not at all (plus I never really heard beat frequency as a "tone", beating/a
detectable period yes, but not a bassy tone)
-----Message d'origine-----
From: Richard Dobson
Sent: Thursday, December 06, 2012 12:49 PM
To: A discussion list for music-related DSP
Subject: Re: [music-dsp] Ghost tone
Isn't this simply the resultant tone (beat frequency)? Given the partial
are approx 30Hz apart, it would make complete sense that the resultant
tone would be in that region. It would be affected by room responses,
and rotating the heard while lisetnting will change the perceived
intensity etc.
Richard Dobson
On 06/12/2012 05:50, Didier Dambrin wrote:
Hi,
Here's something to listen to:
http://flstudio.image-line.com/help/publicfiles_gol/GhostTone.wav
It's divided in 2 parts, the same bunch of sine harmonics in the upper
range, only difference is the phase alignment. (both will appear similar
through a spectrogram)
Disregarding the difference in sound in the upper range,
1. anyone confirms the very low tone is very audible in the first half?
2. (anyone confirms it's not speaker distortion?)
3. anyone knows about litterature about the phenomenon?
While I can understand where the "ghost tone" is from, I don't
understand why it's audible. I happen to have hyperacusis & can't stand
the low traffic rumbling here around, and I was wondering why mics
weren't picking it, as I perceive it very loud. I hadn't been able to
resynthesize a tone as nasty until now, mainly because I was trying low
tones alone, and I can't hear simple sines under 20Hz.
The question is why do we(?) hear it, why is so much "pressure"
noticable (can anyone stand it through headphones? I find the pressure
effect very disturbing).
Strangely enough, I find the tone a lot more audible when (through
headphones) it goes to both hears, not if it's only left or right.
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