( Ultrasound ( ( ( is ( ( a sound ) ( with ( ( a pitch ) ( so high ) ) ) ) ) ( that ( it ( ( can not ) ( be ( heard ( by ( the ( human ear ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ultrasound)) (VP (VBZ is) (NP (NP (DT a) (NN sound)) (PP (IN with) (NP (NP (DT a) (NN pitch)) (ADJP (RB so) (JJ high))))) (SBAR (IN that) (S (NP (PRP it)) (VP (MD can) (RB not) (VP (VB be) (VP (VBN heard) (PP (IN by) (NP (DT the) (JJ human) (NN ear))))))))) (. .)))
Ultrasound is a sound with a pitch so high that it can not be heard 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))))))))))))) (. .)))