What sound measurements can an SLM perform?

Sound Level Meters (SLMs) are versatile instruments that can measure sound levels in various weighting scales, which represent how the human ear perceives sound at different frequencies. The correct answer indicates that an SLM can perform measurements in dBA, dBC, and dB using linear (or flat or Z) weighting.

• dBA (A-weighted) is the most common scale used in noise measurement and is designed to reflect the sensitivity of human hearing by reducing the impact of low and very high frequencies, making it more applicable for assessing potential hearing damage in workplace environments.

• dBC (C-weighted) is used for measurements where low-frequency sounds are of interest, as it gives equal weight to all frequencies, which is useful for understanding the impact of sound regardless of its frequency makeup.

• dB (lin or flat or Z) represents unweighted sound levels and is essential when the complete sound spectrum is of interest, allowing for a comprehensive analysis of sound levels without frequency discrimination.

Thus, this flexibility allows for a range of applications in occupational hygiene, ensuring accurate assessment and management of noise exposure in various settings.