On Mon, 19 Jan 2004 18:31:45 +0000, Laurence Payne
wrote:

On Mon, 19 Jan 2004 11:37:26 +0000, Don Pearce
wrote:

Its the same effect though. I agree 1 Hz isnt really a tone, but it is a
signal.

No, it is not even a signal. There is a variation in level at 1Hz, but
absolutely no acoustic energy whatever at that frequency. Have a look
at the two tones on a spectrum analyser and try to find anything at
all going on at 1Hz - you won't find it.

You can hear it though, can't you. Are you troubled by being able to
hear a variation in level - sometimes called a tremolo (did I spell
that right?)

Yes a variation in level - but no tone, and very specifically, no
signal. It simply isn't there to be heard.

d

_____________________________

http://www.pearce.uk.com