Phonetic tone signals phonological quantity and word structure

Area of Science:

• Phonetics and Phonology
• Linguistic Prosody
• Speech Perception and Production

Background:

• Languages use suprasegmental features like tone (fundamental frequency) and duration (quantity) to differentiate word meanings.
• Traditionally, tone and duration have been considered mutually exclusive phonological signaling mechanisms.
• Emerging evidence suggests co-occurrence of fundamental frequency changes with phonological quantity in languages like Finnish, Estonian, and Serbo-Croat.

Purpose of the Study:

• To investigate the role of tonal signaling in Finnish disyllabic word stems.
• To determine if phonological length is tonally distinguished within disyllabic sequences in Finnish.
• To examine the exploitation of the tone-duration association in Finnish speech production.

Main Methods:

• Experimental analysis of disyllabic word stems in Finnish.
• Acoustic analysis focusing on fundamental frequency (tone) and segmental durations (quantity).
• Perceptual and production experiments investigating the interplay of tonal and durational cues.

Main Results:

• Finnish disyllabic word stems are tonally signaled.
• Phonological length of the stressed syllable is tonally distinguished within the disyllabic sequence.
• The association between tone and duration observed in perception is actively used in Finnish speech production.

Conclusions:

• Tone plays a significant role in signaling word structure and phonological quantity in Finnish.
• The traditional dichotomy between tone and duration is challenged by findings in Finnish prosody.
• Speech production in Finnish systematically utilizes the integrated signaling of tone and duration.