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The goal of the clinical trial study (Phase 0) is to map out the developmental trajectory of functional spatial hearing abilities in reverberant environments for children with normal hearing between the ages of 6 and 18 years, and to understand the inter-relationships between the three perceptual abilities: auditory object size formation, spatial acuity, and spatial unmasking during typical development. Children are asked to perform psychoacoustic tasks when the auditory stimuli are processed to present in virtual acoustic environments (1) with no reverberation and (2) with one of the two levels of reverberation that emulate everyday indoor environments. The intervention of this clinical study is in the random assignment of one of the two reverberant environments. Researchers will compare these children with a group of normal-hearing adults to anchor matured performances.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Low-Reverberation | Experimental | Participants perform psychoacoustic tasks under a low-reverberant environment and a control environment without reverberation. |
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| High-Reverberation | Experimental | Participants perform psychoacoustic tasks under a high-reverberant environment and a control environment without reverberation. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Low-Reverberation | Other | The exposure to low-reverberation is by presenting auditory stimuli to participants that are digitally processed to contain auditory cues that sound more or less reverberant, e.g., small classroom. |
| Measure | Description | Time Frame |
|---|---|---|
| Auditory Object Size (Apparent Source Width) | Psychoacoustic measure of the smallest detectable change in width of an auditory image in degree angular span in the horizontal plane | Year 1-3 |
| Spatial Acuity (Minimum audible angle) | Psychoacoustic measure of the smallest detectable angular separation between two auditory objects | Year 1-3 |
| Spatial Unmasking (Minimum angular separation) | Psychoacoustic measure of the smallest angular separation to gain a target speech benefit in the presence of distracting speech maskers | Year 1-3 |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Z. Ellen Peng | Father Flanagan's Boys' Home | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Boys Town National Research Hospital | Omaha | Nebraska | 68131 | United States |
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There are two arms in the exposure of reverberation for participants. For children (n1=45) and adults (n1=15) assigned to Arm 1, they receive a non-reverberant environment (control) and a low-reverberant environment (intervention A). For children (n2 = 45) and adults (n2 = 15) assigned to Arm 2, they receive the same non-reverberant environment (control) and a high-reverberant environment (intervention B). Both arms of children and adults enrolled perform the same psychoacoustic tasks for outcome assessments.
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| High-Reverberation | Other | The exposure to high-reverberation is by presenting auditory stimuli to participants that are digitally processed to contain auditory cues that sound more or less reverberant, e.g., large lecture hall/auditorium. |
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