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Related Experiment Video

Updated: Jul 7, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody

Published on: September 27, 2024

Prosodic boundaries in alaryngeal speech.

M A van Rossum¹, H Quené, S G Nooteboom

¹Leiden University Medical Centre, Leiden, the Netherlands. M.A.van_Rossum@LUMC.nl

Clinical Linguistics & Phonetics

|March 1, 2008

Summary

Alaryngeal speakers struggle with consistent prosody. While tracheoesophageal speakers use lengthening and pauses, oesophageal speakers rely mainly on pauses, impacting listener comprehension of phrase boundaries.

Area of Science:

Speech and Hearing Sciences
Linguistics
Acoustic Phonetics

Background:

Alaryngeal speakers, who have undergone larynx removal, often exhibit variable control over fundamental frequency (F0) and duration.
Effective communication relies on prosodic cues, such as phrase boundaries, which can be challenging for alaryngeal speakers to produce consistently.

Purpose of the Study:

To investigate if proficient tracheoesophageal (TE) and oesophageal (OE) speech speakers consistently signal phrase boundaries.
To determine if alaryngeal speakers utilize the same hierarchy of acoustic boundary cues as non-alaryngeal speakers.

Main Methods:

A perception experiment was conducted where listeners identified prosodic boundaries in alaryngeal speech.
Acoustic analyses examined pre-boundary lengthening, pitch movements, and pauses in tracheoesophageal and oesophageal speech.

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Main Results:

Listeners demonstrated less accurate identification of prosodic boundaries in oesophageal speakers compared to tracheoesophageal speakers.
Tracheoesophageal speakers utilized pre-boundary lengthening and pauses, while oesophageal speakers primarily used pauses to mark boundaries.
Two oesophageal speakers produced inappropriate pauses within phrases, which were indistinguishable from prosodic pauses to listeners.

Conclusions:

Alaryngeal speakers' ability to convey phrase boundaries varies between speech types, with oesophageal speech posing greater challenges for listeners.
Specific acoustic cues like pre-boundary lengthening and pauses are employed differently by tracheoesophageal and oesophageal speakers.
Therapeutic interventions focusing on optimizing prosodic abilities may benefit alaryngeal speakers, particularly in mastering pause usage and boundary signaling.