Two In-Phase Loudspeakers Are Some Distance Apart

question 32

Multiple Choice

Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers, along the line joining them, at a constant speed of 2.8 m/s. What beat frequency do you observe? The speed of sound in the room is 330 m/s.

• A) 13 Hz
• B) 431 Hz
• C) 26 Hz
• D) 4.7 Hz
• E) 118 Hz

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Definitions:

Trespass to Personal Property

An intentional interference with someone's personal property without the owner's consent.

Conversion

An unauthorized act that deprives an owner of personal property without their consent.

Trespass to Land

An unauthorized intrusion by a person onto land that is possessed by another, constituting a private nuisance or offense.

Airspace

The space above the earth's surface that is available for aircraft to fly in, which is regulated by both national and international laws.