The Sound Level at 1

question 7

Multiple Choice

The sound level at 1.0 m from a certain talking person talking is 60 dB.You are surrounded by five such people,all 1.0 m from you and all talking equally loud at the same time.The threshold of hearing is 1.0 × 10^-12 W/m².What sound level are you being exposed to? You can neglect any absorption,reflection,or interference of the sound.The threshold of hearing is 1.0 × 10^-12 W/m².

• A)300 dB
• B)60 dB
• C)74 dB
• D)67 dB
• E)81 dB

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Definitions:

Charles Guiteau

An American lawyer who assassinated President James A. Garfield in 1881.

James Garfield

The 20th President of the United States, serving in 1881 until his assassination later that same year.

Assassinate

To murder someone, particularly a notable individual, for political or religious reasons.

Democrats

Members of the Democratic Party, one of the two major political parties in the United States, generally associated with liberal and progressive policies.