Larson Davis 831 Sound Level Meter OverviewThe Larson Davis 831 Sound Level Meter provides a powerful, single channel system for a wide variety of tasks, including Environmental Noise, Workplace Noise Safety, Architectural Acoustics and Product Noise Studies.
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Key 831 Hardware Features Include:
- 2GB Internal memory standard
- 120dB Dynamic Range (20 - 140dB in standard range)
- Simultaneous A, C and Z Frequency Weighting
- Slow, Fast and Impulse Detection
- Over 50 acoustic parameters available to log simultaneously
- Microphone extension cabling supported to 30m/100ft
- Backlit "Quiet Touch" keypad
- Backlit LCD display with full navigation, even while collecting data
- Easy, one-handed operation
- Over 16 hours of operation using 4 AA batteries
- Versatile options include built in digital correction between freefield and random incidence mics
- Works with any standard 0V prepolarized condenser microphone
- USB 2.0 connections including auxiliary port for GPS, USB storage, modem and more
Useability:
- User selectable multi-parameter Data Logging (as fast as 20ms)
- Measurement History allows longer term parameters to be stored simultaneously with Data Logging (e.g., Ln and histogram tables)
- Exceedance History with programmable length and triggers
- Built-in signal generator for room acoustics testing
- Multiple setup configurations can be stored on each meter
- Outdoor kits and options available for unattended monitoring
- G4 Software allows for easy meter setup and data download
- Real Time 1/1 & 1/3 Octave Frequency Analysis (*)
- Advanced .wav sound recording for sound identification or post-processing (*)
- Dynamic Triggering triggers .wav recording based on varying background level (*)
- FFT real time analysis, to 1600 lines (*)
- Accelerometer connectivity/ICP® power for vibration measurements (*)
(*) Indicates an available option
Onboard Storage Capabilities Offer:
- 100 million point Leq Time History (0.1 dB resolution)
- 30 million 1/1 octave spectra
- 12 million 1/3 octave spectra
- 2 million full parameter Time Histories (over 40 sound metrics plus 1/1 and 1/3 Leq, SPL, min and max)
- 400,000 Standard Measurement Histories (including 1/1, 1/3 octave Leq, max, min, and Ln tables)
- 330,000 Full Measurement Histories (includes standard plus weather, GPS data, and Spectral Ln tables)
Standards Met:
ANSI |
S1.4-1983 (R 2006) plus Amendment S1.4A-1985 (R 2006) Type 1
S1.43-1997 (R 2007) Type 1
S1.11-2004 Class 1
S1.25-1991 Class 0 |
ASTM |
E2235 (2004) Standard Test Method for Determination of Decay Rates for Use in Sound Insulation Test Methods |
IEC |
61672-1 Ed. 1.0 (2002-05) Class 1, Group X 60651 Ed 1.2 (2001) plus Amendment 1 (1993-02) and Amendment 2 (2000-10) Type 1, Group X
60804 (2000-10) Type 1, Group X
61010-1 Ed. 2.0 (2001-02)
61260 Ed. 1.0 (1995-08) plus Amendment 1 (2001-09), 1/1 and 1/3-octave Bands, Class 0
61252 Ed. 1.1 (2002-03) Type 1 Group X, all filters |
ISO |
3382-1:2006 Measurement of Room Acoustic Parameters Part 1: Performance Rooms
3382-2:2008 Measurement of Room Acoustic Parameters Part 2: Reverberation Time in Ordinary Rooms |
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