Occupational Noise Control Engineering Study

Who it’s for

Companies that need to protect their workers’ hearing health and comply with current occupational hygiene regulations.

Applicable regulations

D.S. No. 594/99 MINSAL (Regulation on Basic Sanitary and Environmental Conditions in the Workplace); Occupational Noise Exposure Protocol (PREXOR) from the Ministry of Health / Institute of Public Health, which governs workers’ hearing health surveillance programs.

Scope / methodology

Dosimetry and noise measurements by workstation; exposure dose calculation; identification of critical workstations; design of technical, administrative, and personal hearing protection control measures.

Deliverables

PREXOR-compliant assessment report and support implementing the corresponding surveillance program.

How we can help

Tell us your industry and the approximate number of workstations to assess so we can scope the study.

Frequently asked questions

What is dosimetry and why is it necessary?
It’s a measurement of a worker’s noise exposure over their shift, using a portable device (dosimeter). It allows us to calculate the daily exposure dose and compare it against the limits set by D.S. No. 594/99 and/or PREXOR.

What is PREXOR and who must comply with it?
It’s the Occupational Noise Exposure Protocol (PREXOR) from the Ministry of Health / ISP, which requires hearing health surveillance for workers exposed above certain levels; it applies to companies in any industry with noisy workstations.

What happens if a workstation exceeds the permitted limit?
We design hierarchical control measures: first technical (enclosures, silencers), then administrative (rotation, exposure time limits), and finally personal hearing protection.

How many workers do I need to assess?
It depends on the number of distinct workstations, not the total number of workers — several workers can share the same exposure profile.

Delivery time

4 to 8 weeks, depending on the number of workstations to be assessed.