Temporary threshold shift (TTS) of hearing influenced by two couples energetically equivalent levels of wide-band noise in accordance with the equal-energy hypothesis (EEH) have been investigated.
   Differences in hearing threshold shift after insonificaty by two couples energetically equivalent levels of acoustic at TTS testing were identified.
   Exposure of the acoustic noise proves to be a biologicall dominant factor in comparison with the noise level.
   It has been shown that the EEH is not confirmed in case of when the equivalens index is 3.