5 Feb
2006
5 Feb
'06
3:33 p.m.
On Sun, 2006-01-29 at 13:40 +0100, Wolfgang Woehl wrote:
fons adriaensen <fons.adriaensen(a)skynet.be>be>:
You should also get 900Hz. They're the sum & difference frequencies.
Apparently broadcast people called them sidebands? They're also the
reason that barbershop quartets get "ringing" chords.
I bumped into this page that explains non-linear distortion:
http://www.isvr.soton.ac.uk/SPCG/Tutorial/Tutorial/Tutorial_files/Web-heari…
bye
John
There are certainly instruments that produce
sound well
above 20 kHz. Now to get 'beats' between two of those
requires something non-linear - just summing them is not
enough. Our ears are non-linear at high sound levels, so
in a real performance this could happen. But I don't
think it will be noticeable at any sane sound levels.
Still don't understand the non-linear part here :/
I make 2 audio files with 400 and 500 hz sine tones and play
them along (out of ardour). There is clearly audible beat
frequency, a 100 hz hum and harmonics of that.