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Home > Rental > Larson Davis 831 Sound Level Meter Overview

Larson Davis 831 Sound Level Meter Overview

The Larson Davis 831 Sound Level Meter, the most recent platform from LD, 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
  • G3 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