The hourly average sound level for a community noise is 60 dBA from 7 A.M. to 7 P.M., 55 dBA from 7 P.M. to 10 P.M., and 50 dBA from 10 P.M. to 7 A.M. Find (a) Leg for the 24 hours, (b) Lân, and (c) CNEL.

The hourly average sound level for a community noise is 60 dBA from 7 A.M. to 7 P.M., 55 dBA from 7 P.M. to 10 P.M., and 50 dBA from 10 P.M. to 7 A.M. Find (a) Leg for the 24 hours, (b) Lân, and (c) CNEL.

Residential Construction Academy: House Wiring (MindTap Course List)

4th Edition

ISBN:9781285852225

Author:Gregory W Fletcher

Publisher:Gregory W Fletcher

Chapter18: Device Installation

Section: Chapter Questions

Problem 17RQ

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Concept explainers

Electrical Plans

An electrical plan is also known as an electrical drawing or a wiring diagram. It is a kind of visual representation which bears the blueprint symbols of all the electrical components in electrical house plans or various building construction projects. In other words, electrical plans describe electrical circuits and systems that build up the electrical house plans or building plans. An electrical engineer who works on various construction projects creates an electrical drawing. The engineer outlines the electric planning with different symbols and lines forming a detailed electrical circuit. These drawings are a means of representation for the clients, who will carry out the actual wiring process. In a nutshell, an electrical plan showcases the circuitry with the proper placement of electric components.

Question

The hourly average sound level for a community noise is 60 dBA from 7 A.M. to
7 P.M., 55 dBA from 7 P.M. to 10 P.M., and 50 dBA from 10 P.M. to 7 A.M. Find
(a) Leg for the 24 hours, (b) Lân, and (c) CNEL.

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Step 3: Calculate Ldn

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Step 4: Calculate CNEL

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