Sound level meter Larson Davis SoundAdvisor™ 831C

Sound level meter Larson Davis SoundAdvisor™ 831C is designed to make noise measurement easy. Due to its color display, connectivity, extensive software features, and small form factor the SoundAdvisor™ 831C is an ideal choice for handheld operation.

Attended measurements are simplified, with the ability to control and monitor data via any PC or mobile device with a standard web interface. Designed with the acoustic professional in mind, the Noise dosimeters Larson Davis SoundAdvisor™ 831C offers an elegant solution for complex needs in an easy-to-use system.

I. Specifications of Noise dosimeters Larson Davis SoundAdvisor™ 831C

Sound level meter Larson Davis SoundAdvisor™ 831C performs the functions of several instruments by combining the features of a precision Class 1 sound level meter, environmental noise analyzer, and a real-time frequency analyzer in one unit.

From app-based compatibility with LD Atlas™ to instant alert capabilities, Sound meter Larson Davis SoundAdvisor™ 831C is an ideal solution for a range of applications including environmental noise assessment, spectral noise analysis, reverberation time measurements, event detection, sound recording, and more.

• Environmental noise assessment
• Noise reduction validation
• Product quality control
• Spectral noise analysis
• FFT analysis and tone assessment
• In-situ sound power measurements
• Code enforcement.

SIMPLE MEASUREMENT

• Connectivity Is Key: Cellular, WiFi, and wired networking are all available to you when using the SoundAdvisor™ 831C. The Sound meter can even serve as its own WiFi hotspot.
• Many Platforms, Same Controls: Whether you are setting up a test on the Sound level gauges, checking in remotely from your laptop, or receiving an alert to your smartphone, you'll be working with the same interface and menus across all platforms
• Customizable for Your Application: From complete outdoor monitoring kits to a low noise option to automatic event detection, the Sound level meter Larson Davis SoundAdvisor™ 831C is designed to help meet your testing needs
• LCD Color Interface: A full color user interface allows you to interpret data more easily, right from the Noise dosimeters.

TECHNICALLY OPTIMIZED

• IEC 61672-1:2013, ANSI S1.4-2014 Class 1 integrating sound level meter
• Real-time frequency analysis in 1/1 and 1/3 octave bands, compliant
• with IEC 61260:2014 and ANSI S1.11-2014 Class 1
• >120 dB dynamic range
• 2 GB internal memory, expandable by USB
• Full range AC output
• Available Low noise option (831C-LOWN).

NOISE MONITORING SYSTEM OPTIONS

SoundAdvisor Model NMS044 Portable Noise Monitoring System
SoundAdvisor Model NMS045 Permanent Noise Monitoring System

TYPE APPROVALS/ PATTERN APPROVALS

• LNE
• PTB
• METAS (paired with Preamplifier Model PRM2103)
• METAS (paired with Preamplifier Model PRM831).

II. Sound level meter Larson Davis SoundAdvisor™ 831C - Solving your challenges

SOLUTIONS WITH YOUR METER

• Easy Setup and Data Download: SoundAdvisor™ 831C offers setup directly on the meter’s keypad, touchscreen, or via web interface, plus streamlined export of data to Excel®
• ANY LEVEL™: Never miss a key sound metric with the ability to view and store multiple time weightings (Slow, Fast, and Impulse) and frequency weightings (A, C, and Z) simultaneously.
• Flexibility for Integration: Designed to allow integration into a larger or customized solution, SoundAdvisor™ 831C allows connection of accessories, internal clock for accurate data synchronization, and local language compatibility.

SOLUTIONS WITH YOUR OUTDOOR KIT

• Data on Demand: Access your sound meter from any location to make modifications to the setup, view current noise levels, and modify alerts.
• Instant Alerts: Receive immediate notification of noise events and use the recorded sound files to evaluate the cause.
• Long Term Remote Power: Lithium Iron Phosphate batteries paired with a solar panel offer a continuous, sustainable means to keep your measurements running.
• Avoid Trips To the Field: With access to measurements, event alerts, and continuous power, you can spend time in the office, rather than traveling to reach remote locations.

CONNECTIVITY

• Cellular, WiFi, or Wired Networking: Select your network by choosing what to plug into the USB port. You can choose cellular by using a Sierra Wireless gateway for mobile or permanent applications, WiFi for close proximity wireless, and wired (Ethernet) for permanent locations. A USB hub can be used to support multiple USB devices.
• Expandable USB Memory: Easily expand the SoundAdvisor™ 831C memory by adding a USB memory stick. Data is written directly to the USB memory so it’s always available and the data is protected if the USB memory is accidentally removed.

