Temporal characteristics of speech in simultaneous communication

Area of Science:

• Linguistics
• Speech Science
• Communication Studies

Background:

• Simultaneous communication involves producing speech alongside other modalities like sign language.
• Understanding temporal aspects of speech during simultaneous communication is crucial for effective interaction.
• Previous research has not fully explored temporal rule adherence in combined speech and sign.

Purpose of the Study:

• To investigate changes in speech temporal characteristics during simultaneous communication.
• To determine if temporal rules of spoken English are disrupted when combined with signed English or fingerspelling.

Main Methods:

• Ten speakers produced sentences under three conditions: speech alone, speech with signed English, and speech with signed English and fingerspelling.
• Key temporal features analyzed included sentence duration, CVC word duration, vowel duration, and pause duration.
• Consonantal effects on vowel duration were also examined.

Main Results:

• Speech rate consistently decreased across all simultaneous communication conditions compared to speech alone.
• The speech/sign/fingerspelling condition exhibited the longest durations, followed by speech/sign, then speech alone.
• Vowel duration was longer before voiced consonants than voiceless cognates, and low vowels were longer than high vowels, consistent across conditions.

Conclusions:

• Speakers naturally reduce their speech rate when engaging in simultaneous communication.
• Specific temporal rules governing English consonant and vowel perception are maintained during simultaneous communication.
• These findings highlight the adaptability of speech production while preserving essential phonetic timing.