Larson Davis SoundExpert 721 & 821
Want a sound level meter that works like your phone? The SoundExpert Model 821 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 821 is an excellent choice for ease of use and low power operation.
Request Pricing| Features | |
|---|---|
| Highlights | 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 | |
| Class 1 and Class 2 models available | |
| Octave Band Analysis, Sound Recording, and NC/RC options available | |
| Languages supported: English, Français, Italiano, Português, Español | |
| Applications | 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 and NC/RC ratings for measuring background noise 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 821 together with Larson Davis quality and customer support delivers a professional solution you can trust.
| Specifications for 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 |
Available Configurations
SoundExpert Sound Level Meter is available as a Class 1 or Class 2 device and with or without Octave Band Analysis and other optional features.
= Included = Optional
| SoundExpert Sound Level Meters | ||||
|---|---|---|---|---|
| Model | 721ENV | 721ENV-D | 821ENV | 821ENV-D |
| Class | 2 | 2 | 1 | 1 |
| Time History Logging | ||||
| Measurement History | ||||
| Community Noise Metrics | ||||
| OBA (1/1 and 1/3 Bands) | ||||
| NC/RC Ratings | ||||
| Sound Recording | ||||
| Standards and Approvals for Series 821ENV | |
|---|---|
| Acoustic | ANSI S1.4-2014 Class 1 IEC 61672-1:2013 Class 1 |
| Noise Dosimetry (Optional) | ANSI S1.25-1991 IEC 61252:2017 |
| Safety | Directive 2014/35/EU IEC 61010-1:2010 RoHS Directive 2011/65/EU |
| Approvals | CE, RoHS, WEEE |
See the configuration guide for all accessories.
| Training Partner |
|---|
 |
| Downloads |
|---|
| SoundExpert 721/821 Data Sheet |
| SoundExpert 721/821 Manual |
| Related Pages |
|---|
| Training Videos |
| Sound Meter Selection Guide |
| Noise Monitor Selection Guide |
| Links |
|---|
| Larson Davis Page |
| G4 Ld Utility Software |