III. Firmware for Noise meter Larson Davis SoundAdvisor™ 831C

REVERBERATION TIME MEASUREMENTS

Model: 831C-RA

• Reverberation times are used in architectural acoustics applications ranging from simple experimental reverberation time determination for room performance, to calculating absorption coefficients for material performance. SoundAdvisor™ with 831C-RA firmware measures decays and then computes reverberation time according to ISO or ASTM standards. When using the Interrupted Noise method, the SoundAdvisor not only triggers the data acquisition, but its built-in Noise Generator can be used to drive the omni-directional sound source. Integrated Impulse method is also available. Measurements can be made using 1/3 octaves or full octave bands. The meter computes the decay times automatically, shows the T20 and T30 spectra superimposed, computes seven (7) quality indicators per frequency, and grades the measurement data.
• The resulting data and decays can be exported to the G4 LD Utility or can be processed further in DNA for reverberation time, absorption coefficients, or sound insulation calculations.

MEASURED SOUND RECORDING

Model: 831C-SR

• Measuring sound levels is a well-accepted way to objectively quantify the noise radiated by a product in an environmental survey. Rather than rely simply on the objective data, why not record a sample of the sound to truly determine the source of the noise?
• The firmware 831C-SR option enables the SoundAdvisor to record audio files in a raw format (.wav) for lossless recording or with .ogg compression to reduce file size. Listen live or to recordings from the meter, or listen to recordings from G4 LD Utility Software or LD Atlas Mobile App. Record audio of automatically triggered events, at the beginning of each Measurement history, manually, or with logic level input.

OCTAVE BAND ANALYSIS

Model: 831C-OB3

• In many applications, it is important to acquire both the broadband level and spectral content of noise data. With spectral information, the source and content of the measured level can be better understood. Constant percentage bandwidth filters (1/1 or 1/3 octave) best approximate human perception of sound.
• Option 831C-OB3 firmware enables simultaneous real-time measurement of 1/1 and 1/3 octave Leq, Lmax, Lmin along with all the ANY LEVEL™ broadband parameters. Option 831C-OB3 is compliant with IEC 61260:2014 Class 1 and ANSI S1.11-2014 Class 1 standards covering the entire frequency range of human hearing: 6.3 Hz to 20 kHz for 1/3 octave bands.
• When 831C-OB3 is combined with Time History Logging (831C-LOG) or Automatic Event Detection and Event History (831C-ELA), it is possible to review the frequency content of logged data or specific events.

FFT SOUND AND VIBRATION ANALYSIS

Model: 831C-FFT

• ISO/PAS 20065:2016
• ISO 1996-2:2007 Annex C
• ISO 1996-2:2017 (ISO/PAS 20065).

ACOUSTIC PARAMETER LOGGING

Model: 831C-LOG

The Sound level meter Larson Davis SoundAdvisor™ 831C can be used to record the evolution of sound pressure level over time as a Time History (TH). The Time History is then used to profile the observation period, which can vary from several seconds to continuous monitoring.

With the addition of Time History Logging Firmware (831C-LOG), users can pre-select from logging periods as small as 20 ms to a full 24 hours. Parameter selections consist of familiar acoustic metrics as well as non-acoustic metrics, such as battery condition, outdoor microphone performance, and meteorological data (831C-WTHR).

(Selected Frequency and Time Weighting Parameters for 1/1 and 1/3 Octaves)

• Leq
• Lmin
• Lmax

• Lweq
• Lwpeak
• LwSmax
• LwFmax
• LwImax
• LwSmin
• LwFmin
• Lwlmin
• LwS
• LwF
• Lwl

• LCeg - LAeg
• LIeg - LAeg
• Statistics (Ln)
• Battery
• Temperature
• External Power
• Wind Speed
• Gust Direction
• Gust Speed
• Avg Temp
• Max Temp
• Min Temp
• Avg Humidity
• Max Humidity
• Min Humidity.

MEASUREMENT HISTORY

Model: 831C-ELA

• While Time Histories are typically logged at one sample per second, longer- term averages are often useful to see trends, e.g., 10 minute or hourly averages. 831C-ELA firmware enables Measurement History (MH) and logs these parameters similar to Time History (TH) over a longer interval time. MH and TH can run together simultaneously or independently.
• Data for each measurement or location is saved in a unique MH record and may include the Leq, Lmax, Lmin, SPL, and statistical distribution of the SPL (Ln). A complete set of MH records then can be stored in a single measurement that keeps all the noise survey data in a single file. Finally, an automated sound recording at the beginning of each MH period can be achieved with 831C-SR firmware.

AUTOMATIC EVENT DETECTION AND ALERTS

Model: 831C-ELA

• Exceedance of a fixed threshold level for a minimum duration
• Exceedance of a dynamic threshold level for a minimum duration
• External trigger set by the digital input signal.

