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The Larson Davis SoundAdvisor Sound Level Meter Model 831C, an IEC 61672-1:2013, ANSI S1.4-2014 Class 1 integrating sound level meter, is designed to make noise measurement and decibel level measurement easy. Due to its connectivity, extensive software features, and small form factor the SoundAdvisor 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, SoundAdvisor offers an elegant solution for complex needs in an easy-to-use system.
View Brochure for complete specifications
| Internal Memory | 2 GB standard, expandable via USB memory stick |
| Dynamic Range | 120 dB (20 – 140 dB standard range) |
| Frequency Weightings | A, C, and Z (simultaneous) |
| Time Weightings | Slow, Fast, and Impulse |
| Power Supply | 4 AA batteries provide over 18 hours of operation |
Popular preconfigured SoundAdvisor Model 831C kits for short term studies in controlled environments or for use with your own longer-term power and environmental protection.
| Model | Description |
|---|---|
| K831C‑L | Logging Analyzer Kit |
| K831C | Logging Analyzer Kit with 1/1 and 1/3 Octave |
| K831C‑H | Logging Analyzer Kit with 1/1 and 1/3 Octave band analysis plus sound recording |
| Firmware | Description | K831C‑L | K831C | K831C‑H |
|---|---|---|---|---|
| 831C‑LOG | Logging of Time Histories increments from 2.5 ms to 24 hr | ⚫ | ⚫ | ⚫ |
| 831C‑ELA | Measurement History exceedance/event logging, intervals and daily histories | ⚫ | ⚫ | ⚫ |
| 831C‑OB3 | Selectable Real Time 1/1 and/or 1/3 octave filter set | – | ⚫ | ⚫ |
| 831C‑SR | Sound Recording level and dynamic based event recording and more | – | – | ⚫ |
| 831C‑FFT | FFT Frequency Analysis spectral analysis of sound and vibration signals | ⚬ | ⚬ | ⚬ |
| 831C‑SCH | Scheduling Tools scheduling for measurements, communication options, and alert levels | ⚬ | ⚬ | ⚬ |
⚫ – Standard with Rental
⚬ – Optional Addition
Outdoor noise monitoring kits include meter, microphone, preamplifier, user selectable tripod, EPS2116 environmental protection kit, and battery case. For more detailed information, please visit our page on outdoor noise monitoring kits.
| Model | Description |
|---|---|
| NMS831C‑L | Outdoor Logging Noise Monitoring System. Includes 831C meter with LOG, ELA, and firmware, microphone, preamplifier, user selectable tripod, EPS2116 environmental protection kit, and battery case. |
| NMS831C | Same as NMS831C-L, but adds OB3 firmware |
| NMS831C‑H | Same as NMS831C-L, but adds OB3 and Sound Recording firmware |
| NMS044-SLA100 | Complete 831C based noise monitoring system capable of remote data access, email and text alerts when connected to internet via Ethernet, Wi-Fi, or Cellular network. Solar panel included to charge battery. |
| Firmware | Description | NMS831C‑L | NMS831C | NMS831C‑H | NMS044-SLA100 |
|---|---|---|---|---|---|
| 831C‑LOG | Logging of Time Histories increments from 2.5 ms to 24 hr | ⚫ | ⚫ | ⚫ | ⚫ |
| 831C‑ELA | Measurement History exceedance/event logging, intervals and daily histories | ⚫ | ⚫ | ⚫ | ⚫ |
| 831C‑OB3 | Selectable Real Time 1/1 and/or 1/3 octave filter set | – | ⚫ | ⚫ | ⚬ |
| 831C‑SR | Sound Recording level and dynamic based event recording and more | – | – | ⚫ | ⚬ |
| 831C‑SW | Direct support of Sierra Wireless RV-50 gateway | ⚫ | ⚫ | ⚫ | ⚫ |
| 831C‑SCH | Scheduling Tools scheduling for measurements, communication options, and alert levels | ⚬ | ⚬ | ⚬ | ⚬ |
⚫ – Standard with Rental
⚬ – Optional Addition
831C Kits provide an easy out of the box solution for most testing situations. If additional hardware or software are needed for more complex setups, The Modal Shop can help. GPS, Voice Annotation, and many other options are available. View Sound Level Meter Selection Sheet for more details.
