Larson Davis 831 Sound Level Meter Overview

The 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.

Please use the navigation below and at left to view:

• 831 Applications
• User Guide and Hints
• Preconfigured Kits
• Optional Accessories
• 831 Operation Manual

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: