Which device is used to measure noise energy across a range of frequencies?

The octave band analyzer is the correct choice for measuring noise energy across a range of frequencies. This device helps in assessing the sound intensity and quality by breaking down noise into various frequency bands, typically in octaves or one-third octaves. This analysis is crucial for understanding how different frequency components contribute to overall noise exposure and for identifying specific noise sources that may be more prevalent in certain frequency ranges.

In contrast, while a sound level meter measures overall sound pressure levels, it does not provide detailed frequency analysis. The noise dosimeter measures an individual’s exposure to noise over a specific time period, which is valuable for personal exposure assessment but does not analyze the frequency spectrum. A frequency analyzer is related but typically focuses on identifying specific frequency components rather than measuring the overall noise energy across a range of frequencies, which is the primary function of an octave band analyzer. This makes the octave band analyzer essential for comprehensive noise assessment and management in occupational safety and environmental studies.