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NMS044 Outdoor Noise Monitoring System

Rent Portable Outdoor Noise Monitoring System Model NMS044

The SoundAdvisor™ Portable Noise Monitoring System Model NMS044 is a completely wireless solution designed to run indefinitely on solar power, allowing you to both take measurements and view them from anywhere or remotely 24 hours a day, seven days a week. The SoundAdvisor noise monitor includes everything needed for a noise monitor (powered by SoundAdvisor Model 831C Class 1 Sound Level Meter).

Remote Access to Noise Data

  • Network Access 24/7- Connect from your smartphone, computer, or mobile device and have direct access with the meter at your remote location. Make updates, receive alerts, change test parameters, check microphone calibration, and download data with ease.
  • Complete Power Solutions- Battery Powered. Available Solar Power options allowing your Noise Monitoring System to run endlessly and sufficiently.
  • Real-Time Alerts- Receive email or texts with data and sound recordings when set noise limits are exceeded.
  • Own Your Data- Control your data without monthly access and maintenance costs.
  • NMS-SE-FF - Noise Monitoring System with SoundExpert LxT Class-1 SLM, 377B02 freefield prepolarized mic, EPS042 enclosure (uses 8 D-Cell batteries), EXC010 cable, EPS2116 outdoor mic protection.
  • NMS-SE-RI - Noise Monitoring Systems - similar to NMS-SE-FF but with 377C20 random incidence mic instead of freefield.

Outdoor Noise Monitoring Applications

NMS044 is suitable for a wide range of outdoor noise monitoring applications, including

  • Construction Noise Monitoring
  • Environmental Noise Studies and Compliance
  • Airport Noise Management
  • Traffic Noise Studies
  • Community Noise Monitoring
  • National Park Noise Monitoring
  • Wind Farm Noise Monitoring
  • And more

Which Microphone Should I Use?

Free Field - Designed to be used when the field of measurement is open and not filled with hard, reflective surfaces (in other words, when the measurement is being taken in an open area). There are two ways of using a free field microphone:

  • Pointed directly at the sound source of interest, for example when getting a sound profile for a piece of equipment or making sound power measurements
  • Placed in the center of all sound sources and pointed 90 degrees away (up) – for example in many environmental studies, National Park studies, traffic studies, or construction noise studies when the surrounding environment is wide open.

Random Incidence - Designed to measure a sound field with multiple sources in multiple directions. Used in reflective areas, random incidence microphones react equally to pressure waves from every direction. Typical applications include

  • Indoor crowd noise
  • Building acoustics (classroom, theater, sanctuary)
  • Sound chambers

Pressure Field - Designed to measure the sound pressure in front of the diaphragm. Pressure microphones typically allow for a greater dynamic range, and have a very flat response across the full frequency spectrum.  The pressure microphones offered by TMS for rent feature low sensitivity that allows the noise monitoring system to measure higher dB levels without overloading.

  • Indoor/outdoor gun ranges, ballistics testing
  • High intensity work sites (e.g. pile-driving)
  • Monitoring very loud machinery or systems
Microphone Description Model Number Response
General Purpose (Traffic, etc.) 377B02 Free Field
High Level (Factory, etc.) 377C10 Pressure Field
Extremely High Level (Ballistics at near range, etc.) 377A12 Pressure Field
Random Incidence to Full Hearing Range 377A21 Random Incidence
Extremely Low Level (National Parks, sanctuaries, etc.) 378A04 Free Field

*Microphone range varies with meter used, preamplifier, etc. Contact our rental team for more details.

Preamplifier Options

Description Model Number
Standard preamplifier PRM831
Designed for use with environmental shroud PRM2103-FF

Sync Sound and Weather Data

Various weather parameters can be collected and synced with other measured data. Parameters that can be measured may include wind speed, gust speed, direction, temperature, humidity, and barometric pressure. The Modal Shop rents these sensors as kits (denoted by the "K" prefix in the model number). Kits include

  • Selected weather sensor (SEN031 or SEN032)
  • Cable to mate weather sensor, batteries, and meter
  • Necessary hardware adaptors for tripods and cabling
Included Included Optional Optional Not Available Not Available
Purpose Model Number Wind (Speed & Direction) Temperature Humidity Barometric Pressure Rain Rate Hail Rate
Multi-parameter KSEN031 Included Included Included Included Included Included
Wind speed and direction  KSEN032 Included Not Available Not Available Not Available Not Available Not Available


Power Sources

All power sources listed below included in rental of NMS044 system.

Power Source Model Number Description
Solar Power SLP002 Portable folding 100 Watt solar panel with integrated stand and carrying case
Line Power PSA039 AC power supply
Battery BAT020 35 Ah SLA battery


Tripod Options

Purpose Model Number
Monopod (Built-in to system)*
Light-duty, short-term use for attended measurements TRP001
Heavy-duty, unattended tripod TRP003

* When using NMS044 with weather station, additional tripod is required.


Optional Cellular Data Plans for Outdoor Noise Monitoring Systems

Select 831C-SIM option for 4G Wireless AT&T SIM card and data plan with static IP address. Roaming and overage charges may apply (10GB data plan included). 


Standard NMS044 Noise Monitoring System Includes

Model Number Description
SoundAdvisor 831C Sound Level Meter, Class 1
831C-LOG Data logging firmware option. Logging of time histories with interval from 20 ms to 24 hours
831C-ELA Event processing option. Exceedance-based logging analysis with event, interval, and daily histories
831C-SW Firmware option for direct USB support of Sierra Wireless RV-50 gateway
EPS044 Weatherproof outdoor hard case for Noise Monitoring System
COM-RV50X Sierra Wireless RV50 cellular 4G (XLTE) universal gateway for use in the US and Canada
PRM2103-FF Outdoor Preamplifier for Model 831 with Remote Calibration Check, humidity reading, and heater, 377B02 pre-polarized microphone.
EPS2116 Environmental protection for 1/2" preamplifiers, with windscreen and bird spike
SLP002 Portable folding 100 Watt solar panel with integrated stand and carrying case
BAT020 35 Ah SLA battery
PSA039 AC power supply for use with EPS044 & NMS044
Misc Cables and accessories
Communication 4G LTE modem included (data plan optional, see above), WiFi for close proximity data pull, and Ethernet available
Software G4 LD Utility Software for remote connection to meter: set up, control, view live data, and generate reports