( ( ( The intensity ) ( of ( the sound ) ) ) ( ( is ( measured ( in ( decibels ( -LRB- ( dB -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN intensity)) (PP (IN of) (NP (DT the) (NN sound)))) (VP (VBZ is) (VP (VBN measured) (PP (IN in) (NP (NP (NNS decibels)) (PRN (-LRB- -LRB-) (NP (NN dB)) (-RRB- -RRB-)))))) (. .)))
The intensity of the sound is measured in decibels (dB).
(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)))))))))) (. .)))