SoundExpert Series 821

Short description

Product Noise Evaluation and Environmental Noise | Series 821ENV

Want a sound level meter that works like your phone? The SoundExpert® Model 821ENV 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 821ENV is an excellent choice for ease of use and low-power operation.

Larson Davis
Series 821


Product Details

SoundExpert is also available in a Class 2 version, SoundExpert Model 721ENV. Please see Configurations below or download the datasheet for more details.


  • Large, responsive touch display
  • Long battery life – up to 40 hours
  • Automatic data download via Bluetooth or USB options
  • Flexible powering options, including wireless charging
  • Languages supported: English, Français, Italiano, Português, Español


  • Environmental noise
  • City noise
  • Environmental impact studies
  • Construction noise
  • Monitoring noisy venues

Noise Monitoring at Your Fingertips

The SoundExpert Model 821ENV 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. SoundExpert Noise Monitoring System Model NMS048 is available as a complete outdoor noise monitoring kit.

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

Key Specifications for SoundExpert Model 821ENV

Dynamic Range (A-weighted typical):  17 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