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ClinicalTrials.gov public records Last synced Jul 22, 2026, 5:49 AM EDT

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Showing 1–24 of 26 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Speech Intelligibility Clear all
Recruiting Not applicable Interventional

Expiratory Muscle Strength Training for Hypernasal Speech in Children

NCT05492266
View directory record Official record
Conditions
Velopharyngeal Insufficiency, Velopharyngeal Incompetence Due to Cleft Palate, Inadequate Velopharyngeal Closure, Palatopharyngeal Incompetence, Hypernasality
Interventions
Expiratory Muscle Strength Training, Maintenance Training
Device
Lead sponsor
Noel Jabbour
Other
Eligibility
5 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Not applicable Interventional

Benefits of Choir for Older Adults With Unaddressed Hearing Loss (WP2)

NCT06580847
View directory record Official record
Conditions
Hearing Loss, Age-Related, Speech Intelligibility, Psychosocial Functioning
Interventions
Group Singing, Audiobook Club
Behavioral
Lead sponsor
Toronto Metropolitan University
Other
Eligibility
60 Years and older
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

MyoVoice to Restore Natural, Hands-free Communication to Individuals With Vocal Impairments

NCT04762043
View directory record Official record
Conditions
Rehabilitation of Speech and Language Disorders, Speech Disorders, Speech, Alaryngeal, Communication Aids for Disabled, Speech Perception, Speech Intelligibility
Interventions
Experimental System: MyoVoice, Reference System: Electrolarynx
Device
Lead sponsor
Altec Inc.
Industry
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 22, 2024 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Intelligibility Assessment for Parkinson's Disease

NCT04829006
View directory record Official record
Conditions
Parkinson Disease
Interventions
Understand Me For Life
Device
Lead sponsor
Long Island University
Other
Eligibility
30 Years to 85 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2022 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Results available

Benefits of Assistive Listening Device for Speech Intelligibility

NCT05072470
View directory record Official record
Conditions
Hearing Loss
Interventions
Roger microphone, Phonak Audeo hearing aid
Device
Lead sponsor
Sonova AG
Industry
Eligibility
18 Years to 80 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Feb 12, 2023 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Perceptual Training to Improve Listeners' Ability to Understand Speech Produced by Individuals With Dysarthria

NCT04897711
View directory record Official record
Conditions
Dysarthria, Intelligibility, Speech
Interventions
Perceptual Training
Behavioral
Lead sponsor
Utah State University
Other
Eligibility
18 Years to 80 Years
Enrollment
217 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
2
States / cities
Tallahassee, Florida • Logan, Utah
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Results available

Predictors of Speech Ability in Down Syndrome

NCT05016037
View directory record Official record
Conditions
Speech Intelligibility Intervention in Down Syndrome
Interventions
Lexically based speech recast
Behavioral
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
4 Years to 17 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 2, 2025 · Synced Jul 22, 2026, 5:49 AM EDT
Terminated Not applicable Interventional Results available

Down Syndrome Speech Intelligibility Diagnostic Treatment Study

NCT04059354
View directory record Official record
Conditions
Down Syndrome
Interventions
Speech therapy addressing phonology and motor learning
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
7 Years to 16 Years · Male only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 6, 2025 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Speech Perception and High Cognitive Demand

NCT04997577
View directory record Official record
Conditions
Speech Intelligibility, Aging
Interventions
Auditory-cognitive training paradigm, Auditory training paradigm
Behavioral
Lead sponsor
University of Maryland, College Park
Other
Eligibility
65 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
2
States / cities
College Park, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 7, 2025 · Synced Jul 22, 2026, 5:49 AM EDT
Not listed No phase listed Observational

Subthalamic Nucleus Deep Brain Stimulation in Speech Study

NCT05493670
View directory record Official record
Conditions
Parkinson Disease, Dysarthria
Interventions
Not listed
Lead sponsor
Jeremy Greenlee
Other
Eligibility
21 Years to 84 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 21, 2023 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Phase 1 Interventional

Improve Speech Using an In-the-ear Device in Parkinson's Disease

NCT00488657
View directory record Official record
Conditions
Parkinson's Disease, Dysarthria
Interventions
SpeechEasy Model ITC
Device
Lead sponsor
Rush University Medical Center
Other
Eligibility
25 Years to 90 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 17, 2013 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional

Speech Intelligibility and Cognition: Are Inpatients Impaired by Noise?

