Hearing Protection Device Use, Noise-exposed Hospital Personnel, Noise-Induced Hearing Loss
Conditions
Keywords
Ear Plugs, Noise-induced Hearing loss, Video-Based Instruction, Paper-Based Instruction, Instruction Method, Hearing Protection Device
Brief summary
The goal of this clinical trial is to learn whether video-based training or paper-based training is more effective at teaching correct earplug insertion technique, in hospital personnel at Maharaj Nakorn Chiang Mai Hospital who work in noise-exposed areas (e.g. laundry and kitchen units), aged 20-60 years. The main questions it aims to answer are: 1. Which training method ,between video-based and paper-based instruction, produces better earplug insertion skill immediately after training? 2. Is any improvement in earplug insertion skill sustained at 1-week follow-up? Researchers will compare a video-based instruction group to a paper-based instruction group to see if one training format leads to better and more lasting earplug insertion skill, as measured by a standardized 20-point observational checklist. Participants will: * Undergo a baseline history and ear exam (otoscopy) and complete a demographic questionnaire . * Have their baseline earplug insertion skill assessed by a blinded observer Be randomly assigned to receive either a 5-minute video-based or paper-based instruction on proper earplug use . * Practice inserting earplugs and then be reassessed immediately after training * Return after 1 week for a follow-up assessment to test retention of the skill
Interventions
BEHAVIORALVideo-Based Earplug Instruction
A 3-minute narrated video demonstrating proper earplug insertion technique, covering hand hygiene, checking earplugs, proper rolling technique, ear canal opening, insertion method, adjustment, and verification of fit. Content is standardized and validated by content experts.
BEHAVIORALPaper-Based Earplug Instruction
An illustrated step-by-step infographic with brief written instructions covering identical content to the video-based module (hand hygiene, earplug preparation, insertion technique, and fit verification), reviewed and validated by content experts.
Sponsors
Sirinthorn Chanaveroj
Chiang Mai University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
SINGLE (Outcomes Assessor)
Masking description
Outcome assessors administering the skill assessment checklist and the data analysts are blinded to group allocation. Due to the nature of the intervention, participants themselves cannot be blinded to which training format (video vs. paper) they receive.
Intervention model description
This is a parallel-group, randomized controlled trial. Eligible participants are randomly assigned in a 1:1 ratio to receive either video-based or paper-based instruction on proper earplug insertion technique, using computer-generated randomization (block size of 4) with allocation concealment via sealed opaque envelopes. Both instructional formats deliver identical educational content, differing only in mode of delivery. Each participant receives only one type of instruction (no crossover), and outcome assessors and data analysts are blinded to group allocation.
Eligibility
Sex/Gender
ALL
Age
20 Years to 60 Years
Healthy volunteers
Yes
Inclusion criteria
* Personnel aged 20-60 years old who report regular works in areas perceived as noisy department * Personnel who works at Maharaj Nakorn Chiang Mai Hospital, Faculty of Medicine, Chiang Mai University, during the year 2026. * Personel who is willing and able to participate in the study throughout its duration.
Exclusion criteria
* Individuals with active ear infections. * Individuals with ear canal stenosis that limit to insert the earplug. * Individuals with visual or auditory impairment that limit to read or see the instruction * Individuals who have limitation to use their hands to insert the ear plug.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The primary outcome is earplug insertion skill, defined as the participant's ability to correctly perform earplug insertion ,using the Standardized Foam Earplug Insertion Checklist (SFEIC) . | before the instruction , Immediately after the instruction and at 1 weeks post-intervention | The primary outcome is earplug insertion skill, defined as the participant's ability to correctly perform earplug insertion. Skill will be assessed using the Standardized Foam Earplug Insertion Checklist (SFEIC) , a standardized 20-point observational checklist (10 points per ear), covering key steps such as hand hygiene, earplug preparation, insertion technique, and fit verification. Each item is scored as correct (1 point) or incorrect (0 points), for a total score ranging from 0 (minimum) to 20 (maximum). Higher scores indicate better (more correct) earplug insertion technique. Participants will be asked to demonstrate earplug insertion, and performance will be evaluated by trained assessors blinded to group allocation. |
Countries
Thailand
Contacts
PRINCIPAL_INVESTIGATORsirinthorn chanaveroj
Department of Otolaryngology , Faculty of medicine Chiang Mai university
Outcome results
None listed