The Loudness of Sound Decreases as the Distance from the Source

question 44

Multiple Choice

The loudness of sound decreases as the distance from the source increases. Doubling the distance from a sound multiplies the relative intensity of the sound by one-fourth. If the sound of a speaker is recorded at 80 decibels at 4 feet, what is the decibel reading at 8 feet?

• A)20 decibels
• B)46 decibels
• C)68 decibels
• D)74 decibels

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Definitions:

Trichromatic Theory

The theory that color vision is made possible by three types of cones, some of which respond to red light, some to green, and some to blue.

Active Touching

The process of using one’s own touch or motion to explore objects and environment, playing a critical role in sensory perception.

Thalamus

A structure within the brain that acts as a relay station for incoming sensory information, directing it to the appropriate areas in the cortex for processing.