The Susceptibility of Speech to Noise
| Registry | NCT07822802 |
|---|---|
| Status | Enrolling by invitation |
| Phase | Not applicable |
| Study type | Interventional; randomized, parallel, masking: single, basic science |
| Enrollment | 200 (Estimated) |
| Sponsor | Ohio State University (Other); collaborators: National Institute on Deafness and Other Communication Disorders (NIDCD) |
| Conditions | Hearing, Healthy, Speech Perception |
| Interventions | Speech filtering, Speech with background noise (Behavioral) |
| Dates | start 2026-09-30 (estimated), primary completion 2027-08-31 (estimated), completion 2027-08-31 (estimated), first posted 2026-09-16, last updated 2026-09-16 |
| Locations | 1 site in United States |
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All trials for Hearing All trials for Healthy All trials of Speech filtering All trials of Speech with background noise
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:
* Does noise affect speech understanding similarly in all frequency regions?
* Does adding noise cause speech understanding to fall away at a similar rate across frequencies?
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.
| Arm | Type | Interventions | Description |
|---|---|---|---|
| Low-frequency region | Experimental | Behavioral: Speech filtering; Behavioral: Speech with background noise | Speech and noise filtered to the low frequencies |
| Mid-frequency region | Experimental | Behavioral: Speech filtering; Behavioral: Speech with background noise | Speech and noise filtered to the mid frequencies |
| High-frequency region | Experimental | Behavioral: Speech filtering; Behavioral: Speech with background noise | Speech and noise filtered to the high frequencies |
Sex: All, ages: 18 Years to 70 Years, accepts healthy volunteers
Inclusion Criteria: * Age between 18 and 70 years * Native English speakers * No known history of cognitive impairment * No known history of hearing impairment Exclusion Criteria: * Age under 18 or over 70 years * Non-native English speaker * Known history of cognitive impairment * Known history of hearing impairment
| Facility | City | Country | Status |
|---|---|---|---|
| The Ohio State University | Columbus, Ohio | United States |
NIH grants: R21DC022428