Accurate workplace noise control to protect hearing health. Professional Measurement of Occupational Noise Exposure
Renting the Simpson Noise Dosimeter is a professional solution for companies that need to measure and evaluate noise exposure in industrial environments, manufacturing plants, machine shops and production areas. This specialized instrument supports industrial hygiene studies to determine the noise level workers are exposed to during their workday and to verify compliance with occupational health and safety regulations.
The Simpson dosimeter is a portable instrument designed to record sound pressure levels over long periods of time. It can be used as a personal dosimeter or as a sound level meter, making it a versatile tool for industrial safety engineers, occupational hygiene specialists and regulatory compliance auditors. The instrument can be worn on the operator’s belt or in a pocket while the microphone is positioned near the ear, accurately recording actual noise exposure during the workday.
From a technical standpoint, it has a sound measurement range of 50 to 100 dB in the low range and 80 to 130 dB in the high range. It integrates an omnidirectional electret condenser microphone with an approximate frequency response of 31.5 Hz to 8 kHz and A-weighting for sound pressure analysis. The instrument offers a resolution of 0.1 dB, an approximate accuracy of ±1 dB and True RMS measurement for reliable results in industrial environments. It can also log data for approximately 31 hours at one-minute logging intervals for later analysis.
The dosimeter works by continuously measuring the sound pressure level and automatically calculating the noise dose accumulated over a given period. The instrument uses parameters such as criterion level, exchange rate and exposure time to determine the percentage of the permitted dose over a standard eight-hour workday. The result is displayed as a percentage of permitted exposure, which makes it easier to identify conditions that may pose a risk to the worker’s hearing health.
In Mexico, this type of measurement is essential for complying with NOM-011-STPS-2001 (Mexican workplace noise exposure standard), which establishes safety and hygiene conditions in workplaces where noise is generated. This standard requires evaluating sound exposure levels and applying controls when levels exceed the permissible limits. Using a professional dosimeter such as the Simpson 897 makes it possible to carry out workplace noise studies and generate technical reports for industrial safety audits.
