This threshold shift
level can be determined by equating the Z scores ([Z.sub.L] and [Z.sub.U]) under both methods.
The percentage of patients with sensorineural hearing loss and an average threshold shift
>25 dB in PTA was significantly higher in the older group (p<0.05).
ABR recordings 2h after exposure showed that acoustic over-stimulation induced great hearing loss (temporary threshold shift
, TTS) in both [Myh14.sup.-/-] mice and control groups; moreover, there were no significant differences between the two genotypes.
The effects may be in the form of temporary threshold shift
(TTS) lasting up to few hours or permanent threshold shift
, i.e., when temporary threshold shift
does not recover completely.
Evaluation of audiometric threshold shift
criteria for ototoxicity monitoring.
These levels potentially put the individual player and nearby golfing partners at risk of temporary or permanent threshold shift
It is called a temporary threshold shift
and usually disappears within 16-48 hours, after which a person's hearing returns to previous levels.
Rudmose (7) and Ward (8) independently demonstrated that when high intensity pure tones reach the cochlea in the 1 kHz to 3 kHz frequency range, the resulting threshold shift
occurs approximately a half to one whole octave above the pure tone exposure.
Fluctuations in susceptibility to noise-induced temporary threshold shift
as influenced by the menstrual cycle.
* Do you or your colleagues notice symptoms of acute noise exposure/temporary threshold shift
during or immediately after work in the area?
OSHA also clarified two matters relating to recording occupational hearing loss for general industry in conjunction with the final rule: computation of a standard threshold shift
for determining recordable hearing loss and how OSHA will treat an expected increase in the number of recorded cases resulting from new recordkeeping.