On the Question About the Sound of Speech and Piano

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Resumo

The issue of auditory perception of speech and piano sounds, which have a relatively weak fundamental tone level against the background of high harmonics (formants of the vocal cords and string overtones, respectively), is considered. It is shown that the audible spectrum of these sounds is the spectrum of the interference envelope of oscillations of the corresponding harmonics. This spectrum contains the fundamental tone as the dominant sound, which is clearly heard in speech and music, while the formants and overtones, initially dominant in the sound spectrum of speech and music, primarily affect the timbre of the fundamental tone. At the hypothesis level, it is indicated that the vibration interference envelope is isolated (detected) as a result of the propagation of sound waves in the nonlinear fluid medium of the cochlea of the inner ear.

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Sobre autores

V. Zverev

Applied Physics Institute, Russian Academy of Sciences

Email: almal@ipfran.ru
Rússia, Nizhny Novgorod

A. Malekhanov

Applied Physics Institute, Russian Academy of Sciences

Autor responsável pela correspondência
Email: almal@ipfran.ru
Rússia, Nizhny Novgorod

Bibliografia

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  8. Есипов И.Б., Зверев В.А., Калачев А.И., Наугольных К.А. О низкочастотном параметрическом излучении звука // Акуст. журн. 1976. Т. 22. № 4. С. 606–608.

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2. Fig. 1. Spectrum of the piano sound using the example of the note A of the sub-contra octave.

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3. Fig. 2. Speech spectrum (quality image).

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4. Fig. 3. Spectrum of the bass note sound (Fig. 1) after linear detection.

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5. Fig. 4. Interference of four equidistant harmonics at frequencies of 100, 120, 140, 160 Hz: (a) – total signal and (b) – its envelope, (c) – spectrum of the total signal, (d) – spectrum of the envelope.

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