PARAMETERIZATION OF THE VOICE SOURCE BY COMBINING SPECTRAL DECAY AND AMPLITUDE FEATURES OF THE GLOTTAL FLOW

A new method is presented for the parameterization of glottal volume v elocity waveforms that have been estimated by inverse filtering acoust ic speech pressure signals. The new technique, Parameter for Spectral and Amplitude Features of the Glottal Flow (PSA), combines two feature s of voice production, the AC value and the spectral decay of the glot tal flow, both of which contribute to changes in vocal loudness. PSA y ields a single parameter that characterizes the glottal flow in differ ent loudness conditions. By analyzing voices of 8 speakers it was show n that the new parameter correlates strongly with the sound pressure l evel of speech.