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Selective Listening in Multi-Source Environments : = Understanding the Role of Rhythm in Young and Older Listeners.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Selective Listening in Multi-Source Environments :/
Reminder of title:	Understanding the Role of Rhythm in Young and Older Listeners.
Author:	Pearson, Dylan V.
Description:	1 online resource (144 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: A.
Contained By:	Dissertations Abstracts International85-04A.
Subject:	Acoustics. -
Online resource:	click for full text (PQDT)
ISBN:	9798380609579

Selective Listening in Multi-Source Environments : = Understanding the Role of Rhythm in Young and Older Listeners.
Pearson, Dylan V.

Selective Listening in Multi-Source Environments :Understanding the Role of Rhythm in Young and Older Listeners. - 1 online resource (144 pages)

Source: Dissertations Abstracts International, Volume: 85-04, Section: A.

Thesis (Ph.D.)--Indiana University, 2023.

Includes bibliographical references

Understanding speech in complex, multi-source listening environments is a challenging component of everyday communication. The temporal patterning and rhythmic structure of both target (to-be-attended) signals and competing background (unattended) signals are crucial to navigating these acoustic environments. Previous research has shown that altering the natural rhythmic structure of target speech degrades speech recognition (the target rhythm effect), while the same alterations to competing backgrounds facilitate speech understanding in certain conditions (the background rhythm effect). This role of rhythm is in general agreement with attentional entrainment where internal attentional rhythms are entrained by the rhythmic structure of external stimuli. However, the process of attentional entrainment in the presence of multiple competing rhythmic signals is not fully understood.The current dissertation develops a vowel sequence identification paradigm designed to probe attentional entrainment in multi-source environments, while avoiding potential confounds associated with using naturally produced speech stimuli. In this paradigm, listeners identify synthetic vowels within a target sequence presented alongside a competing background sequence. The target and background sequences allow for independent rhythm alteration without distorting the acoustic qualities of the stimuli, while preventing temporal overlap of stimuli. With this paradigm the dissertation pursues three goals: (1) replicating the target and background rhythm effects using highly-controlled stimuli with minimal linguistic information, (2) investigating the conditions where a background rhythm effect is elicited and (3) identifying potential age-related differences in the sensitivity to rhythmic information on multi-source listening. In two experiments both young adult and older listeners were recruited to investigate the role of rhythm separately in the target and competing background sequences. The results of these experiments were able to replicate the target and background rhythm effects found in previous studies, expanding the role of rhythm in selective listening beyond speech. Further, the background rhythm effect depended on the background sequence consisting of synthetic vowels similar to the target vowels. Finally, the identification performance of older listeners exhibited less sensitivity to rhythm alteration in both the target and background. These results demonstrate the importance of considering rhythm and attentional entrainment in understanding the difficulties in navigating multi-source environments, especially among older listeners.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798380609579Subjects--Topical Terms:

670692
Acoustics.
Subjects--Index Terms:

AttentionIndex Terms--Genre/Form:

554714
Electronic books.

Selective Listening in Multi-Source Environments : = Understanding the Role of Rhythm in Young and Older Listeners.
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