DEVICE AND METHOD FOR IMPROVING SPEECH INTELLIGIBILITY FOR A RESPIRATORY MASK

摘要

FIELD: personal use items.;SUBSTANCE: this document describes device for improving speech intelligibility and respiratory masks, containing the device for improving speech intelligibility, as well as methods of improving intelligibility of speech transmission for a user of the respiratory mask. In one or more embodiments, said device and methods for improving speech intelligibility, described herein, comprise detecting acoustic energy within the first frequency range inside pure air space of the respiratory mask and delivering compensating acoustic energy outside of the pure air space using a loudspeaker. In one or more embodiments, said compensating acoustic energy has such a predetermined amplitude attenuation profile, that compensating acoustic energy has amplitude less than 6 dB more than said amplitude attenuation profile of the mask housing in at least 90 % of a predetermined range of attenuated frequencies.;EFFECT: improving speech intelligibility.;23 cl, 8 dwg