A brief study on the mixture rules of the acoustic non-linearity parameter B/A in binary biological mixtures |
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Authors: | Dong Yanwu Mao Feng Tong Jie |
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Institution: | Applied Acoustics Institute, Shaanxi Teachers University, Xian, Shaanxi, 710062, People's Republic of China |
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Abstract: | Using the improved thermodynamic method, the acoustic non-linearity parameter B/A of binary biological mixtures — such as pig blood, sheep blood and bovine blood — is measured in order to test the mixture rules proposed by Apfel and Sehgal. The results show that the B/A values of the above-mentioned blood decrease with an increasing volume fraction of water. The B/A value varies linearly with the volume fraction of protein. It is also shown that, treated as a binary mixture, the blood obeys the trend that the B/A value varies with the volume of water. This is in agreement with the rules proposed by Apfel and Sehgal. However, the measured B/A value is not exactly equal to that of the mixture rules. |
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Keywords: | ultrasound non-linearity parameter biological mixtures |
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