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System 824

System 824
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Sound Level Meter and Real-time Analyzer Advanced Sound Level Measurements – Real-time 1/1, 1/3 Octave Building Acoustics Measurements Real-time FFT Analysis Environmental Noise Monitoring – Transient Event Measurements Audiometer Calibration The Larson Davis System 824 combines advanced sound level meter and real-time analyzer capabilities into a rugged, user-friendly, ergonomic package. The base unit is an Integrating Sound Level Meter (ISM) that meets Type 1 Standards and offers simultaneous measurement of sound pressure levels using fast, slow, and impulse detectors, for A, C, and flat frequency weightings. This feature, termed ANY LEVEL™ measures 48 sound pressure parameters at once with a linear, 105 dB range. With firmware enhancements, the base unit expands as needed to accommodate multiple data processing requirements, including: • Sound Spectrum Analyzer (SSA) with ANY LEVEL™ simultaneous sound pressure level measurement, real-time 1/3 octave frequency analysis, spectral Lns and multiple time histories. This is your “do everything at once” instrument. • Real-time Frequency Analyzer (RTA) provides rapid storage of 1/3 octave spectra at rates to 400/second, advanced trigger functions and automated determination of reverberation time. • Fast Fourier Transform Analyzer (FFT) with 400-line resolution from 1 Hz to 20 kHz for specific frequency investigations. Includes snapshot data storage, THD calculations, user definable linear units, and more. • Logging Sound Level Meter (LOG) provides advanced time and data logging features, including automatic logging of data associated user-defined noise events. As with all Larson Davis products, this equipment is complemented with toll free applications assistance, 24-hour customer service, and is backed by a no-risk policy that guarantees satisfaction or your money refunded.

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High Speed Real-time Frequency Analysis (RTA) 1/3 octave spectra at rates up sound level or, for room - acoustics, based on impulse excitation or decay of broadband sound in a room. Automatically capture and average decay spectra for multiple measurement sequences. Use with DNA software to calculate RT-60 using Schroeder backwards integration and to determine building acoustics parameters such as transmission loss and impact isolation according to ISO and ASTM standards. Easily determine speech interference level (SIL) and RC, NCB and HTL room criteria as defined by ANSI SI2.2-1995 from...

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Charge-output Accelerometers FF 1/2" Free-field Pre-polarized mic. RI 1/2" Random-incidence Prepolarized mic. Your choice of precision, externally-polarized, 1/2" mics: 2541 Free-field. FE Free-field. RE Random-incidence. FEL Free-field, low sensitivity. REL Random-incidence, low sensitivity. 824 Utility DNA Data, Navigation & Software Analysis Software Serial Printer Serial CBL042 AC/DC Output Cable BAT010 Internal Rechargeable Battery Pack * Use in combination with EXCXXX cable NOTE: Items in blue type are included accessories The 824 is available in the following configurations: Model...

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System 824 Features and Specifications General Standards Compliance Time weighting: Slow, Fast, Impulse, TWA, peak (in parallel with all frequency weightings) A, C, Flat (in parallel with all time weightings) >105 dBA (ISM & LOG), >80 dB (SSA) <16 dBA (2541 microphone), typical 157 dBA (2540 microphone), typical >65 dB 160 dB (2540 microphone) 1/3 octave: 12.5 Hz to 20 kHz 1/1 octave: 16.0 Hz to 16 Hz 1 Hz to 20 kHz Frequency weighting: Linearity range: RMS noise floor: RMS overload level: Peak range: Peak level: Octave band frequencies: 400-line FFT: Measurements SPL: Lmin: Lmax: Lpeak:...

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