Kev rho tawm kev sib cav yog kev sib cais ntawm qhov khoom, xws li ib daig ntawm cov khoom siv, los ntawm qhov chaw ntawm kev vibrations . Kev vibration yog undesirable nyob rau hauv ntau puav, feem ntau txoj kev nruab thiab qhov chaw nyob, thiab txoj kev tau tsim los tiv thaiv kev xa mus ntawm kev vibration rau tej lub tshuab.
