Sorry it's taken so long, here are the frequencies for the 5500 and 6500 patterns:
5500Hz pattern
6500Hz pattern
- 4207
- 4945
- 6047
- 7699
Hopefully this will help to prove or make the mathematical calculations easier to nail down.
- 4980
- 5848
- 7137
- 9094
@Dhaval I have tones in 100Hz intervals so I can't really replicate the treatment, I can come relatively close though if you want to tell me your frequency. I'm sure it won't be long until a proper copy of the tone generator is on here though.
According to these two sets of actual frequencies, Excel estimates the formula for f1 to f4 as the followings:
f1=0.773*T-44.5
f2=0.903*T-21.5
f3=1.09*T+52
f4=1.395*T+26.5
For example, if your tinnitus is 5000Hz, then your f1 to f4 should be:
f1=0.773*5000-44.5=3820
f2=0.903*5000-21.5=4493
f3=1.09*5000+52=5502
f4=1.395*5000+26.5=7001
Please note that these estimations are only based on two sets of data, so they may not be accurate.