Clarity in Motion Phase-1 Perceptual Study of Speech Intelligibility
Public ClinicalTrials.gov record NCT07020728. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Speech Intelligibility and Listening Effort
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Participants received a bilateral pure-tone hearing screen administered by the research team. All potential participants who failed the hearing screen were provided with information about its meaning and referral for further audiological testing. Participants who passed the hearing screen and other inclusion criteria were divided into 6 groups, each of which were presented with 144 stimuli equally distributed among processing conditions. Listeners choose a comfortable listening level using supplied headphones and were able to control the rate of presentation. Following a short practice session, listeners were be asked to transcribe each target sentence. The intelligibility of each stimulus was estimated by determining the mean percentage of content words correctly transcribed. After transcription, listeners were asked for two qualitative judgments: (1) the "clarity" of the stimulus, and (2) the "listening effort" involved. The quality of each stimulus was estimated by the median quality judgment, and the effort likewise. Listening sessions were located in a quiet room and presentation was controlled by the Superlab presentation software program. The Stimuli consisted of audio recordings of target spondaic words embedded in a carrier sentence produced by a male and a female native speaker of American English recorded under quiet conditions. Each stimulus presented to the listeners for identification was either unmasked pristine speech or speech that had been processed in one of five ways with different mixtures of noise and sensor movement. The latter are identified as QoS Levels 1-5. Collectively, the estimates of word intelligibility, clarity, and listening effort under the different conditions shed light on the effectiveness with which the tested algorithm preserves listener intelligibility with acceptable effort and quality.
Study identification
- NCT ID
- NCT07020728
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 72 participants
Conditions and interventions
Conditions
Interventions
- Solo: Unmasked Speech Stimuli Behavioral
- Raw: Fully masked speech--no motion stimuli Behavioral
- StatScrub: Extracted Speech--no motion stimuli Behavioral
- SlideSpch: Scrubbed Speech emitted from linearly moving speaker stimuli Behavioral
- SlideNoise: Speech Scrubbed from linearly moving and stationary noise stimuli Behavioral
- SlideMic: Stationary sources scrubbed from a linearly moving mic stimuli Behavioral
Behavioral
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 31, 2024
- Primary completion
- Aug 30, 2024
- Completion
- Aug 30, 2024
- Last update posted
- Jun 24, 2025
2024
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Cincinnati | Cincinnati | Ohio | 45221 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT07020728, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jun 24, 2025 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT07020728 live on ClinicalTrials.gov.