A Multilevel Intervention to Prevent Noise Exposure in Farmworkers

Part of paid clinical trials in San Diego, California.

Sponsor
San Diego State University
Study ID
NCT07554378
Status
Not Yet Recruiting

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Conditions

  • Hearing Loss, Noise-Induced
  • Noise Exposure
  • Occupational Exposure

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Accepted

Interventions

  • Multilevel Hearing Protection Training — BEHAVIORAL
    The intervention is a multilevel behavioral training program designed to reduce occupational noise exposure and promote hearing protection use. Farmworkers participate in a session that includes a brief educational video on noise exposure and hearing loss, group discussion, and hands-on instruction on proper use of hearing protection (e.g., earplugs). Supervisors receive a brief training on identifying noise hazards and supporting hearing protection use among workers. The intervention is intended to be delivered in a group or 1:1 setting by trained research staff or community health workers.

Study Details

This study will test a program to reduce noise exposure and prevent hearing loss among farmworkers. Farmworkers are often exposed to high levels of noise from machinery, which can lead to hearing loss over time. Farms will be randomly assigned to either receive the program or serve as a comparison group. The program includes a short educational video, group discussion, and hands-on training on how to use hearing protection (such as earplugs). Supervisors will also receive brief training on how to support hearing protection use in the workplace. Participants will wear a small device (dosimeter) during a work shift to measure noise exposure before the program and again about one month later. Participants will also complete surveys about their knowledge, attitudes, and behaviors related to hearing protection. A subset of participants will be invited to take part in interviews to understand barriers and facilitators to using hearing protection and implementing the program. The results of this study will help inform future efforts to improve hearing health and reduce noise exposure in agricultural settings.

Key Dates

Start date
Oct 31, 2026
Status verified
Apr 2026
Primary completion
Jan 31, 2031
Completion
Jul 31, 2032

Study Design

Enrollment
200 participants (estimated)
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION

Arms

  • Experimental: Intervention Arm (Multilevel Intervention Group)
    Participants at farms assigned to the intervention arm will receive a multilevel intervention that includes a brief educational video on noise exposure and hearing loss, group discussion, and hands-on training on proper use of hearing protection (e.g., earplugs). Supervisors will receive a brief training on identifying noise hazards and supporting hearing protection use among workers. The intervention is delivered in a community or workplace setting by trained study staff or community health workers.
  • No Intervention: Control Arm (Usual Practice)
    Participants at farms assigned to the control arm will not receive the intervention during the study period. They will complete study assessments, including dosimetry and surveys. The intervention will be offered after study completion.

Primary Outcome Measure

Change in Time-Weighted Average Noise Exposure (dBA) [ Time Frame: Baseline and approximately 1 month post-intervention ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
San Diego State UniversitySan DiegoCalifornia92182
Laura Coco, PhD, AuD
[email protected]
619-594-3151

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By research site
San Diego State University· San Diego, CA

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