The Loudness L of a Sound (Measured in Decibels, DB)

question 174

Short Answer

The loudness L of a sound (measured in decibels, dB) is inversely proportional to the square of the distance d from the source of the sound. A person who is 10 ft from a lawn mower experiences a sound level of 70 dB. How loud is the lawn mower when the person is 50 ft away?

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Definitions:

Coefficient

A numerical or constant factor before and multiplying the variable in an algebraic expression.

System of Equations

A set of two or more equations with the same variables, which are solved simultaneously to find their common solution.

Coefficient

A numerical or constant quantity placed before and multiplying the variable in an algebraic expression.

Mathematical Expression

A combination of numbers, operators, and sometimes variables that represents a mathematical relationship or value.