With 831C-ELA firmware, event definition is defined by you – including threshold level, duration, and event continuation period when the SPL drops below the threshold level for a specific period of time. Triggering status icons identify event progression and qualification (see graph above).

SoundAdvisor™ 831C can automatically generate an email alert to provide fast notice of any noise exceedance. The event alerts can be sent to a user configurable list of email addresses or by text message using an email to MMS gateway. Email event sound recording in conjunction with option 831C-SR.

NOISE MONITORNING SCHEDULING TOOLS

Model: 831C-SCH

• Data and alerts are often needed only on certain days or specific times. With 831C-SCH firmware, schedule run/stop times, modem usage, and alert type and recipient. Together with the optional event feature, 831C-ELA, trigger levels and alert recipient can be adjusted for time of day or day of the week. In conjunction with 831C-SW firmware, schedule power to the modem - conserve power when the modem is not needed.
• With the graphical interface in G4 LD Utility software, easily configure SoundAdvisor™ 831C to measure and report only what you need, even when those needs change.

CELLULAR COMMUNICATION

Model: 831C-SW

• We understand how beneficial it can be to have access to your noise monitor at any time of the day. Due to the remoteness or need to setup contracts and get permits, connecting a noise monitor to a wired network or main power just isn’t feasible.
• With option 831C-SW you can connect the Sound meter Larson Davis SoundAdvisor™ 831C by USB directly to a Sierra Wireless gateway and get a highly portable noise monitor that can easily be powered by battery and/or solar. We recommend the Sierra Wireless model RV50X because of its low power usage and industrial design.

IV. Software solutions for Sound level meter Larson Davis SoundAdvisor™ 831C

G4 LD UTILITY SOFTWARE

• Store measurement set-ups for use on one or more Sound Level Meters
• Download data to PC and export to Excel® for further analysis
• Connect to 831C-based meters and noise monitoring systems via USB, Ethernet, or cellular connection
• Manage multiple noise meters and systems with simple and convenient project and file management
• View time history data in graphical format
• Listen to audio recordings
• View Sound Level Meter screen on your PC – ideal for presentations or training.

LD Atlas™ MOBILE DEVICE APPLICATION

• Install the free LD Atlas on your phone or tablet – iOS or Android – and connect to your SoundExpert™ Sound Level Meter 821ENV, Spartan™ Sound Level Meter Series 821IH, Spartan™ Noise Dosimeter Model 730, SoundAdvisor™ Sound Level Meter Model 831C, and Human Vibration Meter Model HVM200.

DATA SERVICE WEB-BASED NOISE MONITORING

• Data Service is a cloud-based tool that provides both public access to noise levels and easy access to in-depth historical noise data and reports.
• Data Service collects data from Larson Davis SoundAdvisor™ 831C noise monitors and presents the information in a format accessible and appropriate for all stakeholders.

SoundLink SOFTWARE SERVICES

• SoundLink Service enables remote access worldwide. This solution reduces labor costs, simplifies data gathering, and allows for remote status monitoring and quick responses to noise concerns. SoundLink is compatible with Model 831C, NMS044, and NMS045.

DATA NAVIGATION AND ANALYSIS SOFTWARE (DNA)

• Remote network access
• Interactive graphs with data: zoom, overlay Time History and spectrogram with playable event sound recordings, advanced event analysis, mapping, industrial hygiene, and more.
• Template-based operation with customizable options.

SOFTWARE DEVELOPMENT KIT (831C-SDK)

• Build your own software or integrate the SoundAdvisor into your existing application using our Software Development Kit (SDK).
• The Software Development Kit for the Sound level meter Larson Davis SoundAdvisor™ 831C interfaces smoothly and directly with Microsoft® or Linux® programming environments supporting Excel®, HTML5, Javascript, Visual C++, or C# programming languages. The SDK provides functionality to connect and fully control the Model 831C over USB, network, or wireless gateway (modem) connections. File download is supported and the SDK includes documentation and software for extracting data from files. With JSON (JavaScript Object Notification), the SDK makes it easy to create modern, web-based applications with minimal effort.

V. Noise monitoring system Larson Davis SoundAdvisor™

Larson Davis SoundAdvisor™ Noise Monitoring Systems offer you access to measurements and event alerts from any Internet connected device, allowing you to spend time in the office rather tha traveling to remote locations.

For the life of your system, as part of our commitment to Total Customer Satisfaction, we offer you free firmware upgrades to keep your system up-to-date as well as support from our team of trained application engineers.

We know what it takes to make your measurements.

