Model 831 Technical Reference Manual Introduction 1-1 C H A P T E R Introduction Welcome to the Larson Davis Model 831. This versatile instrument, with graphic display, performs the functions of several instruments. It puts the combined features of a precision sound level meter and a real-time frequency analyzer in the palm of your hand. About This Manual This manual has 27 chapters and 4 appendices covering the following topics: Chapters • Chapter 1 - Introduction: Orients the user to the contents of this user manual and the Model 831 features, functions and measurement capabilities. • Chapter 2 - First Use: Describes the process of unpacking the Model 831 and preparing for first use. • Chapter 3 - Overview: A brief discussion of the displayed views, the keypad and navigation through the various functions of the Model 831. • Chapter 4 - Basic Measurement Setup: A detailed description of setting up the Model 831 for the measurement of basic sound level parameters. Includes a description of the Setup Manager. • Chapter 5 - Basic Data Display: A detailed look at the various metrics and information presented on these screens during and following a basic sound level measurement. • Chapter 6 - Run Control: The Model 831 provides a number of run modes to control the time duration of a measurement. The most simple are Manual Stop, Timed Stop and Stop when Stable. More advanced are the Continuous, Single Block Time and Daily Timer modes which are available when the…Open full document
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This is the hardware used for each of the 24 permanent noise monitors around Sea-Tac Airport. The significance for us ‘civilans’ is that it uses open-source standards for storing data. Which means that the public can (and should) have access to its recordings. That would enable us to audit the reports we get from the Port Of Seattle as to the number of flights, decibel levels, etc.