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- Last added
- 2023-10-18
Featured Washington State DOT manuals
Washington State DOT Construction Noise Impact Assessment User Manual
This manual provides methods for evaluating construction noise effects on species and ecosystems. It covers airborne and underwater noise, attenuation, and species-specific thresholds. It includes tables and figures for noise levels, equipment, and habitat impacts.
The document is intended for project biologists to define action areas and assess noise-related disturbances during construction projects, especially those involving pile driving, geotechnical work, and marine activities.
Covers: Terrestrial Noise · Underwater Noise · Noise Generation, Transmission, and Reduction · Baseline Underwater Sound Conditions · Species and Noise · Tables of Noise Levels and Thresholds
Latest Washington State DOT manuals
Washington State DOT Construction Noise Impact Assessment User Manual
User Manual 95 pages · 2.1 MB · ENA technical guide for assessing construction noise impacts on wildlife and environments in Washington State.
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Questions answered in Washington State DOT manuals
What are the two most common types of in-air noise based on attenuation dynamics?
The two most common types are point source and line source noise.
From: Washington State DOT Construction Noise Impact Assessment User Manual
How is underwater noise measured?
Underwater noise is measured with a hydrophone, which converts sound pressure to voltage, expressed in Pascals (Pa), pounds per square inch (psi), or decibels (dB).
From: Washington State DOT Construction Noise Impact Assessment User Manual