SoundExpert® – Sound Level Meter

Portable sound level meter designed for accurate acoustic measurement in various environments, including industrial and environmental settings. Known for its ease of use and durability, it features Class 1 precision,...

Key Product Features

Model: 821

Class 1

Touch Screen

2 Year Device Warranty

5 Year Microphone Warranty

Up to 40 Hours

Time & Measuremnt History

Wireless Charging & USB-C

Back-Erase

Audio Recording

Wireless Connectivity

Environmental Logger

Smartphone App Control & Reporting

Community Noise Metrics LDEN, LDN

Dosimeter Mode

NR NC RC Room Acoustics

G4 Free Reporting Software

Dosimetry Mode: Effortless Noise Monitoring

Easily assess workplace noise exposure with Larson Davis dosimeters. The intuitive Dosimetry Mode simplifies data collection, allowing you to monitor, log, and report employee noise levels with precision. Designed for quick setup and reliable results, it ensures compliance with occupational noise standards while keeping workers protected.

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Dosimetry Mode: Effortless Noise Monitoring

Power That Lasts: The SoundExpert's Long-Life Battery

Room acoustics refers to how sound behaves within an enclosed space. It involves analysing how sound waves reflect, absorb, diffuse, and transmit within a room. The primary focus is to assess how sound interacts with surfaces (walls, ceilings, floors) and objects in the space to ensure optimal auditory experiences, reduce noise, and prevent echo or reverberation.

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Power That Lasts: The SoundExpert's Long-Life Battery

Visual Convenience: Accurate Identification

Obtain real-time 1/1 and 1/3 octave band data, allowing you to isolate and identify specific noise frequencies for targeted mitigation strategies.

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Visual Convenience: Accurate Identification

Feature Rich Settings. & Sound Recording

Adjust your settings to suit your measurement with frequency weighting and time history settings. Crystal-clear recordings can be triggered by exceedance levels, external controls, or a preset trigger, while the pre-trigger function allows you to capture the moments leading up to a noise breach for precise analysis.

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Feature Rich Settings. & Sound Recording

Fully Customisable Event Triggers

Leveraging the instrument’s expansive dynamic range and 32-bit audio capability, the system captures high-resolution, distortion-free audio, even during intense noise events. The session logs details the events & audio recordings by the meter.

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G4 Utility Reporting Software

The G4 LD Utility is free software for all compatible Larson Davis meters, enabling you to connect, control, and view data from your device.

Organise files by project, view data in graphs or spreadsheets, and export reports.

Analyse multiple parameters, visualise heat maps, and, for meters with sound recording, play synchronised audio and edit data directly from the graph.

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Atlas™ – Mobile App

Your smartphone can now become the keypad and display for the SoundExpert via Bluetooth.

Manage instrument setups
Run and stop measurements
View data except 1/1 and 1/3 octave data
Manage Wi-Fi connections
Calibrate and check calibration
View files
Schedule measurements

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Experience Precision with the Larson Davis SoundExpert

Its user-friendly interface and sharp, high-resolution display deliver instant clarity and effortless navigation, saving you valuable time in the field. The lightweight design and comfortable hand grips allow for easy, single-handed operation, making quick measurements a snap.

G4 Software

Atlas Smartphone App: Control, Manage, Report

Easily manage instrument setups, start and stop measurements, view collected data, manage Wi-Fi connections, perform calibration checks, browse stored files, and schedule measurements, all from one platform.

LD Atlas™ – Mobile App