( ( ( ( ( An understanding ) ( of ( the ( physical properties ) ) ) ) ( of ( sound waves ) ) ) ( such ( as ( ( ( the amplitude ) , ) ( frequency ( , ( speed ( , ( wavelength ( , ( and intensity ) ) ) ) ) ) ) ) ) ) ) ; )
(ROOT (NP (NP (DT An) (NN understanding)) (PP (IN of) (NP (DT the) (JJ physical) (NNS properties))) (PP (IN of) (NP (JJ sound) (NNS waves))) (PP (JJ such) (IN as) (NP (NP (DT the) (NN amplitude)) (, ,) (NP (NN frequency) (, ,) (NN speed) (, ,) (NN wavelength) (, ,) (CC and) (NN intensity)))) (: ;)))
An understanding of the physical properties of sound waves such as the amplitude, frequency, speed, wavelength, and intensity;
(ROOT (S (NP (NP (DT The) (NN product)) (PP (IN of) (NP (NP (NP (DT a) (NN wave) (POS 's)) (NN wavelength)) (CC and) (NP (PRP$ its) (NN frequency))))) (VP (VBZ is) (NP (PRP$ its) (NN speed))) (. .)))