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A new method for estimating voice sounds transmitted to the chest wall in children and adolescents

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Abstract

A new method for estimating voice sound transmission to the chest wall is proposed. The spectral characteristics of voice-transmitted sounds have been estimated in children and adolescents. A total of 37 subjects aged 7–17 yers were examined. The frequency of the first spectral peak of the voice-transmitted sounds “tree, tree” (M ± SD) is 263.7 ± 7.82 and 253 ± 4.29 Hz at ages of 7–11 and 12–14 years, respectively. In male adolescents aged 15–17 years, this frequency is decreased to 100–150 Hz. The slope of the descending segment of the spectrum on the high-frequency side of the peak steadily increases on moving from the upper to the lower zones of the lungs, which may be related to the increase in the air content of the lung tissue. The difference between the amplitudes of the first and second spectral peaks of voice-transmitted sounds over symmetric regions of the chest on the right and left sides (Me(Q75-Q25)) is −0.1(11.0) dB and does not depend on age or sex, which can be interpreted as an average statistical symmetry of sound transmission.

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Original Russian Text © G.N. Bondar’, V.I. Korenbaum, 2006, published in Fiziologiya Cheloveka, 2006, Vol. 32, No. 5, pp. 41–46.

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Bondar’, G.N., Korenbaum, V.I. A new method for estimating voice sounds transmitted to the chest wall in children and adolescents. Hum Physiol 32, 533–538 (2006). https://doi.org/10.1134/S0362119706050057

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