The Quest 2900 is an advanced sound level meter which performs a wide variety of acoustical measurements. Both exponential averaged and time integrated measurements may be made, with the capability of either internal or external data logging. The output of an independently weighted peak detector may also be displayed or logged. Applications include laboratory, industrial, community and audiometric measurement and analysis. The user ultimately controls what is logged, displayed, and printed; select from SPL, LAVG, TWA, max, min, LDN, CNEL, Pa2Hrs, SEL, exceedance levels and time information. Manual, automatic, or threshold-triggered studies provide the user with versatile control. The 2900 provide fast, slow, peak and impulse response with A, C, or linear weighting.