Spartan™ 821 Firearm Series

When conducting noise assessments at extreme levels, such as 183 dB, the risk of permanent hearing loss is real. It is essential to operate the sound level meter from a...

Key Product Features

Model: LD-821IH-QPR

Class 1 - BS EN 61672-1:2013

USB-C & Wireless Charging

Up to 40 Hours Battery

Measure up to 183 dB

High Peak Capacity

48 kHz Sampling Rate

LCpeak Measurements

¼” Prepolarized Pressure Microphone

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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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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Automatic Calibration

Experience hassle-free calibration with the fully automated system. Simply insert the microphone, and the meter takes care of the rest, adjusting, calibrating, and logging each calibration interval. Stay confident with a complete calibration history, effortlessly maintained for you.

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Effortless Operation – Here’s Why!

Effortlessly navigate with the intuitive colour touchscreen – preloaded with essential features and zero complicated settings. A crisp, responsive display with USB-C & wireless charging. A true smartphone like device.

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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

High-Peak Impulse Noise Measurement

You can instantly generate reports that include the Peak, Max SPL, and background levels, which are essential for showing the perceptible reduction offered by suppressors for G4 software.

High-Intensity Capability

Equipped with a high-pressure 1/4" microphone capable of capturing peaks up to 183 dB, the Larson Davis 821 Firearm series is purpose-built to handle the extreme rise times of muzzle blasts without clipping or distortion.

Whether you are conducting occupational health surveys at a shooting range or verifying suppressor performance, this system provides the transient response and high-speed sampling necessary to ensure compliance with EN ISO 17201 & Directive 2003/10/EC.

Stay Compliant

It provides simultaneous LCpeak and LAeq measurements, allowing you to assess both the immediate risk of acoustic trauma and the cumulative daily exposure LEP,d for range officers or instructors.

It is designed to compare suppressed vs. unsuppressed shots automatically. This is vital if you are consulting for police forces or shooting ranges looking to justify the use of moderators/silencers for noise abatement.