PORTABLE OUTDOOR NOISE MONITORING WITH SOUND RECORDING

Model: NMS-SE-831C

Need a Noise Monitoring System that you can deploy outdoors, collect measurement data, and then retrieve for analysis?

Powered with SoundAdvisor Sound Level Meter Model 831C, Model NMS-SE-831C with 831C-SR firmware is a rugged, portable solution that can make sound recordings for easier noise source identification.

• Ideal to deploy, measure, download, then analyze
• Records sound for noise source identification*
• Includes SoundAdvisor Sound Level Meter SoundAdvisor™ 831C.

Applications:

• Mining operations noise monitoring
• Construction site noise monitoring
• Wind turbine noise monitoring
• Entertainment venue noise monitoring
• Unattended noise monitoring.

PORTABLE NOISE MONITORING SYSTEM

Model: NMS044

Larson Davis has created a new standard for portable noise monitoring by making the SoundAdvisor™ Portable System Model NMS044 completely wireless with solar charging and 4G wireless while keeping it truly portable.

The SoundAdvisor™ Noise Monitor System includes everything needed for a noise monitor (powered by SoundAdvisor™ Model 831C Class 1 sound level meter) that can run indefinitely while remaining connected to the Internet making your meter and your data always readily available.

• Consultancy Projects – The portability of NMS044 offers an ideal solution for consultants performing noise studies for different customers in different locations on a regular basis.
• Short-Term Airport Noise Monitoring – Airport noise is frequently a complaint for those living nearby and in landing patterns. The NMS044 allows airports to monitor noise issues as they arise in specific locations.
• Short-Term Construction Noise Monitoring – Monitoring during a building period is often of a short-term commitment that recurs with each new project. When one job is complete, pack up the NMS044 and move to the next location.

• Network Access 24/7: Login from your computer, your smartphone or other mobile device to engage directly 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: With a low power requirement (831C ~1.2 W / 831C + Cellular gateway ~3.5 W) options are available to power the remote unit via solar power, keeping your measurements running indefinitely and sustainably
• Real-Time Alerts: Receive email or texts with data and sound recordings when set noise limits are exceeded. Allows quick response to compliance concerns and listening to sounds for source identification
• Own Your Data: Control your data without monthly access and maintenance costs.

• The SoundAdvisor™ Portable System is offered with a choice of a traditional lead acid (SLA) battery or a Lithium Iron Phosphate (LiFePo) battery. LiFePo batteries recognize a significant improvement over Lithium ion technology, offering extended life of over 2500 recharge cycles and safer automation. The LiFePo battery provides high capacity at half the weight of a comparable SLA battery with a longer life and great low temperature performance.
• The SoundAdvisor™ Kit can be configured with a portable 100 watt solar panel. For situations in which an external power supply is readily available, the SoundAdvisor™ Kit can be configured without a solar panel or battery. Note that although the NMS044 can be run on line power, the user must supply a battery for proper operation.

PERMANENT, LONG-TERM NOISE MONITORING SYSTEM

Model: NMS045

The SoundAdvisor™ Permanent Noise Monitoring System Model NMS045 is available in a variety of configurations to meet your long-term monitoring needs.

Model NMS045 shares many of the same benefits as Portable Noise Monitoring System Model NMS044, from 24/7 connectivity to continuous power capabilities, designed to simplify your testing. Now, the key elements of the portable system are available in a permanent setup, encased in a fiberglass enclosure mounted to a permanently placed pole.

When you need to monitor the same location long-term, the NMS045 is the right choice for you.

• Permanent Airport Noise Monitoring: NMS045 allows airports to meet their requirements for long term noise monitoring, delivering a broad scope of measurement data continuously
• Long-Term Construction Noise Monitoring: When construction will be a long term long project, NMS045 is a permanent monitoring solution offering durability and protection against vandalism and damage, so your measurements can continue uninterrupted
• Permanent City Noise Monitoring: Whether you are monitoring near a bridge, busy street, factory, or nightclub, NMS045 helps you continuously measure noise levels, providing the data to create a more pleasant and ordinance-compliant community.

• Rugged Reliability: an environmental protected enclosure and durable mounting options create an easy-to-maintain solution for your permanent monitoring
• Installation Simplicity: a range of installation options coupled with a low power design allows you to run your system with a battery charged via a solar panel or through an AC main
• Flexible Placement: when AC power isn’t available or is costly to run, remote deployment is simplified with solar powered options
• Connectivity is Key: 4G cellular, WiFi, or wired networks allow you to control your meter and view your data from anywhere.

VI. Ordering information of Sound level meter Larson Davis SoundAdvisor™ 831C

Technical specifications of Sound level meter Larson Davis SoundAdvisor™ 831C