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Comprehensive and Detailed Explanation:

The correct answer is B, Dosimeter.

A noise dosimeter measures an employee's cumulative exposure to noise throughout a work shift. The device is typically worn by the worker and records sound levels over time, allowing safety professionals to determine whether exposures exceed occupational limits.

Excessive noise can cause permanent hearing loss, communication difficulties, reduced productivity, and increased accident risk. Occupational hearing conservation programs often include noise monitoring, engineering controls, administrative controls, audiometric testing, employee training, and hearing protection.

OHST practitioners may assist with exposure assessments and interpretation of monitoring results. Accurate noise measurements help organizations identify high-risk areas and implement appropriate controls. Engineering controls such as equipment enclosures, vibration reduction, and quieter machinery are often preferred over relying solely on hearing protection devices.

Industrial hygiene focuses on anticipating, recognizing, evaluating, and controlling workplace health hazards. Noise exposure assessment is a fundamental component of occupational health programs and helps protect employees from preventable hearing damage.