SoundCity 831C noise meter

Price: Liên hệ

Model 831C
Manufacturer Larson Davis
Power supply
Condition Còn hàng
Warranty 12 tháng

Sound meter

I. Specification of noise meter SoundCity 831C

Simplify measurements:

  • Connectivity is key - All cellular, WiFi and wired networks are available to you when using the SoundCity sound meter. This meter can even act as its own WiFi hotspot.
  • Multiple platforms, same control - Whether you're setting up checks on your watch, checking in remotely from your laptop or receiving alerts from your smartphone, you'll be working with the same one interface and menu on all platforms.
  • Customizable for your application - From complete outdoor trackers to low-noise options to automatic event detection, SoundCity acoustic meters are designed to help meet the testing needs of Friend.
  • Color LCD Interface - Full color user interface allows you to interpret data more easily, right from the meter.
SoundCity 831C noise meter

Technical optimization:

  • A thoughtful design process that ensures your needs are met, from international standards to functionality.
    • IEC 61672-1: 2013, ANSI S1.4-2014 Class 1 built-in sound level meter
    • Real-time frequency analysis in frequency bands 1/1 and 1/3 octave, IEC 61260: 2014 and ANSI S1.11-2014 Class 1 compliant
    • > 120 dB dynamic range
    • 2 GB internal memory, expandable by USB
    • Full range AC output
    • Low noise option available (831C-LOWN).
  • The Larson Davis SoundCity 831C noise meter is extremely versatile, performing the functions of several instruments. It puts the combined features of an accurate Class 1 sound level meter, environmental noise analyzer and real-time frequency analyzer in the palm of your hand or on the net. It expands on the tradition of cutting-edge equipment that precedes it in providing value, innovation and functionality in a rugged, one-handed, expandable package backed by a factory warranty. 2 years, 24 hour application support, complete customer satisfaction, and accredited/calibrated factory service.
SoundCity 831C noise meter

Solutions with your instrumentation:

  • Easy setup and data download – SoundCity meters offer direct setup on the keypad, touch screen or via the meter's web interface, with streamlined data export to Excel® physical.
  • ANY LEVELTM - Never miss an important audio metric with the ability to view and store multiple time weights (Slow, Fast, and Pulse) and frequency weights (A, C and Z) simultaneously.
  • Integration flexibility - Designed to allow integration into a larger or custom solution, SoundCity enables the connection of accessories, internal meters for accurate data synchronization and interoperability. like with the local language.
Sound meter

The solution with your outdoor set:

  • On-Demand Data - Access the meter from any location to make setup modifications, view current noise levels, and modify alarms.
  • Instant Alerts - Get instant notification of noise events and use recorded audio files to assess the cause.
  • Long-Term Remote Power - Lithium Iron Phosphate batteries combined with a solar panel provide a continuous, sustainable means of keeping your measurements running.
  • Avoid field trips - With access to measurements, event alerts, and uninterruptible power, you can spend time in the office, instead of traveling to remote locations.
SoundCity 831C noise meter


  • Cellular, WiFi or Wired - Choose your network by choosing what to plug into the USB port. You can choose cellular using the Sierra wireless gateway for portable or permanent applications, WiFi for near wireless, and wired (Ethernet) for fixed locations. One USB hub can be used to support multiple USB devices.
  • Expandable USB Memory - Easily expand the 831C memory by adding a USB memory stick. Data is written directly to the USB memory so it is always available and the data is protected if the USB memory is accidentally removed..
SoundCity 831C noise meter ***Gmga sound level meter:

II. Specifications of SoundCity 831C noise meter


Reference Level

114.0 dB re. 20 μPa
Reference Level Range

Single large range for SLM measurements

Reference Frequency

1000 Hz
Reference Direction

0° is perpendicular to the microphone diaphragm

Operating Temperature

≤ ± 0.5 dB error between -22°F to +122 °F (-30 °C to 50 °C)
Storage Temperature

-40 °F to 176 °F (-40 °C to 80 °C)


