LD	light/dark
LL	constant light
DD	constant dark
ZT	Zeitgeber time
CT	circadian time
ABR	auditory brainstem response
DPOAE	distortion product otoacoustic emission
TTS	temporary threshold shift
PTS	permanent threshold shift
OHC	outer hair cell
IHC	inner hair cell
SCN	suprachiasmatic nucleus
BBN	broadband noise
qRT-PCR	real-time quantitative polymerase chain reaction
4-HNE	4-hydroxynonenal