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NCT Number: NCT07806123

OCCUPATIONAL NOISE AND CHEMICAL EXPOSURE EFFECTS ON AUDITORY AND VESTIBULAR FUNCTION

This study aims to investigate the effects of occupational noise exposure on hearing and auditory functions among individuals working in noisy environments. The study evaluates the relationship between occupational noise exposure and hearing-related outcomes.

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Key information

Conditions

Occupational Noise Exposure Chemically-Induced Disorders Drug-Related Side Effects and Adverse Reactions Ear Diseases Hearing Disorders Hearing Loss Hearing Loss, Noise-Induced Hearing Loss, Sensorineural Nervous System Diseases Neurologic Manifestations Otorhinolaryngologic Diseases Ototoxicity Pathologic Processes Pathological Conditions, Signs and Symptoms Radiation Injuries Sensation Disorders Signs and Symptoms Wounds and Injuries

Age range

20 year–60 year

Sex eligibility

Male

Study type

Observational

Primary location

Ondokuz Mayıs University

Samsun, 55139, Turkey (Türkiye)

Location contact

Handan TURAN DİZDAR, PhD

SUB_INVESTIGATOR

Ondokuz Mayıs University

CONTACT

[email protected]

+90 362 312 19 19

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male participants aged 20-60 years who had been working at a fuel station for at least two years, had no hearing loss on their pre-employment audiogram, and had no history of balance loss or otologic surgery.

Exclusion criteria

  • Individuals with middle ear pathology, a history of hearing loss, vestibular disease, or neurological or psychiatric disorders.

Treatment and study plan

Primary outcomes

  1. Pure-Tone Audiometry Hearing Thresholds

    Time frame: Baseline

    Hearing thresholds were assessed by pure-tone audiometry at 250, 500, 1000, 2000, and 4000 Hz in both ears and compared between the study and control groups.

Secondary outcomes

  1. Acoustic Reflex Thresholds

    Time frame: Baseline

    Ipsilateral and contralateral acoustic reflex thresholds were assessed at 500, 1000, 2000, and 4000 Hz and compared between the study and control groups.

Study contacts

Contact information is provided by the study sponsor or research team.

Handan TURAN DİZDAR, PhD

CONTACT

[email protected]

+90 505 597 06 27

Işılay Kaplan, Audiologist

CONTACT

[email protected]

+90 555 897 03 66

Sponsors and collaborators

Lead sponsor

Ondokuz Mayıs University

Other

Registry information

Official study title

EFFECTS OF OCCUPATIONAL NOISE AND CHEMICAL EXPOSURE ON AUDITORY AND VESTIBULAR FUNCTION IN FUEL STATION EMPLOYEES

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Sep 8, 2026
Registry last updated
Sep 8, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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