Practice Question: Calculating Noise Dose for Varied Sound Levels and Durations

NCEES Civil PE Specification Health and Safety: Work zone and public safety

Problem

Considering the provided data on permissible noise levels and corresponding permissible times, what is the noise dose (in percentage) for a worker exposed to a noise level of 90 dBA for 5 hours and 85 dBA for 3 hours:

*Values of permissible time corrospending to various noise levels are provided in section " 2.6.2 Work Zone and Public Safety" of Civil PE Reference Handbook V2.0 (page 70).