( Yet ( , ( ( in ( ( the absence ) ( of resonance ) ) ) ( , ( ( ( the sound ) ( of ( these vibrations ) ) ) ( ( ( is not ) ( ( loud enough ) ( to discern ) ) ) . ) ) ) ) ) )
(ROOT (S (CC Yet) (, ,) (PP (IN in) (NP (NP (DT the) (NN absence)) (PP (IN of) (NP (NN resonance))))) (, ,) (NP (NP (DT the) (NN sound)) (PP (IN of) (NP (DT these) (NNS vibrations)))) (VP (VBZ is) (RB not) (ADJP (JJ loud) (RB enough) (S (VP (TO to) (VP (VB discern)))))) (. .)))
Yet, in the absence of resonance, the sound of these vibrations is not loud enough to discern.
(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)))))))) (. .)))