Larson Davis · SoundAdvisor · Handheld sound level meter
SoundAdvisor 831C
CurrentClass 1 integrating sound level meter and analyser with a colour touch screen, built as a modular platform: logging, event history, 1/1 and 1/3 octave filters, FFT with tone assessment, room acoustics, sound recording and scheduling are firmware options. Used for environmental, community and occupational noise and as the core of the NMS044 and NMS045 outdoor systems.
Replaced the Model 831. Specifications verified on .
- Type
- Handheld sound level meter
- Class
- Class 1
- Channels
- 1
- Octave bands
- 1/1 and 1/3
- Connectivity
- USB Mini-B, Ethernet (831-INT-ET or DVX012 adapter), WiFi (DVX014 adapter), cellular gateway (option 831C-SW, Sierra Wireless RV50X), GPS (GPS002 receiver), AC output, I/O connector
- Weight
- 532 g
- Battery life
- 8 h
Specifications
As published by Larson Davis. Fields the manufacturer does not publish are omitted rather than estimated.
| Specification | Value |
|---|---|
| IEC 61672-1 class | Class 1 |
| Standards | IEC 61672-1:2013 class 1, IEC 60651 type 1, IEC 60804 type 1, ANSI S1.4-2014 class 1, ANSI S1.43-1997 type 1, DIN 45657, IEC 61260:2014 class 1 (option 831C-OB3), ANSI S1.11-2014 class 1 (option 831C-OB3) |
| Pattern approvals | LNE, PTB, METAS (with PRM2103), METAS (with PRM831) |
| Specification | Value |
|---|---|
| Channels | 1 |
| Measurement range | single range; dynamic range > 120 dB; peak overload 143 dB with 50 mV/Pa microphone at 0 dB gain |
| Peak range | up to 143 dB peak (50 mV/Pa microphone, 0 dB gain) |
| Frequency weightings | A, C, Z |
| Time weightings | F, S, I |
| Parameters | Leq, Lmax, Lmin, Lpeak, Ln (6 selectable), Ldn, Lden, LCeq-LAeq |
| Specification | Value |
|---|---|
| Octave bands | 1/1 and 1/3 |
| Octave band filter class | class 1 (IEC 61260:2014), 6.3 Hz to 20 kHz, option 831C-OB3 |
| FFT | option 831C-FFT (FFT analysis and tone assessment); line count not published on the pages read |
| Reverberation time | Yes |
| Audio recording | Yes |
| Specification | Value |
|---|---|
| Shortest logging interval | 2.5 ms (option 831C-LOG); minimum integration time 0.1 s |
| Memory | 2 GB internal, expandable via USB memory (831-MEMUSB) |
| Specification | Value |
|---|---|
| Microphone | 1/2" prepolarised free-field 377B02 (50 mV/Pa) or random-incidence 377C20; preamplifier PRM831 |
| Detachable preamplifier | Yes |
| Outdoor microphone kit | PRM2103 outdoor preamplifier with EPS2116 environmental shroud |
| Weather sensors | Yes |
| Display | 240 x 320 colour graphic LCD with touch screen |
| Battery | 4 x AA (NiMH 2500 mAh supplied; alkaline or 1.5 V lithium also usable); external 10 to 25 V DC or 5 V via USB |
| Battery life | 8 h |
| Weight | 532 g |
| Dimensions (mm) | 290 x 71 x 41 (with microphone and preamplifier); body 224 long |
| Operating temperature (°C) | -30 to 60 |
| Specification | Value |
|---|---|
| Connectivity | USB Mini-B, Ethernet (831-INT-ET or DVX012 adapter), WiFi (DVX014 adapter), cellular gateway (option 831C-SW, Sierra Wireless RV50X), GPS (GPS002 receiver), AC output, I/O connector |
| Remote control | built-in web interface from PC or mobile device; G4 LD Utility; LD Atlas app |
| Software | G4 LD Utility, LD Atlas, DNA |
| Latest firmware | 5.4 (version supported by reference manual I831C.01(S), 2025) |
Variants
| Variant | Difference |
|---|---|
| 831C-FF | with 377B02 free-field microphone and PRM831 preamplifier |
| 831C-RI | with 377C20 random-incidence microphone and PRM831 preamplifier |
| 831C-LOWN | low-noise configuration |
Where this data comes from
| Kind | Document | Accessed |
|---|---|---|
| Product page | SoundAdvisor 831C | |
| Product page | SoundAdvisor 831C specifications | |
| Manual | SoundAdvisor 831C Reference Manual I831C.01(S) | |
| Datasheet | SoundAdvisor 831C brochure MD-0324 | |
| Press release | Product and support announcements |
Verified on . Only the manufacturer’s own published material is used; distributor pages are not sources.
Spec out of date? Tell us (reference larson-davis-soundadvisor-831c).
Verified owner reviews
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Known issues and firmware notes
Hardware and firmware problems reported by owners, with the firmware version concerned and any manufacturer response.
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Feature requests
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Read next
- How to choose a sound level meter · Class 1 vs class 2, integrating vs non-integrating, parameters by application, options and licences, calibration.
- Class 1 vs class 2 sound level meters · IEC 61672-1 tolerances, what the classes do and do not say, and where each is typically required.
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