Vector phase differences, not amplitudes, determine cancellation tone levels

Evidence

Using the corresponding data, the vector diagram outlined in Fig. 14.9 is constructed. It shows that the vector sum, with a length of 46 units corresponding to a level of 33 dB and with the phase of +218°, results from wavelet vectors of different length and - even more important - of different phases (directions). The vector sum is smaller than the sum of all the magnitudes of the vectors of the wavelets, because of the different vector directions. This reduces the total length. The phase of the vector sum depends mostly on the phase of the wavelets, which differs up to 180°, while their amplitude (length) does not vary strongly. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1599