T&T: Whistle Tones

[Frank Burrows]

My Standard Horizon LH-5 fog horn hailer is fixed at 400 hz. I gather that 
there is a range so different boats make different sounds. So if you can 
vary the frequency it would make sense to pick something other than 400 hz.

Frank Burrows

At 01:13 PM 5/7/2008 -0700, you wrote:
>Wow, you need to be a sound engineer to understand that.
>Do I gather that
>boats 36 to 60 feet need to have a horn that produces in the 250 to 525 hz