The Loudness of a Sound (Measured in Decibels DB)

question 8

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

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Definitions:

Top-Down Processing

Information processing guided by higher-level mental processes, as when we construct perceptions drawing on our experience and expectations.

Schemas

Cognitive frameworks or concepts that help organize and interpret information based on past experiences and knowledge.

Context Effects

The influence of environmental factors on one's perception, cognition, or behavior.

Perceptual Set

A readiness to perceive a stimulus in a particular way, influenced by expectations, emotions, and cultural background.