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Larson Davis · SoundExpert Series 821 · Handheld sound level meter

SoundExpert 821ENV

Current

Multi-purpose environmental sound level meter with a 480 x 800 colour touch screen, microSD storage, Bluetooth, USB-C and wireless charging. Class 1 (821ENV) and Class 2 (721ENV) versions; 1/1 and 1/3 octave analysis standard on -D models, with optional dosimetry and sound recording. For community and general-purpose noise work, attended or in an outdoor kit.

Launched 2023. Specifications verified on .

Type
Handheld sound level meter
Class
Class 1
Channels
1
Octave bands
1/1 and 1/3
Connectivity
USB-C, Bluetooth LE 4.1
Weight
383 g
Battery life
40 h
Compare with other instrumentsAll handheld sound level meters

Specifications

As published by Larson Davis. Fields the manufacturer does not publish are omitted rather than estimated.

Standards and class — SoundExpert 821ENV
SpecificationValue
IEC 61672-1 classClass 1
StandardsIEC 61672-1:2013 class 1, ANSI S1.4-2014 class 1, IEC 61260:2014 class 1 (optional filters), ANSI S1.11-2014 class 1 (optional filters), IEC 61252:2017 (optional dosimetry), ANSI S1.25-1991 (optional dosimetry), ANSI/ASA S12.2-2019 (optional NC/RC ratings)
Pattern approvalsPTB
Measurement — SoundExpert 821ENV
SpecificationValue
Channels1
Measurement range17 to 140 dB(A) typical dynamic range
Frequency weightingsA, C, Z
Time weightingsF, S, I
ParametersLeq, Lmax, Lmin, Lpeak, Ln (6 values), Ldn, Lden, time above, NC/RC ratings (option), Dose and TWA (option)
DosimetryYes
Analysis — SoundExpert 821ENV
SpecificationValue
Octave bands1/1 and 1/3
Octave band filter classclass 1 (IEC 61260:2014); 1/1 octave 8 Hz to 16 kHz, 1/3 octave 6.3 Hz to 20 kHz
Audio recordingYes
Logging and data — SoundExpert 821ENV
SpecificationValue
Shortest logging interval100 ms (time history); measurement history 1 min to 6 h
Memory8 GB microSD standard, expandable to 256 GB
Hardware — SoundExpert 821ENV
SpecificationValue
Microphone1/2" prepolarised free-field 377B02 (821); 375A04 (721); preamplifier PRM821 or PRM721
Detachable preamplifierYes
Outdoor microphone kitPRM2105 outdoor preamplifier; outdoor noise kit with battery, solar or mains power
Display480 x 800 colour capacitive touch screen
Batteryinternal rechargeable lithium; charging by Qi wireless, USB-C or external 6 to 24 V DC
Battery life40 h
Weight383 g
Dimensions (mm)260 x 83 x 32
Operating temperature (°C)-30 to 60
Connectivity and software — SoundExpert 821ENV
SpecificationValue
ConnectivityUSB-C, Bluetooth LE 4.1
Remote controlG4 LD Utility; LD Atlas app
SoftwareG4 LD Utility, LD Atlas

Variants

Variants of the SoundExpert 821ENV as the manufacturer names them
VariantDifference
821ENVClass 1, 377B02 microphone and PRM821 preamplifier, no octave band analysis
821ENV-DClass 1 with 1/1 and 1/3 octave band analysis and NC/RC ratings standard
721ENVClass 2, 375A04 microphone and PRM721 preamplifier, no octave band analysis
721ENV-DClass 2 with 1/1 and 1/3 octave band analysis standard; NC/RC ratings optional

Where this data comes from

Manufacturer documents used for this record
KindDocumentAccessed
Product pageSoundExpert Sound Level Meter Series 821ENV
DatasheetSoundExpert Model 821 datasheet DS-0259
Press releaseProduct and support announcements (821ENV released July 2023)

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-soundexpert-821env).

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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