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
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.
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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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.
Key Product Specifications
1/1 & 1/3 Octaves
Data Logging 1 s to 1 h
Leq, Lmax, Lmin, Lpeak
Simple to Use
8 GB - 256 GB Storage Options
Touch Screen
Licence-free Software
Atlas App for iPhone or Android
Software Options
Product Accessories
Every product needs flexibility to do whatever you want it to.
Download Datasheet
Hard shell shipping and carrying case
LD-CCS060
CAL200 Field Calibrator
CAL1150
1/4 prepolarised high dB Pressure Microphone
LD-377A12
Preamplifier
PRM821/PRM721
USB charging cable & adapter
LD-CBL242-03
Windscreen for 1/2 in Mic
LD-079A06
USB-C Cable
LD-CBL242-03
Replacement Internal Battery
LD-BAT026
12 V Power Cable Bare End
LD-CBL226-1/2
12 V Power Cable
LD-CBL241-01
USB-C Charger
LD-PSA045
Qi charger pad with USB-C connector
LD-PSA046
8 GB Memory Card
LD-X21-SD-8GB
32 GB Memory Card
LD-X21-SD-32GB
Preamplifier extension cables up to 200 ft. (60 m)
LD-EXC series
Screen Protector
LD-X21-SP
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Guides & Downloads Email SupportFrequently Asked Question's
What is the Spartan 821 Firearm Series used for in the UK?
The Spartan 821 Firearm Series is designed for firearm noise measurement in the UK, providing accurate testing of gunshot noise, suppressors, and ballistic events. It is widely used for shooting range noise testing, defence applications, and acoustic analysis to ensure compliance with regulations and minimise environmental impact.
How does the system measure extremely high gunshot noise levels?
This system is purpose-built for shooting range noise testing, capturing impulse noise levels up to approximately 183 dB using a ¼″ pressure microphone and high-speed sampling.
It accurately measures key metrics such as Lpeak and LCpeak, which are critical for analysing firearm noise and evaluating hearing risk.
What standards are supported for firearm noise measurement in the UK?
The Spartan 821 Firearm Series supports key standards used in firearm noise measurement UK, including EN ISO 17201 for shooting noise and Directive 2003/10/EC for noise exposure.
It also meets IEC 61672 Class 1 requirements, ensuring data is suitable for regulatory compliance and technical reporting.
Can the system be used safely during shooting range noise testing?
Yes, the device is designed for safe operation during shooting range noise testing, with remote control via the Atlas mobile app.
Users can start, stop, and monitor measurements from a safe distance, reducing exposure to hazardous impulse noise that can exceed 180 dB.
What features make the Spartan 821 ideal for firearm noise measurement?
The Spartan 821 Firearm Series combines specialist firearm measurement capabilities with advanced sound level meter features, including a touchscreen interface, up to 40 hours battery life, and USB-C and wireless charging.
It also integrates with G4 reporting software, making it easy to analyse data and produce professional reports for firearm noise measurement and shooting range compliance in the UK.
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