10-10. Using the typical noise spectrum for automobiles traveling at 50 to 60 km/h, determine the equivalent A-weighted level using sound power level addi- tion in a spreadsheet program you have written. The following band levels were estimated from Figure 10-25. Band center Band level frequency (Hz) (dB) 63 67 125 64 250 58 500 59 1,000 59 2,000 55 4,000 51 8,000 45

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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.