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Understanding Speech Perception in Healthy and Impaired Hearing

This study is looking at how people with healthy hearing and those with hearing loss understand speech, especially how nearby sounds (acoustic context) affect what they hear. Researchers will use a method called Speech Manipulation, where they change speech sounds in different ways, like making them sound like "sh" changing to "s" or altering their speed. The main goal is to see how these changes affect your ability to correctly identify speech sounds. You might be able to join if you are between 18 and 65 years old, can recognize spoken English words, and are a competent speaker of North American English. The study aims to enroll 680 participants. The current recruitment status is unclear.

Study design
This is an interventional study with a planned enrollment of 680 participants. It is not specified if it is randomized or blinded.
What's involved
You will listen to speech at a comfortable volume and respond by indicating what you heard, either by speaking or choosing options on a computer. You will be seated in a sound booth and can work at your own pace, with breaks offered between 10-15 minute testing blocks.
Compensation
Not stated in the trial record.
Follow-up
Speech categorization will be evaluated during the main part of the testing, with outcomes assessed and data reported through study completion, an average of 1 year.

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NCT06465979

Perception of Speech in Context by Listeners With Healthy and Impaired Hearing

Recruiting
NAAges 18–65InterventionalBasic science
Marquette University
~680 participants
Updated 2026-06-03 on ClinicalTrials.gov
What's tested:Speech Manipulation

At a glance

Recruiting sites
2 of 2 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Speech categorization
Measured over "Post-treatment" where "treatment" is the systematic manipulation of speech sounds. Speech categorization will be evaluated during the main part of the testing. Outcomes will be assessed and data reported through study completion, an average of 1 year

Conditions

Hearing
Hearing Loss

Explore related trials

Hearing Loss

Where it's being run

2 sites across 2 states
Minnesota1
Wisconsin1

Study leadership

  • Christian Stilp, PhD · PRINCIPAL_INVESTIGATOR · Marquette University

Who to contact

Christian Stilp, PhD
[email protected]
4142881455
Email the study team

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Eligibility criteria

Inclusion

Be able to recognize spoken words in English
Be a competent speaker of north American English
Be an adult between the age of 18 to 65 years
Have normal audiometric thresholds below 25 decibels hearing loss (dB HL) at frequencies between 250 and 8000 Hz OR have audiometric thresholds not exceeding 40 dB HL at frequencies between 250 and 8000 Hz OR have audiometric thresholds not exceeding 55 dB HL at frequencies between 250 and 8000 Hz OR use a cochlear implant
Lack language-learning or other cognitive disabilities

Exclusion

Inability to recognize spoken words in English
Not a competent speaker of north American English
Be younger than 18 years of age
Be older than 65 years of age
Have normal audiometric thresholds exceeding 25 dB HL at frequencies between 250 and 8000 Hz OR have audiometric thresholds exceeding 40 dB HL at frequencies between 250 and 8000 Hz OR have audiometric thresholds exceeding 55 dB HL at frequencies between 250 and 8000 Hz
Language-learning or other cognitive disabilities

What this trial measures

  • Speech categorization"Post-treatment" where "treatment" is the systematic manipulation of speech sounds. Speech categorization will be evaluated during the main part of the testing. Outcomes will be assessed and data reported through study completion, an average of 1 year

    The participant sits inside a double-walled sound booth. They are seated at a table that contains a computer monitor and a mouse. A single utterance is played over headphones or through a loudspeaker directly in front, and the participant indicates what they thought the utterance was by selecting among various options on the screen using the mouse. During a single block of trials there are between 60 and 160 sounds, depending on the exact experiment. Ordering of stimuli within the block is randomized. That testing block may be repeated multiple times so that the proportion of responses for each sound-response pair can be estimated reliably and precisely. Completion and advancement of trials is at the participant's own pace. Each testing block takes between 4 and 15 minutes.