NCT00695162
View directory record Official record
Conditions
Auditory Perception, Memory, Hearing Impairment
Interventions
quiet, non-speech noise, speech noise
Other
Lead sponsor
Portland VA Medical Center
Federal
Eligibility
18 Years to 88 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 15, 2011 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional

Facilitating Patient Communication During Noninvasive Ventilation

NCT04912544
View directory record Official record
Conditions
Noninvasive Ventilation, Speech Intelligibility
Interventions
Noninvasive Ventilation Mask Microphone
Device
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 31, 2022 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Clarity in Motion Phase-1 Perceptual Study of Speech Intelligibility

NCT07020728
View directory record Official record
Conditions
Healthy
Interventions
Solo: Unmasked Speech Stimuli, Raw: Fully masked speech--no motion stimuli, StatScrub: Extracted Speech--no motion stimuli, SlideSpch: Scrubbed Speech emitted from linearly moving speaker stimuli, SlideNoise: Speech Scrubbed from linearly moving and stationary noise stimuli, SlideMic: Stationary sources scrubbed from a linearly moving mic stimuli
Behavioral
Lead sponsor
Speech Technology and Applied Research Corp.
Industry
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Early Phase 1 Interventional

Noise-augmented Automatic Speech Recognition for Speech Treatment in Parkinson's Disease

NCT06540989
View directory record Official record
Conditions
Parkinson Disease
Interventions
Immediate treatment, Deferred treatment
Behavioral
Lead sponsor
Teachers College, Columbia University
Other
Eligibility
50 Years to 80 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 14, 2024 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Building Sentences With Preschoolers Who Use AAC

NCT03538925
View directory record Official record
Conditions
Down Syndrome, Speech and Language Disorder, Speech Disorders in Children, Speech Intelligibility, Speech Sound Disorder
Interventions
AAC Generative Language Intervention, Standard of Care / Business as Usual
Behavioral
Lead sponsor
University of Central Florida
Other
Eligibility
3 Years to 4 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
2
States / cities
Orlando, Florida • Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Jan 7, 2024 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Not applicable Interventional

Speech Production Enhancement Using Augmentative Communication for Kids

NCT07173049
View directory record Official record
Conditions
Cerebral Palsy (CP), Intelligibility, Speech, Augmentative and Alternative Communication
Interventions
AAC Speech supplementation
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
7 Years to 17 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 31, 2026 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Not applicable Interventional

Listener Training for Improved Intelligibility of People With Parkinson's Disease

NCT06815263
View directory record Official record
Conditions
Dysarthria, Hypokinetic
Interventions
Listener Training
Behavioral
Lead sponsor
Utah State University
Other
Eligibility
18 Years and older
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
2
States / cities
Tallahassee, Florida • Logan, Utah
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Fall Risk Assessment and Speech Intelligibility Enhancement Using In-ear Device

NCT05365646
View directory record Official record
Conditions
Hearing Loss, Dizziness, Vertigo, Fall Related Injury Risk, Fall Prevention, Imbalance, Speech Intelligibility
Interventions
Hearing aids equipped with motion sensing abilities
Device
Lead sponsor
Stanford University
Other
Eligibility
55 Years and older
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Speech Intelligibility in Quiet and Noise for New vs. Legacy Hearing Aids

NCT05101083
View directory record Official record
Conditions
Hearing Loss, Sensorineural, Hearing Loss
Interventions
New Receiver-in-Canal Device, Legacy Receiver-in-Canal Device
Device
Lead sponsor
Starkey Laboratories, Inc
Industry
Eligibility
18 Years to 99 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Eden Prairie, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 17, 2022 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional

A Comparison of the Blom Low Profile Voice Inner Cannula and the Passy-Muir One-Way Tracheotomy Tube Speaking Valve on Voice Production, Speech Intelligibility, and Biomechanical Swallowing Behavior

NCT01784224
View directory record Official record
Conditions
Mechanical Complication of Tracheostomy
Interventions
Blom Low Profile Voice Cannula/Passty-Muir Speaking Valves
Procedure
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 12, 2014 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Speech Perception With High Cognitive Demand

NCT04698356
View directory record Official record
Conditions
Speech Intelligibility, Aging
Interventions
Auditory-cognitive training paradigm
Behavioral
Lead sponsor
University of Maryland, College Park
Other
Eligibility
18 Years to 30 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
College Park, Maryland
Source: ClinicalTrials.gov public record
Updated May 29, 2023 · Synced Jul 22, 2026, 5:49 AM EDT
Completed Not applicable Interventional Results available

Evaluating Benefits of Hearing Aid Microphone Directionality Technologies

NCT04953390
View directory record Official record
Conditions
Hearing Loss
Interventions
Phonak Audeo hearing aid, Phonak hearing aid with multiple directionality settings, adjustable via a mobile app
Device
Lead sponsor
Sonova AG
Industry
Eligibility
18 Years to 90 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Aurora, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 8, 2022 · Synced Jul 22, 2026, 5:49 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Improving Spatial Perception and Speech Understanding in Multitalker Mixtures

NCT05260307
View directory record Official record
Conditions
Hearing Loss
Interventions
hearing aid condition
Other
Lead sponsor
Boston University Charles River Campus
Other
Eligibility
18 Years to 80 Years
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Jul 22, 2026, 5:49 AM EDT