For highly attenuating materials, transmission measurement is difficult to use. We offer an acoustic impedance measurement capability which is valuable in detecting transition signatures.
Only one transducer is attached to an acoustic sample. Difference between excitation signal and received signal is detected by sensitive electronics.
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H. C. Choi, et al., A1 and A2 Transitions in Superfluid 3He in 98% Porosity Aerogel, Phys. Rev. Lett. 93, 145302 (2004). Read online.
Last modified on 23 December 2022