( ( Intensity ( of ( sound waves ) ) ) ( ( ( is typically ) ( measured ( in ( ( decibels , ) ( a ( logarithmic scale ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Intensity)) (PP (IN of) (NP (JJ sound) (NNS waves)))) (VP (VBZ is) (ADVP (RB typically)) (VP (VBN measured) (PP (IN in) (NP (NP (NNS decibels)) (, ,) (NP (DT a) (JJ logarithmic) (NN scale)))))) (. .)))
Intensity of sound waves is typically measured in decibels, a logarithmic scale.
(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)))))))))) (. .)))