14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

The Modulation of Formant Amplitude During Assimilation Processes of Homorganic and Quasi-Homorganic V1##V2 Sequences

Sylvia Moosmüller

Acoustics Research Department, Austrian Academy of Sciences, Vienna, Austria

In the present study, the contribution of the modulation of formant amplitudes for segmenting hornorganic or quasi-hornorganic V1##V2 sequences has been worked out. It can be shown that the modulation of the amplitude of one formant is sufficient to mark the segment boundary. This modulation can either appear as valley at the transition phase or as a sudden rise or fall of the amplitude. The support of a synchronous change in formant frequency is not necessary for segment boundary determination. I.e., even if formant frequencies have already assimilated totally, the segement boundary can still be determined by amplitude modulation. As soon as formant amplitudes start to rise or drop gradually or as soon as they exhibit the same strength over the whole signal, total assimilation has taken place and no segment boundary can be determined any more.

Full Paper

Bibliographic reference.  Moosmüller, Sylvia (1999): "The modulation of formant amplitude during assimilation processes of homorganic and quasi-homorganic V1##V2 sequences", In ICPhS-14, 1329-1332.