Leq integrates squared pressure over time to estimate noise exposure

Evidence

This measure integrates the instantaneous squared pressure over some time interval, such as 15 min or 8 h, and then takes the square root of the result. This provides an estimate of the root mean square level of the signal over the time period of the measurement and so gives the equivalent sound level for the time period. That is, the output of the Leq measurement is the constant sound pressure level, which is equivalent to the varying sound level over the measurement period. The Leq measurement also provides a means of estimating the total energy in the signal by squaring its output. A series of Leq measurements over short times can also be easily combined to provide a longer time Leq measurement by simply squaring the individual results, adding them together, and then taking the square root of the result, as shown in Equation 2.7. — David Howard, Jamie Angus, coustics and Psychoacoustics, 629 (#expands, via linked claim)

Categorization

• XREF: connects to: Leq integrates squared pressure over time to yield an equivalent constant sound level — David Howard, Jamie Angus, coustics and Psychoacoustics, 629; Noise damage accumulates as an integrated dose where loudness trades against duration; Hearing integrates sound intensity over a fixed 200 ms window (+1 more)

Related

• Leq reduces varying noise to an equivalent constant sound level (similarity 0.96)
• Leq measurement integrates squared pressure to yield an equivalent constant level (similarity 0.94)
• Leq integrates squared pressure over time to yield an equivalent constant sound level (similarity 0.94)
• Sound level meters need time averaging to estimate varying pressure levels (similarity 0.87)
• Measuring noise exposure over time requires Leq, not standard meter settings (similarity 0.86)
• Leq measurements assess cumulative noise exposure linked to hearing loss (similarity 0.85)
• Noise exposure is measured as an integrated dose, trading level against duration (similarity 0.83)
• Noise exposure permits trading louder sounds for shorter duration within a fixed dose (similarity 0.82)
• Noise damage accumulates as an integrated dose where loudness trades against duration (similarity 0.80)
• Sound intensity level and sound pressure level are roughly equivalent (similarity 0.80)
• Hearing integrates sound intensity over a fixed 200 ms window (similarity 0.79)
• Sound amplitude is measured as root mean square pressure because ears sense pressure (similarity 0.79)
• Sustained sound beyond about 200 ms adds no further loudness (similarity 0.79)
• Sound level meters measure pressure, from which intensity is derived (similarity 0.79)
• Magnitude estimation of loudness yields only relative, not absolute, values. (similarity 0.78)

Broader Connections

• Leq integrates squared pressure over time to yield an equivalent constant sound level #expands (1.00) — David Howard, Jamie Angus, coustics and Psychoacoustics, 629
• Noise damage accumulates as an integrated dose where loudness trades against duration #expands (0.85)
• Hearing integrates sound intensity over a fixed 200 ms window #qualifies (0.75)