The Loudness of a Sound (Measured in Decibels DB)

question 201

Multiple Choice

The loudness of a sound (measured in decibels dB) is inversely proportional to the square of the distance from the source of the sound. Suppose a person who is 4 ft from a hair dryer experiences a sound level of 60 dB. How loud is the hair dryer for a person 7 ft away? Round to the nearest tenth.

• A) 0.1 dB
• B) 19.6 dB
• C) 1.2 dB
• D) 70.0 dB
• E) 960.0 dB

---

Definitions:

Trial Court

A court in which cases are heard in the first instance, as opposed to an appellate court.

Binding

A legal agreement or practice that is enforceable in a court of law.

Private Law

Law that involves suits between private individuals or groups.

Private Individuals

Persons not acting in any official capacity or representing any entity or the government, conducting affairs for personal or non-public interests.