Slow and fast meter responses trade averaging for capturing rapid level changes

Evidence

Thus most sound level meters have slow and fast time response settings. The slow time response gives an estimate of the average sound level whereas the fast response tracks more rapid variations in the sound pressure level. — David Howard, Jamie Angus, coustics and Psychoacoustics, 627

Categorization

Category: Definitional Content

Related

• Sound level meters need time averaging to estimate varying pressure levels (similarity 0.85)
• Sound level meters trade average level against tracking speed via time response. (similarity 0.84)
• Sound level meters measure pressure, from which intensity is derived (similarity 0.82)
• Perceived loudness meters must weight frequencies as a compromise across sound levels. (similarity 0.82)
• Loudness meters use frequency weightings as a compromise because ear response varies with level (similarity 0.82)
• Faster reaction times track louder sounds only at moderate to high levels (similarity 0.81)
• No single frequency-weighting can accurately meter loudness at all levels (similarity 0.80)
• Frequency, phase, and impulse responses are mathematically interchangeable descriptions of linear behavior. (similarity 0.80)
• Loudness is measured either by rating magnitude or by matching equal loudness (similarity 0.80)
• Loudness as perception can never be directly measured physiologically (similarity 0.80)
• Loudness is the sensation most directly tied to sound intensity (similarity 0.80)
• Impulsiveness is estimated from level statistics rather than directly measured (similarity 0.80)
• Reported sound levels almost always refer to pressure, matching human hearing (similarity 0.80)
• Two distinct loudness distributions are used in measurement (similarity 0.80)
• Speaker sensitivity gives SPL at one meter per watt of power input. (similarity 0.79)