A Loud Noise (Of Mixed Sounds) Arriving at One Side

question 44

Multiple Choice

A loud noise (of mixed sounds) arriving at one side of the head enters the ipsilateral ear first and is slightly muffled as perceived via the contralateral ear. This is mostly because the

• A) contralateral ear is farther away.
• B) contralateral ear is protected by air pressure.
• C) head absorbs some of the noise energy before it arrives at the contralateral ear.
• D) head prevents much of the noise energy from getting through.
• E) head slows down the speed of sound.

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Definitions:

Gears And Shafts

Mechanical components that transmit rotational force; gears change the speed, torque, and direction of movement, while shafts support rotating parts and transfer motion.

Idler Gear

An Idler Gear is a gear positioned between two other gears to transmit motion from one to the other, often used to change the direction of rotation or to adjust the spacing between driving and driven gears.

Direction Of Rotation

The clockwise or counterclockwise movement of a mechanical component or system as seen from a specific vantage point.

Drive Gear

Any gear that drives another.