NCT04921267

CompletedEarly Phase 1

Impacts of Training on Effortful Listening

Kansas State University Source

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Other study identifiers

Sponsor study identifier

IRB9406

Study Type

interventional

Actual enrollment (reported)

87

Locations

1 country

Sites

1

Timeline

Study Start

October 10, 2019

Actual (reported)

Primary Completion

May 31, 2020

Actual (reported)

Study Completion

May 31, 2020

Actual (reported)

Brief Summary

Human listeners will hear speech masked by single-talker speech before and after auditory training.

Registry Overview

Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.

Recruitment status: completed
Actual enrollment (reported): 87 participants
Study completion date: May 31, 2020
Actual (reported)
Listed locations: 1 countries · 1 sites

Trial Relationships

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Some registry-reported names shown below are not yet linked in this graph.

Study Timeline

Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.

Study Start
October 10, 2019
Actual (reported)
First Submitted
March 11, 2020
Actual (reported)
Primary Completion
May 31, 2020
Actual (reported)
Study Completion
May 31, 2020
Actual (reported)
First Posted
June 10, 2021
Actual (reported)

Last Updated: June 10, 2021
Status Verified: June 2021
Last Update Submitted: June 1, 2021

Conditions

Training Group

Outcome Measures

Primary Outcomes (4)

pretest EEG alpha power
power in the alpha-band
one day before training
posttest EEG alpha power
power in the alpha-band
one day after training
pretest accuracy
proportion correct for identifying speech
one day before training
posttest accuracy
proportion correct for identifying speech
one day after training

Study Arms (2)

trained group

EXPERIMENTAL

group receives training with sounds that correspond to simulated hearing protection

Behavioral: training

Control

NO INTERVENTION

group receives no training

Interventions

trainingBehavioral

training with filtered speech

trained group

Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.

Eligibility Criteria

Age18 Years+

Sexall

Healthy VolunteersYes

Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

normal hearing

You may not qualify if:

Sponsors & Collaborators

Kansas State University
Otherlead

Study Sites (1)

Kansas State University

Manhattan, Kansas, 66506, United States

Study Officials

Matthew Wisniewski, PhD
Kansas State University
PRINCIPAL INVESTIGATOR

Enrollment

87 participants (actual enrollment reported by the registry).

Study Design

Study Type: interventional
Phase: early phase 1
Allocation: RANDOMIZED
Masking: SINGLE
Who Masked: PARTICIPANT
Masking Details: Participant doesn't know what condition they are in.
Purpose: BASIC SCIENCE
Intervention Model: PARALLEL
Sponsor Type: OTHER
Responsible Party: PRINCIPAL INVESTIGATOR
PI Title: Assistant Professor

Study Record Dates

First Submitted

March 11, 2020

First Posted

June 10, 2021

Study Start

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hearing loss

Contact the study team to confirm eligibility.

October 10, 2019

Actual (reported)

Primary Completion

May 31, 2020

Actual (reported)

Study Completion

May 31, 2020

Actual (reported)

Last Updated

June 10, 2021

Record last verified: 2021-06

Data Sharing

IPD Sharing: Will not share

Source record

Download the complete ClinicalTrials.gov record imported by Syfrah, including fields not shown in this page. The registry may contain a newer revision.

Source: ClinicalTrials.gov.

JSON downloads include source attribution and retrieval details alongside the unchanged original record or the separately normalized values.

Registry identifier: NCT04921267
Data provider: ClinicalTrials.gov
Source updated: 2021-06-10
Normalization version: ctgov-legacy-1

Open registry record

Source retrieved: 2026-10-25 22:29:34 UTC

Locations

US(1)

Brief Summary

Registry Overview

Trial Relationships

Related Scientific Literature

Study Timeline

Study Start

First Submitted

Primary Completion

Study Completion

First Posted

Conditions

Outcome Measures

Primary Outcomes (4)

Study Arms (2)

trained group

Control

Interventions

Eligibility Criteria

You may qualify if:

You may not qualify if:

Sponsors & Collaborators

Study Sites (1)

Study Officials

Enrollment

Study Design

Study Record Dates

Data Sharing

Source record

Locations