An interventional study of Speech filtering and Speech with background noise in Hearing, Healthy and Speech Perception, sponsored by Ohio State University. Enrolling by invitation at 1 site in United States. Open to participants aged 18 Years to 70 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-09-16.
Sponsored by Ohio State University · Not applicable, Interventional, and Basic science
The goal of this clinical trial is to establish how speech understanding is affected by background noise in people with normal hearing. The main questions it aims to answer are:
Participants will listen to speech in different frequency regions, with noise added at various levels, and respond with the words that they hear.
Participants will be seated comfortably throughout the experiment. Stimuli involving speech mixed with background noise at various levels will be played back from a PC and presented diotically over headphones at a level of approximately 65 dBA in each ear. Subjects will be instructed to repeat back each sentence, guessing if unsure. The experimenter will record component words correctly recalled. Sentences will not be repeated, and only exact-word matches will be accepted. A 10-minute practice stage will precede testing, in which subjects will hear example stimuli and sentences not used for testing. Test duration will not exceed two hours. Multiple groups of listeners will be employed, and the basic experimental protocol for each participant will be identical, differing only with regard to differences in the frequency content of the speech and/or the background noise present. Participants will be randomly assigned to groups.
205 studies on the registry are indexed under Speech; 80 are open to participants now.
This study's planned enrollment of 200 is above the median of 52 across 141 interventional studies indexed under Speech.
Browse Speech studies →Ohio State University is the lead sponsor of 663 studies on the registry; 148 are open to participants now.
Of its 67 completed or terminated interventional studies of FDA-regulated products, 49 (73%) have results posted.
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Exclusion Criteria:
Speech and noise filtered to the low frequencies
Behavioral: Speech filtering · Behavioral: Speech with background noise
Speech and noise filtered to the mid frequencies
Behavioral: Speech filtering · Behavioral: Speech with background noise
Speech and noise filtered to the high frequencies
Behavioral: Speech filtering · Behavioral: Speech with background noise
Speech will be filtered into one of three frequency regions.
Background noise will be added to the speech at different levels.
Percent words correct
The percentage of words correctly heard and reported by the listener
Time frame: During a single listening session lasting not more than 2 hours
Plan to share: Undecided
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