( ( ( the ( decibel scale ) ) ( for ( measuring ( ( the intensity ) ( of ( sound waves ) ) ) ) ) ) ; )
(ROOT (NP (NP (NP (DT the) (JJ decibel) (NN scale)) (PP (IN for) (S (VP (VBG measuring) (NP (NP (DT the) (NN intensity)) (PP (IN of) (NP (JJ sound) (NNS waves)))))))) (: ;)))
the decibel scale for measuring the intensity of sound waves;
(ROOT (S (NP (NNP Decibel)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NP (DT the) (NN intensity)) (PP (IN of) (NP (JJ sound) (NNS waves)))))))))) (. .)))