( ( Safe ( Loud sounds ) ) ( ( ( are not ) amplified ) . ) )
(ROOT (S (NP (NNP Safe) (JJ Loud) (NNS sounds)) (VP (VBP are) (RB not) (VP (VBN amplified))) (. .)))
Safe Loud sounds are not amplified.
(ROOT (S (S (VP (VBN Amplified))) (, ,) (NP (PRP it)) (VP (VBZ becomes) (SBAR (S (NP (NNP louder)) (VP (VBZ happens) (VP (VB do) (NP (DT the) (NN sound)) (PP (IN during) (NP (DT a) (NN resonance)))))))) (. .)))