The Influencing Factors in Acoustic Nonlinearity Parameter B/A Measurement

Abstract:

In this paper, the nonlinearity parameter B/A of ethanol has been measured under different emitted voltages, temperatures, multiple frequencies and stop-band attenuations. The experimental apparatus and technique used to measure B/A in ethanol was the finite amplitude insert-substitution method. This method was applied within the emitted voltages from 30.0 to 150.0V and at temperatures of between 22 and 45°C, and different frequencies at 1.0MHz, 2.25MHz, 3.5MHz, 5.0MHz and in attenuations from 30.0 to 120dB. Experimental results (Fig.4, Fig.5, Fig.6, Fig.7) show that: (1) The value of B/A has almost a linear increase with temperature and a linear decrease with frequency. (2) Parameter B/A is independent of the stop-band attenuations and has a little decrease with different emitted voltage.

• Periodical: Advanced Materials Research (Volumes 217-218)
• Pages: 419-425
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.217-218.419
• Online since: March 2011
• Authors: Sha Chen, Hai Jiang Zhu, Ping Yang
• Keywords: Ethanol, Finite Amplitude Insert-Substitution Method, Nonlinear Parameter B/A

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