The Intensity Level of Sound 20 M from a Jet

question 40

Multiple Choice

The intensity level of sound 20 m from a jet airliner is 120 dB.At what distance from the airplane will the sound intensity level be a tolerable 100 dB? (Assume spherical spreading of sound. )

• A)90 m
• B)120 m
• C)150 m
• D)200 m

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Definitions:

Variance Standard

A method used in budgeting and accounting to analyze the difference between planned financial outcomes and actual results.

Quantity Standard

A predetermined benchmark of the amount of input that should be used in the production of goods or services.

Quantity Variance

The difference between the actual quantity of material used in production and the standard quantity expected to be used.

Direct Materials

Raw materials that can be directly associated with the production of a product and are an integral part of the finished product.