A Sound Source Emits 20

question 23

Multiple Choice

A sound source emits 20.0 W of acoustical power spread equally in all directions.The threshold of hearing is 1.0 × 10^-12 W/m².What is the sound intensity level 30.0 m from the source?

• A)92.5 dB
• B)81.5 dB
• C)1.77 × 10^-3 dB
• D)1.77 × 10^-3 W
• E)-27.5 dB

---

Definitions:

Psychological Process

The mental mechanisms and operations that underlie an individual's cognitive functions and behavior.

Reactive Devaluation

The tendency to view a proposal or offer as less desirable simply because it originated from an adversary or opposing party.

Concession

An adjustment or compromise made by one party in a negotiation, often to meet the other party halfway.

Disliked Other

An individual who is viewed unfavorably or negatively by someone.