4.64 temporary threshold shift; temporary hearing loss; TTS. Temporary increase in the threshold of audibility caused by exposure to high-intensity acoustic stimuli or ototoxic drugs. Unit, decibel, (dB).
Annotation 1 Temporary threshold shift is by definition reversible as measured by audiometric techniques.
Annotation 2 Temporary threshold shift may be superimposed on a permanent or “persistent” threshold shift.« Back to Standards Terminolgy Index