The proposed experiment aims at testing the audiometric method developed earlier [Ordoñez et al., Acta Acustica (Beijing) 88, 450–452 (2002)] by evaluating if it is able to reproduce some of the known aspects of temporary threshold shifts (TTS), such as: Immediate sensitization, the 2 min maximum of the recovery and the half-octave shift of the peak of TTS. The subjects will be exposed to pure tones of 500 Hz and 2 kHz for 2 to 5 min and the levels will cover the range between 40- to 100-dB SPL. The aim is to induce a maximum of 15 dB of TTS. For showing the half-octave shift, the threshold will be determined from one octave below the exposure frequency to one octave above in 1/2 octave steps. For the 2 min maximum, the threshold will be measured at the most affected frequency and it can be determined continuously for 4 min after the exposure. Sensitization at probe frequencies lower than the exposure frequencies will be tested by measuring the threshold at 1/2 and 1 octave below the exposure frequency.