Listening Volume Adjustment in Bone and Air Conduction Headphones
NCT07932964, Not applicable, Recruiting, Second Affiliated Hospital, Zhejiang University, School of Medicine
Trial 10
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
| Field | Value | Source |
|---|---|---|
| Title | Listening Volume Adjustment in Bone and Air Conduction Headphones | ClinicalTrials.gov |
| NCT number | NCT07932964 | ClinicalTrials.gov |
| Status | Recruiting | ClinicalTrials.gov |
| Phases | Not applicable | ClinicalTrials.gov |
| Enrollment | 32 participants, estimated | ClinicalTrials.gov |
| Lead sponsor | Second Affiliated Hospital, Zhejiang University, School of Medicine | ClinicalTrials.gov |
| Conditions | Noise Exposure, Preferred Loudness Level, Normal Hearing | ClinicalTrials.gov |
| Interventions | In-ear Air Conduction Headphones, Open-ear Bone Conduction Headphones, Bone Conduction Headphones with Ear Occlusion | ClinicalTrials.gov |
| First posted | 2026-11-12 | ClinicalTrials.gov |
| Last updated | 2026-11-12 | ClinicalTrials.gov |
Registered outcomes 9
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description | Source |
|---|---|---|---|---|
| Primary | Change in Self-Adjusted Listening Volume From Quiet to 60 dB(A) Background Noise Levels | During the study visit (approximately 1-2 hours). | The change in final self-adjusted music volume from the quiet condition to the 60 dB(A) background noise condition will be calculated separately for each headphone condition (in-ear air conduction headphones \[AC\] and open-ear bone conduction headphones \[BC\]). The change will be calculated as the final volume at 60 dB(A) minus the final volume in the quiet condition. The differences in volume change among the two headphone conditions will be compared. | ClinicalTrials.gov |
| Secondary | Change in Self-Adjusted Listening Volume From Quiet to 30, 40, and 50 dB(A) Background Noise Levels | During the study visit (approximately 1-2 hours). | The change in final self-adjusted music volume from the quiet condition to each background noise level (30, 40, and 50 dB(A)) will be calculated separately for in-ear air conduction headphones (AC) and open-ear bone conduction headphones (BC). The change will be calculated as the final volume at each noise level minus the final volume in the quiet condition. The volume changes between the two headphone conditions will be compared at each noise level. | ClinicalTrials.gov |
| Secondary | Final Self-Adjusted Listening Volume at Different Background Noise Levels | During the study visit (approximately 1-2 hours). | The final self-adjusted music volume at quiet condition, 30, 40, 50, and 60 dB(A) background noise levels will be recorded and compared between AC and BC headphones. | ClinicalTrials.gov |
| Secondary | Number of Volume Adjustments | During the study visit (approximately 1-2 hours). | The total number of individual volume adjustments made by each participant during each test will be recorded and compared between AC and BC headphones under different background noise conditions. | ClinicalTrials.gov |
| Secondary | Total Time Required for Volume Adjustment | During the study visit (approximately 1-2 hours). | The total time from the beginning of volume adjustment to reaching the final self-adjusted listening volume will be recorded and compared between AC and BC headphones under different background noise conditions. | ClinicalTrials.gov |
| Secondary | Cumulative Magnitude of Volume Adjustments | During the study visit (approximately 1-2 hours). | The cumulative magnitude of volume adjustments during each test will be calculated as the sum of the absolute values of all individual volume changes, regardless of the direction of adjustment, and compared between AC and BC headphones under different background noise conditions. | ClinicalTrials.gov |
| Secondary | Subjective Perception of Vibration During Bone Conduction Headphone Use | During the study visit (approximately 1-2 hours). | Participants will be asked whether they perceive vibration while using bone conduction headphones at their final selected listening volume. The presence or absence of perceived vibration will be recorded under different background noise conditions. | ClinicalTrials.gov |
| Other | Change in Self-Adjusted Listening Volume With Ear Occlusion During Bone Conduction Listening | During the study visit (approximately 1-2 hours). | The change in final self-adjusted music volume from the quiet condition to each background noise condition (30, 40, 50, and 60 dB(A)) will be calculated when participants use bone conduction headphones with bilateral ear occlusion (BC+Occlusion). The results will be compared with those obtained using bone conduction headphones without ear occlusion (BC) to evaluate the effect of ear occlusion on noise-induced volume adjustment. | ClinicalTrials.gov |
| Other | Final Self-Adjusted Listening Volume With Ear Occlusion During Bone Conduction Listening | Time Frame: During the study visit (approximately 1-2 hours). | The final self-adjusted music volume under quiet and background noise conditions (30, 40, 50, and 60 dB(A)) will be recorded during bone conduction headphone use with bilateral ear occlusion (BC+Occlusion) and compared with the corresponding BC condition without ear occlusion. | ClinicalTrials.gov |
Outcomes 0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
| Type | Outcome | Time frame | Population | Units | Measured as | Source |
|---|
Results by group 0
Each measurement the trial posted, group by group, in the words and numbers it posted.
| Outcome | Group | Category | Value | Spread | Units | Source |
|---|
Participant flow 0
How many started, completed or left each group, period by period.
| Period | Milestone | Group | Participants | Units counted | Source |
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Adverse events 0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
| Type | Event | Organ system | Group | Affected | At risk | Events | Source |
|---|
Adverse event totals 0
The totals the trial posted for each group.
| Total | Group | Affected | At risk | Source |
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Papers 0
The papers the trial lists on ClinicalTrials.gov.
| PMID | Listed as | Source |
|---|
Grants 0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
| Project | Title | Principal investigators | Organization | Funder | Fiscal years | Source |
|---|
Trial comparisons 0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
| Comparison | Source |
|---|
Tests 0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
| Test | Named as | Source |
|---|
Source 5
| Field | Value | Source |
|---|---|---|
| Release | trials-2026-11-12-0.4.0 | ClinicalTrials.gov |
| Release manifest SHA-256 | 0f4a8d8c48aee2a7573ae0fa94ecbeab70c1adbe449bbc95c424bc7d3e97b9d4 | ClinicalTrials.gov |
| Registry capture | 2026-11-12 | ClinicalTrials.gov |
| Results copy, AACT | 2026-03-23 | ClinicalTrials.gov |
| NIH clinical studies file | 2026-11-13 | ClinicalTrials.gov |
Release trials-2026-11-12-0.4.0
ClinicalTrials.gov's posted results, through CTTI's AACT: ClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299 ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
ClinicalTrials.gov: none stated ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
NIH RePORTER's clinical studies and project files: Public domain (NIH RePORTER)