Influence of the oxygen mask on long-time spectra of continuous speech

This paper evaluates the general influence of the oxygen mask on the long-time speech spectrum. The influence of the oxygen mask tvas determined through a comparison of the long-time spectra of continual speech from the mask and the long-time spectra of normal speech. The most evident changes are in the frequency range above 800 Hz. The presence of the oxygen mask results in a change of the relative ratio of maximal values of particular formant areas.