Vowel Dependence for Electroglottography and Audio Spectral Tilt

Abstract

The spectral tilt has been calculated for the vowels from audio signals and from the derivative of electroglottography (EGG) signals in a Swedish one-speaker corpus of 5277 sentences. Vowel dependence has been found for the audio spectral tilt but not for the EGG spectral tilt, which also gets steeper as the sound pressure level increases. The EGG spectral tilt values had an average standard deviation of 1.3 dB/octave and the corresponding standard deviation value for the audio spectral tilt was 2 dB/octave.