impression the sound would be emitted in a relatively uniform manner.
I'll have a look into the design further.

Hey all, I just wanted to say thanks for the help you gave me. I just came out of our client meeting and my lecturer loved the concept and selected it out of five others for further development and production of a working prototype model. http://itsonthemeter.com/Hosting/Poster%20Small.jpg http://it...

Thanks for the reply. I considered a a solar panel or tidal power system but I think i'm going to just use a sealed battery source. The system standby power consumption would be very low so a single battery should be feasible. I'd like to keep the system as self-contained as possible, things like wi...

Hi all, thanks for the replies. I've been looking at the concept a bit more today. Basically the idea is to have a device which attaches to buoy underwater. When the tide recedes prior to the tsunami the device is exposed to the air and a warning siren activates. The idea is that it can be used in v...

Yeah, it's an alert device. Think Tsunamis.

It has to be fairly loud, around a 1km radius of warning

Good evening, I'm currently researching the feasibility of a university project i'm working on and wanted to ask some advice from you guys. The project would involve the use of a siren which could be heard up to a radius of 1km (in a rural or light suburban environment) and would normally be part of...