sound vortex interaction
a sound mind in a sound body
infra-audible sound (=infrasonic sound)
rate of sound and attenuation of sound
sound absorption-sound insulation-vibration isolation technology
sound intensity and sound intensity level
sound navigation and ranging or sound radar
sound pressure and pressure level of sound
BCS theory (=Bardeen-Cooper- Schrieffer theory)
Brunauer-Emmett-Teller adsorption theory (= BET adsorption theory)
collision theory hard sphere theory
grey theory and fuzzy theory
hard sphere theory collision theory
idea in the theory philosophic theory