By the cochlea: Differentiating and squaring of tone combinations, is one of the main characteristics of the "Heerens / de Ru" auditory model Applying physics makes auditory sense based on the correct description of the physical operation of the inner ear.
How does the phenomenon OAE fits in this model?
Thesis:
If a Spontaneous Oto Acoustic Emission [SOAE] is a reaction on earlier heard signals and is generated by tensor tympani / musculus stapedius, than that SOAE must have clearly traces of tone combinations evoked by the squaring process in the inner ear.
That tone combinations must exist of:
Two frequencies with in the middle of them a third frequency. The so-called “triplet”.
A singular frequency equal to the frequency differences in the triplet. The “pitch” belonging to the triplet.
Analysis of such an arbitrary SOAE spectrum: From the Nederlands Tijdschrift voor Natuurkunde September 2001 Emile de Kleine: Ear sounds on a “wall-bed” [Title translated]
There were a total of 39 peaks ranging between strong and very weak.
Determined spectrum Table: Measured frequency peaks in such arbitrary OAE - spectrum
Nr Freq. Peak
1 816 W
2 870 M
3 966 M
4 1000 VW
5 1056 S
6 1172 M
7 1240 VW
8 1286 S
9 1300 VW
10 1310 VW
11 1368 S
12 1608 VW
13 1674 S
14 1741 W
15 1947 M
16 2033 W
17 2097 S
18 2160 VW
19 2297 S
20 2564 VW
21 2650 W
22 2746 W
23 2830 S
24 3138 W
25 3202 S
26 3374 M
27 3532 VW
28 3668 VW
29 3795 W
30 3847 W
31 3987 S
32 4180 M
33 4288 VW
34 4452 W
35 4572 W
36 4660 S
37 4750 VW
38 4840 VW
39 4898 W
VW very weak
W weak
M moderate
S strong
Looking for all possible combinations:
Results:
3 triplets with accompanying pitch.
6 triplets without a pitch. But pitch frequency was lower than the lower boundary of 800 Hz.
Example of a very clear triplet + pitch, the strongest present combination:
Example triplet + pitch:
Pitch Peak: 6 f : 1172 Hz
Triplet Peaks: 13 - 23 - 31 f : 1674 - 2830 - 3987 Hz.
Triplet distances: 1156 respectively 1157 Hz.
Accuracy generally within 1 % of the pitch distance.
This cannot be an accident anymore !
