Zhang J, Dunn F
Department of Electrical and Computer Engineering, University of Illinois, Urbana-Champaign 61801.
J Acoust Soc Am. 1991 Jan;89(1):73-9. doi: 10.1121/1.400370.
A thermodynamic method capable of determining the B/A value of 4-ml sample volumes is described. The method involves a procedure in which the static pressure of the sample is altered in a short period of time, to approximate an adiabatic process, during which the ultrasonic velocity is measured. The velocity change so determined is used to calculate the B/A value. The B/A measurement error is less than 0.7%.
描述了一种能够测定4毫升样品体积的B/A值的热力学方法。该方法涉及一个程序，即在短时间内改变样品的静压，以近似绝热过程，在此期间测量超声波速度。如此确定的速度变化用于计算B/A值。B/A测量误差小于0.7%。