≤ ± 0.5 dB error from 30% to 90% relative humidity at 104 °F (40 °C)
Equivalent Microphone Impedance

12 pF

Effect of an Extension Cable

None up to 200 ft (61 m) with EXCxxx cable


Extended Weather Options

-40 °F to +158 oF (-40 °C to +70 oC) operation with CER-831-E

Resolution Specifications


0.1 dB

lapsed Time

0.1 s

Real Time Clock


Integration Time

Time Averaged Levels and Sound Exposure Levels


0.1 s

Maximum with Daily Autostore Enabled

Maximum with Daily Autostore Disabled

> 23 days with error < 0.5 dB

Ln Statistics

Number of Selectable Parameters

6 in xx.xx% format

Spectral Statistics

Requires Octave Analysis option (831C-OB3)


Number of Markers

Prenamed Markers

Truck, Automobile, Motorcycle, Aircraft, Exclude

Back Erase

Back Erase Time


Measurement Control Modes

Available Modes

Manual Stop, Timed Stop, Stop when Stable, Continuous, Single Block Timer, Daily Block Timer

Timed Stop

Time in hh:mm:ss
Stop When Stable

Delta level in xx.x dB and time in hh:mm:ss

Continuous with Daily Auto-Store

1, 2, 4, 6, 12, 24, 48, 96 or 144 files per day, automated file numbering “yymmddnn.LD0”
Restart after Power Failure

Automatic if powered by 12 VDC and continuous run mode

Single Block Timer

Start date and time to end date and time
Daily Block Timer

Up to 3 blocks between each start and end date

Clock Stability




Microphone Input


Latching 5-pin connector

Input Impedance

100 kΩ and 300 pF
Full Scale Input (0 dB gain)

14 Vpeak

ICP Current (requires ADP074)


AC/DC Output


2.5 mm (32 in) female
AC Output Voltage Range

± 14 Vpeak (preamplifier output)

± 2.1 Vpeak with 0, 20 or 40 dB gain (for LINE inputs)

AC Output Recommended Load

10 kΩ or greater

DC Output Voltage Scale

10 mV per dB, 0 V for 0 dB, 1 V = 100 dB
DC Output Frequency & Time Weighting

Follows SLM Settings: A, C, or Z and S, F, or I

Power Supply


4-AA (LR6) NiMH, 1.5 V Lithium or Alkaline cells (supplied with 2500 mAh NiMH)

External Power (5 V from USB)

USB Mini-B connector to

* USB interface from computer

* PSA029 AC to DC power adaptor

External Power

I/O connector: 10 to 25 VDC (Use cable CBL140)

Operating Time (with power save options)

> 18 hours (1.5 V Lithium batteries) > 8 hours (Alkaline or NiMH batteries) 
Power Consumption with PRM831

1.1 W (backlight off, running)

≤ 2 W (with DVX012)

5 W (maximum)

Memory Retention

Data Memory

Non-volatile flash memory, backup performed every minute

Real-time Clock

≥ 1 year with batteries removed

Broadband Noise Levels

Self-generated Electrical Noise

0 dB Gain 20 dB Gain
Weighting Typical (dB) Max (dB) Typical (dB)

Max (dB)


10 12 6 9
C 13 16 12



22 25 22 25
Self-generated Total Noise 0 dB Gain

20 dB Gain


Typical (dB) Max (dB) Typical (dB) Max (dB)
A 16 19 16



17 20 16 19
Z 23 26 23


Note: Combination of the electronic noise and the thermal noise of the 377B02 microphone at 68 °F (20 °C) measured in a sealed and vibration isolated cavity with an averaging time of 60 seconds. Electronic noise of the instrument with an ADP090 (12 pF) in place of the microphone highest anticipated self-generated noise.


III. Video

  ***Watch more videos of the device at: Gmga Measuring Youtube

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