The Larson Davis Model 831 Technical Reference Manual provides comprehensive guidance for operating a handheld precision sound level meter and real-time frequency analyzer. The manual covers 27 chapters and 4 appendices addressing topics such as measurement setup, noise dose and exposure monitoring, time history logging, calibration, and data storage. It serves as a complete reference for professionals conducting acoustic measurements, including those relevant to environmental noise monitoring near airports.

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This is the introductory chapter of the Larson Davis Model 831 Technical Reference Manual, describing the instrument as a combined precision sound level meter and real-time frequency analyzer. The chapter provides an overview of the manual’s 27 chapters and 4 appendices, covering topics from basic measurement setup to firmware upgrades and technical specifications.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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