Model 820 Technical Reference Manual
Introduction
1-1
C H A P T E R
1
Introduction
Welcome to the Larson Davis Model 820. Your new hand held
Model 820 from Larson Davis is a combination
Type 1
preci-
sion integrating sound level meter and a statistical data logger
that exceeds all worldwide accuracy requirements for the mea-
surement of noise.
The Model 820 measures sound with the ease of operation of a
“point and shoot” sound level meter. The latest advances in
surface mount technology, air condenser microphones, and
internal firmware have been combined in a rugged,
lightweight yet extremely versatile unit.
Many sound level meters in the market can create significant
measurement errors because of their limited dynamic range,
pulse range, and crest factor. The Model 820 does not have
these limitations.
Furthermore, its internal firmware is designed to
accommodate changing regulations and to overcome sound
measurement problems. While the Model 820 is the size of a
dosimeter, it is also a complete environmental noise monitor
offering features which will ensure quality measurements for
many years.
We invite you to read this manual to get the most out of your
new Larson Davis sound level meter.
About This Manual
This manual has 10 chapters and 3 appendices covering the
following topics:
