( ( ( The ( ultrasound waves ) ) ( used ( in ( Vascular ( Laboratory practices ) ) ) ) ) ( ( ( ( ( are ( ( very high ) ( frequency ( sound waves ) ) ) ) , ) ( far ( beyond detection ) ) ) ( by ( the ( human ear ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN ultrasound) (NNS waves)) (VP (VBN used) (PP (IN in) (NP (NNP Vascular) (NNP Laboratory) (NNS practices))))) (VP (VBP are) (NP (ADJP (RB very) (JJ high)) (NN frequency) (NN sound) (NNS waves)) (, ,) (ADVP (RB far) (PP (IN beyond) (NP (NN detection)))) (PP (IN by) (NP (DT the) (JJ human) (NN ear)))) (. .)))
The ultrasound waves used in Vascular Laboratory practices are very high frequency sound waves, far beyond detection by the human ear.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NN sound)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (S (NP (DT a) (NN wave) (NN frequency)) (ADJP (JJR higher) (SBAR (IN than) (S (NP (DT the) (JJ human) (NN ear)) (VP (MD can) (VP (VB detect) (NP (NN ultrasound))))))))))))) (. .)))