≈700 Hz in Russian authentic singing phonation

This article presents data on the experimental measurement of the acoustic signal of the vocal speech of Russian ethnic singers, performed by the syllable articulation method. Three groups of performers took part in this study: traditional singers from various regions of Russia, professional singers and semi-professional art performers working in a folklorized manner, and the author’s students. The study found that in the authentic voice a stable presence of the oscillation frequency of ≈700 Hz is detected. There is reason to believe that this frequency, which is the first harmonic to the fundamental tone f0, in this case the first octave, and associated to low and medium singing formants, is important for the overtone-resonant coloring of the Russian traditional ethnic singing. This frequency is observed only in 40% of cases of a folklorized voice, while in an authentic voices – up to 90%. An experiment with a frequency gain of ≈700 Hz, conducted on students, showed the possibility of successful learning by the method of harmonic amplification to improve vocal sound. Based on the results of this experiment and the results of other researchers, the author came to the conclusion that frequencies of ≈700 Hz are associated with the biophysical properties of the human speech and respiratory system, which means that the given frequency is reasoned by a natural acoustic mechanism.