Want a sound level meter that works like your phone? The SoundExpert Model 821 does just that with a large touch display viewable in any condition. Whether making handheld noise measurements or measuring environmental noise for several weeks, the SoundExpert Model 821 is an excellent choice for ease of use and low power operation.

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Highlights Large, responsive touch display
Long battery life – up to 40 hours
IP65 rated against dust and moisture
Automatic data download via Bluetooth or USB options
Flexible powering options, including wireless charging
Class 1 and Class 2 models available
Applications Environmental noise
City noise
Environmental impact studies
Construction noise
Monitoring noisy venues

Noise Monitoring at Your Fingertips

The SoundExpert Model 821 in its basic form includes the essentials for measuring noise by providing:

  • A, C, and Z frequency weightings
  • F, S, and I time weightings
  • Full featured data logging

Using the included G4 LD Utility software, data can be downloaded, visualized, manipulated, and exported to a variety of formats including Microsoft Excel® .xlsx.

For more advanced applications, options such as 1/1 or 1/3 octave filters for frequency analysis are available. When protection and extra power are needed for unattended outdoor noise measurements, choose from a variety of protective cases with batteries, solar power, and grid/mains power capabilities.

The SoundExpert Sound Level Meter Model 821 together with Larson Davis quality and customer support delivers a professional solution you can trust.

Specifications for model 821ENV
Dynamic Range (A-weighted typical) 14 to 140 dB
Time Weightings Fast, Slow, & Impulse
Frequency Weightings A, C, & Z
Data Storage (micro SD card) 8 GB standard. Up to 256 GB
Data Logging Time history: 100 ms to 1 h
Measurement History: 1 min to 6 h
Metrics Leq, Lmax, Lmin, Lpeak, Ln (6 values), LDN, LDEN

Available Configurations

SoundExpert Sound Level Meter is available as a Class 1 or Class 2 device and with or without Octave Band Analysis.

SoundExpert Sound Level Meters
Model 721ENV 721ENV-D 821ENV 821ENV-D
Class 2 2 1 1
Time History Logging
Measurement History
Community Noise Metrics
OBA (1/1 and 1/3 Bands)    
Standards and Approvals for Series 821ENV
Acoustic ANSI S1.4-2014 Class 1
IEC 61672-1:2013 Class 1
Noise Dosimetry (Optional) ANSI S1.25-1991
IEC 61252:2017
Safety Directive 2014/35/EU
IEC 61010-1:2010
RoHS Directive 2011/65/EU
Approvals CE, RoHS, WEEE

See the configuration guide for all accessories.