Parameters of auditory feedback

Area of Science:

• Speech production and acoustics
• Auditory feedback mechanisms
• Vocal control in adult speakers

Background:

• Auditory feedback is crucial for speech regulation.
• Various methods exist to manipulate auditory feedback.
• Understanding these manipulations' effects is key to speech science.

Purpose of the Study:

• To investigate the distinct effects of three auditory feedback conditions on adult speech.
• To determine if different feedback methods yield comparable results.
• To assess the generalizability of findings across feedback types and speech parameters.

Main Methods:

• Adult speakers were exposed to three auditory feedback conditions: Lombard effect, sidetone amplification, and delayed auditory feedback (DAF).
• Vocal intensity and syllable rate were measured under each condition.
• Statistical analyses were performed to compare effects across conditions.

Main Results:

• All three feedback conditions significantly altered vocal intensity.
• Only delayed auditory feedback (DAF) resulted in significant changes to syllable rate.
• Performance across the different feedback conditions was not correlated, indicating unique effects.

Conclusions:

• The effects of auditory feedback on speech are method-dependent.
• Delayed auditory feedback (DAF) uniquely influences speech rate.
• Generalizing findings about auditory feedback requires consideration of the specific technique and speech parameter investigated.