A Sound Meter Placed 5

question 50

Multiple Choice

A sound meter placed 5.0 m away from a speaker registers a sound level of 60 dB.If the volume on the speaker is turned down so that the power is reduced by a factor of 40,what will the sound meter now read?

• A)1.5 dB
• B)7.5 dB
• C)15 dB
• D)44 dB
• E)56 dB

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Definitions:

Variance

A statistical measure that represents the dispersion or spread of data points in a data set.

Central Limit Theorem

A statistical theory that states that the distribution of sample means approximates a normal distribution as the sample size becomes larger.

Population Proportion

The proportion or percentage of a specific characteristic within the entire population.