Talk:Ultra low frequency

From Wikipedia, the free encyclopedia

I'm interested to know why there are no man-made transmitters in this range. I know next to nothing about radio matters in general, but I assume there is limited bandwidth at this range which makes transmission a waste of time. But if that's true, why are there transmissions on SLF and ELF? — Trilobite (Talk) 03:01, 24 Nov 2004 (UTC)

Mainly because you'd need an extremely long and the resulting signal would have almost no energy. Another limitation is that it is a very slow way (in information per time) method of sending messages. The even lower frequency ELF (extremely low frequency) is used to communicate with submarines because it can penetrate sea water to an appreciable depth (which is difficult). I changed the article to say no communications transmitters. There are signals in that range but it is just noise released by slowly changing electrical signals. RJFJR 16:48, Apr 2, 2005 (UTC)

ULF is used to detonate explosives in mines. You don't need to lay wires which just get blown up anyways. Pogostix 02:08, 31 Jul 2005

I think that there is an error in the frequency described to take up this ULF band. Please change this article accordingly!