| http://www.w3.org/ns/prov#value | - This process can be repeated for a number of tone frequencies, and using the measurements, a parameter such as velocity dispersion, ??, may be calculated as: ?? = v 2 - v 1 f 2 - f 1 , where v1 is the sound velocity measured at frequency f1, and v2 is the sound velocity measured at frequency f2.
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