RELATIONSHIP BETWEEN ACOUSTIC NONLINEARITY AND THE BOUND AND THE UNBOUND STATES OF WATER.

C. M. Sehgal; B. Porter; J. F. Greenleaf

doi:10.1109/ultsym.1985.198639

RELATIONSHIP BETWEEN ACOUSTIC NONLINEARITY AND THE BOUND AND THE UNBOUND STATES OF WATER.

C. M. Sehgal, B. Porter, J. F. Greenleaf

Physiology & Biomedical Engineering

Research output: Contribution to journal › Conference article › peer-review

8 Scopus citations

Abstract

A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.

Original language	English (US)
Pages (from-to)	883-886
Number of pages	4
Journal	Ultrasonics Symposium Proceedings
DOIs	https://doi.org/10.1109/ultsym.1985.198639
State	Published - 1985

ASJC Scopus subject areas

Engineering(all)

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title = "RELATIONSHIP BETWEEN ACOUSTIC NONLINEARITY AND THE BOUND AND THE UNBOUND STATES OF WATER.",

abstract = "A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.",

author = "Sehgal, {C. M.} and B. Porter and Greenleaf, {J. F.}",

year = "1985",

doi = "10.1109/ultsym.1985.198639",

language = "English (US)",

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journal = "Ultrasonics Symposium Proceedings",

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AU - Sehgal, C. M.

AU - Porter, B.

AU - Greenleaf, J. F.

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N2 - A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.

AB - A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.

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