The speech intelligibility at the opera singing.

: The authors investigated the speech intelligibility at opera singing. They analysed several arias sung by soprano voices from Czech opera "Rusalka" (The water Nymph), from Puccini's opera "La Boheme" and several parts of arias from "Il barbiere di Siviglia" sung by baritone, tenor, bass and soprano. The sonographic pictures of selected arias were compared with a subjective evaluation. The difference between both authors was about 70%. The opinion is, that the singer's formant is not the only one problem having its role in the speech intelligibility of opera singing. The important role is played by the ability to change the shape of vocal tract and the ability of rapid and exact articulatory movements. This ability influences the shape of transients that are important at the normal speaking and also in the singing.