Re: harmonic vs. inharmonic sounds (one last time)

["reinifrosch@xxxxxxxxxx" <reinifrosch@xxxxxxxxxx>]

Dear Kevin,

Your latest posting to the list contains the first of my private 
messages on difference tones, but not the second message which was a 
correction of the first one. Anyhow -- here is what I personally 
perceive: 

If I play on a synthesizer simultaneously two sine-tones of 
frequencies f_1 and f_2, softly at first and then with continually 
increasing volume, I hear difference tones if the ratio f_2 / f_1 is 
in the range from about 1.2 to 1.4.

For example, for f_1 = 400 Hz and f_2 = 500 Hz, I hear, at very low 
volume, no difference tone. Then, at slightly higher volume, I hear a 
cubic difference tone, f = 2f_1 - f_2 = 300 Hz. At still higher 
volume, I hear a first-order difference tone, f = f_2 - f_1 = 100 
Hz.

See, e.g., R. Plomp, "Detectability Threshold for Combination 
Tones", JASA 37 (1965) 1110-1123.

Reinhart.

Reinhart Frosch,
Dr. phil. nat.,
r. PSI and ETH Zurich,
Sommerhaldenstr. 5B,
CH-5200 Brugg.
Phone: 0041 56 441 77 72.
Mobile: 0041 79 754 30 32.
E-mail: reinifrosch@xxxxxxxxxx .

----UrsprÃngliche Nachricht----
Von: kevin.austin@xxxxxxxxxxxx
Datum: 16.03.2007 11:55
An: <AUDITORY@xxxxxxxxxxxxxxx>
Betreff: Re: harmonic vs. inharmonic sounds (one last time)

Thanks

I think my question is ... Do "you" perceive and/or hear, rather 
than
the third person neutral. Perhaps this is why I'm a composer and 
not
a scientist, I'm more interested in "you" then 'the' "them".

Best

Kevin