( dB ( ( stands ( for ( ( decibels , ) ( ( a measurement ) ( of ( ( ( ( ( ( the intensity ) , ) or ) loudness ) , ) ( of ( a sound ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN dB)) (VP (VBZ stands) (PP (IN for) (NP (NP (NNS decibels)) (, ,) (NP (NP (DT a) (NN measurement)) (PP (IN of) (NP (NP (NP (DT the) (NN intensity)) (, ,) (CC or) (NP (NNS loudness)) (, ,)) (PP (IN of) (NP (DT a) (NN sound))))))))) (. .)))
dB stands for decibels, a measurement of the intensity, or loudness, of a sound.
(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)))))))))) (. .)))