| Model | Description |
|---|---|
| Included Standard | |
| 377B02 | 1/2" freefield microphone standard (other options available) |
| PRM831 | Preamplifier |
| EXC010 | Microphone extension cable, 10 ft |
| KBAT15 | AA battery kit for short term use, with recharger |
| PSA029 | AC power adapter |
| CBL138 | USB cable to connect to AC adapter or computer |
| WS001 | 3-1/2" windscreen |
| DVX014 | USB WiFi dongle |
| CCS001-831 or CCCS-001-831-4 | Rugged hard shell case for individual or multiple meters |
| Software | G4 Utility software for meter setup and data download |
| Accessories | Calibration data, manual sets, computer interface accessories and an acoustic calibrator |
| Optional with Handheld SLM Kits | |
| SWW-DNA | Data Navigation and Analysis Software – navigate through extensive data with measurement organization, reporting, and data post-processing tools |
| BAS001 | Omnidirectional (Dodecahedral) Source for reverberation time, room acoustic and building acoustic measurements |
| BAS002 | Power Amplifier for BAS001 and BAS002 |
| TRP023 | Tripod for omnidirectional source and directional source |
| CAL200 | Precision Sound Level Calibrator for 1/2" Microphones |
| 831-GPS | USB cable to connect to AC adapter or computer GPS unit for 831C – provides global positioning information to 831C data, connects via AUX USB connection |
| ACC003 | Headset with microphone boom – 2.5 mm micro-jack, for voice annotation |
| ADP074 | ICP® interface cable – allows connection of a single axis ICP accelerometer, provides BNC connection |
| Optional with Outdoor Kits | |
| 079A15 | Microphone stand with boom attachment and adaptor ≠ Boom connector has 5/8"-27 stud, converts to 1/4"-20 stud with included adapter. Height adjusts from 36" to 63", 30' boom length, 23" base spread. Generally used to mount preamp/mic via 079A11 clip. Lightweight tripod, not recommended for unattended monitoring. |
| 079A11 | Microphone clip for 1/2" microphones – Microphone holder designed to attach to 1/4"-20 stud. Height from base to center of holder is 1". |
| EPS042 | Small environmental enclosure kit – with BAT015 battery holder with fuse, (8) D-cell batteries included. Typically provides 5 days of operation. |
| EPS047 | Rugged environmental enclosure kit – with BAT024 for 12 D-cell batteries (batteries not included) and gland for microphone extension cable and weather sensor. CBL224-02 NOT INCLUDED |
| EPS2116 | Environmental protection kit for 1/2" PRM831 – with windscreen, bird spike, rain hat, desiccants, and flexible mounting options. |
| SEN031 | Combined weather sensor – Wind speed and direction, temperature, humidity, pressure, rainfall (requires CBL167 cable + DVX008A) |
| BAT011 | DC 12 V 21 Ah External Sealed Lead Acid Battery – Nonspillable 6" x 9" x 4" 10 lb unit, charger included upon request |
| CBL168 | External Power Cabling for One External 12V DC Battery |
| CBL143 | External Power Cabling for Two External 12V DC Batteries |
| EXC | Microphone Extension Cables – Various lengths available: EXC010 for 10 ft, EXC020 for 20 ft, EXC050 for 50 ft, EXC100 for 100 ft |
For more articles, videos, and Tech Talks, visit our Education Portal
FFT analysis is useful in identifying key frequencies of a signal. The Sound and Vibration FFT Analyzer Model 83C-FFT pairs SoundAdvisor™ Sound Level Meter with FFT Firmware for machinery troubleshooting, noise source identification, tone detection, and more.
Outdoor Noise Monitoring System Model NMS044 offers access to measurements and noise limit exceedance alerts from any Internet connected device. With either a solar panel or line power, measurements can be collected virtually indefinitely.
(*) Indicates an available option
| Organization | Standard |
|---|---|
| ANSI | S1.4-2014 Class 1 and S1.43-1997 Type 1 |
| S1.11-2014 Class 1, all filters [Octave Filter Standards, Option 831C-OB3] | |
| IEC | 61672-1 Ed. 2.0 (2013) Class 1, Group X |
| 60651 Ed 1.2 (2001) plus Amendment 1 (1993-02) and Amendment 2 (2000-10) Type 1, Group X | |
| 60804 (2000-10) Type 1, Group X | |
| 61260 Ed. 2.0 (2014) Class 1, all filters [Octave Filter Standards, Option 831C-OB3 | |
| 61010-1 Ed. 3.0 (2010-06) [Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use] | |
| 61326-1 Ed. 2.0 (2012-07) and 61672-1 Ed. 2.0 (2013-09) [EMC Immunity and Emission] | |
| OTHER | DIN 45657 |
| 2006/95/EC Low Voltage Safety Directive | |
| 2004/08/EC EMC Directive | |
| FCC Title 47 CRF Part 15, Class B | |
| Pattern Approvals | LNE |
| PTB | |
| METAS (paired with Preamplifier Model PRM2103) | |
| METAS (paired with Preamplifier Model PRM831) |