Unattended Outdoor Environmental Noise Monitoring System

SoundExpert Noise Monitoring Kit | Model NMS048

Need a Noise Monitoring System that you can deploy outdoors for a few hours or a few weeks or more? Larson Davis SoundExpert™ Noise Monitoring System can be powered via battery, solar, or line power, making it easy to deploy nearly anywhere, then retrieved to collect and analyze data.


  • Complete noise measuring system
  • Ideal to deploy, measure, download, then analyze
  • Flexible powering options
  • Up to 2 weeks of continuous battery powered operation
  • Weatherproof, lightweight, compact case
  • Includes SoundExpert Sound Level Meter Model 821ENV-D


  • Mining Operations Noise
  • Construction Site Noise
  • Wind Turbine Noise
  • Motorsports Noise
  • Unattended Noise Monitoring

Noise Monitoring Anywhere

System Capabilities include:

  • Data Logging
  • Community Noise Metrics
  • 8 GB Data Storage (Expandable to 256 GB)
  • 1/1 and 1/3 Octave Filters

Included G4 LD Utility software streamlines project management, measurement setup, data visualization and analysis, and results reporting. Data can be downloaded, visualized, manipulated, and exported to a variety of formats including Microsoft Excel® .xlsx.

Key Specifications for SoundExpert Model NMS048

Dynamic Range (A-weighted typical)14 to 140 dB
Time WeightingsFast, Slow, & Impulse
Frequency WeightingsA, C, & Z
Data Storage (micro SD card)8 GB standard
Up to 256 GB
Data LoggingTime history: 100 ms to 1 h
Measurement History: 1 min to 6 h
MetricsLeq, Lmax, Lmin, Lpeak, Ln (6 values), LDN, LDEN

System Configurations

Included Standard
SoundExpert Sound Level Meter with USB-C CableModel 821ENV-D
MicrophoneModel 377B02
PreamplifierModel PRM821
Outdoor Microphone ProtectionModel EPS2116
USB Power Supply Model PSA045
Weatherproof CaseModel EPS048
Configurations Also Available
Base ModelNMS048-SLA
Base Model with Solar PanelNMS048-SLA-S
Base Model with US / North American Power KitNMS048-SLA-ACU
Base Model with European Power KitNMS048-SLA-ACE
See Configuration Guide for More Information


Standards and Approvals for SoundExpert Model NMS048

AcousticANSI S1.4-2014 Class 1
IEC 61672-1:2013 Class 1
IEC 61260
SafetyDirective 2014/35/EU
IEC 61010-1:2010
RoHS Directive 2011/65/EU
ApprovalsCE, RoHS, WEEE


Preliminary - specifications subject to change