Acoustic
Acoustic :
(1) (n.) Plot of range versus resolution of various geophysical data. Pertaining to sound. Generally, acoustic describes sound or vibrational events, regardless of frequency. The term sonic is limited to frequencies and tools operated in the frequency range of 1 to 25 kilohertz. See: Acoustic Coupler, Acoustic Log, Bel, Decibel, Elastic Wave, Hertz, Side-Scan Sonar, Synthetic Seismogram, Transit Time, Velocity. (2) (adj.) Geophysics. In geophysics, acoustic refers specifically to P-waves in the absence of S-waves (i.e., in fluids, which do not support S-waves, or in cases in which S-waves in solids are ignored). See: P-wave, S-wave
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