Abstract
Sonic noise transmission from the mouth to six sites on the posterior chest wall is measured in 11 healthy adult male subjects at resting lung volume. The measurement sites are over the upper, middle and lower lung fields and are symmetric about the spine. The ratios of transmitted sound power to analogous sites over the right (R) and left (L) lung fields are estimated over three frequency bands: 100–600 Hz (low), 600–1100 Hz (mid) and 1100–1600 Hz (high). A R-L dominance in transmission is measured at low frequencies, with a statistically significant difference observed at the upper site. No significant asymmetry is observed in any measurement site at mid or high frequencies. A theoretical model of sound transmission that includes the asymmetrical anatomy of the mediastinal structures is in agreement with the observed asymmetry at low frequencies. These findings suggest that the pathway of the majority of sound transmission from the trachea to the chest wall changes from a more radial to airway-borne route over the measured frequency range.
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References
Cohen, A., andBerstein, A. D. (1991): ‘Acoustic transmission of the respiratory system using speech stimulation,’IEEE Trans.,BME-38, pp. 126–132
Goncharoff, V., Jacobs, J. E., andCugell, D. W. (1989): ‘Wideband acoustic transmission of human lungs,’Med. & Biol. Eng. & Comput.,27, pp. 513–519
Kraman, S. S. (1983): ‘Speed of low-frequency sound through the lungs of normal men,’J. Appl. Physiol.,55, pp. 1862–1867
Kraman, S. S., andAustrheim, O. (1983): ‘Comparison of lung sound and transmitted sound amplitude in normal men,’Am. Rev. Respir. Dis.,128, pp. 451–454
Kraman, S. S., andBohadana, A. B. (1989): ‘Transmission to the chest of sound introduced at the mouth,’J. Appl. Physiol.,66, p. 278–281
McMinn, R. M. H., andHutchings, R. T. (1988): ‘Color atlas of human anatomy’ (Yearbook Medical Publishers, Weert, Netherlands) p. 186
Ploysongsang, Y., Martin, R. R., Ross, W. R. D., Louden, R. G. andMacklem, P. T. (1977): ‘Breath sounds and regional ventilation,’Amer. Rev. Respir. Dis.,10, pp. 187–199
Rosner, B. (1982): ‘Fundamental of biostatistics’ (Duxbury Press, Boston) pp. 242–246
Vermarien, H., andVan Vollenhoven, E. (1984): ‘The recording of heart vibrations: a problem of vibration measurement on soft tissue,’Med. & Biol. Eng. & Comput.,22, 168–178
Welch, P. D. (1967): ‘The use of fast Fourier transform for the estimation of power spectra: a method based on time averaging over short modified periodograms,’IEEE Trans.,AE-15, pp. 70–73
Wodicka, G. R., Stevens, K. N., Golub, H. L., Cravalho, E. G., andShannon, D. C. (1989): ‘A model of acoustic transmission in the respiratory system,’IEEE Trans.,BME-36, pp. 925–934
Wodicka, G. R., Stevens, K. N., Golub, H. L., andShannon, D. C. (1990): ‘The spectral characteristics of sound transmission in the intact human respiratory system,’,BME-37, pp. 1130–1135
Wodicka, G. R., andShannon, D. C. (1990): ‘Transfer function of sound transmission in subglottal human respiratory system at low frequencies,’J. Appl. Physiol.,69, pp. 2126–2130
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Wodicka, G.R., DeFrain, P.D. & Kraman, S.S. Bilateral asymmetry of respiratory acoustic transmission. Med. Biol. Eng. Comput. 32, 489–494 (1994). https://doi.org/10.1007/BF02515306
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DOI: https://doi.org/10.1007/BF02515306