Professional Noise Measurement Instrument

Larson Davis offers a wide range of sound level meters designed to support your specialized application needs. With specialized firmware, software, and apps, find the right solution for your monitoring below.

Model 821

Type 1 Sound Level Meter

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. With a large, responsive touch screen, SoundExpert Model 821 offers A, C, and Z frequency weightings F,S, and I time weightings, community noise metrics, optional Octave Band Analysis, and more in both Class 1 and Class 2 models.

IEC Type 1 – Patent Approved
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
1/1 and 1/3 octave band filter
A, C, and Z frequency weightings
F, S, and I time weightings
Full-featured data logging (100ms logger step)

Model 831C

Type 1 Advance Sound Level Meter

The Larson Davis SoundAdvisor Sound Level Meter performs the functions of several instruments by combining the features of a precision Class 1 sound level meter, environmental noise analyzer, and a real-time frequency analyzer in one unit. From app-based compatibility with LD Atlas™ to instant alert capabilities, SoundAdvisor is an ideal solution for a range of applications including environmental noise assessment, spectral noise analysis, reverberation time measurements, event detection, sound recording, and more.

IEC Type 1 – Patent Approved
1/1, 1/3 octave, FFT analysis, tone assessment, reverberation time analysis
20ms logger step
Built-in cellular, WiFi, and wired networking connectivity
Exceedance based logging, and sound recording
Customizable for your application
Full range AC output for custom analysis

Model 730

Wireless Noise Dosimeter for Worker Noise Exposure Measurements (Occuputional Health and Safety)

The Spartan™ Noise Dosimeter Model 730 is designed to make worker noise dose measurements easy and fast. With Spartan, control test setup and measurements directly from the Larson Davis Atlas™ mobile app. All essential tasks can be completed from your iOS™  or Android™ device.

Compliance to ISO 9612, OSHA, MSHA, ACGIH
EU Directive 2003/10/EC compliance
Full control, live monitoring, auto data download via Bluetooth
Optional Event Sound Recording
Optional 1/1 Octave filters
Motion detection (for validation and excluding unwanted “bumping”)


Precision Sound Level Calibrator – IEC 60942 Class 1

Output level: 94 or 114 dB
 Output frequency: 1 kHz
1/2″ microphone opening
IEC 60942:2003 Class 1 compliant
Output level independent of battery condition

Noise Monitoring Station Add-on

We offer fully customizable options to convert the sound level meter into a weather-proof noise monitoring station, including solar, battery or mains powered options.

Portable Noise Monitoring System

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Long-Term Noise Monitoring System

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