Two In-Phase Loudspeakers That Emit Sound with the Same Frequency

question 53

Multiple Choice

Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 5.00 m.A person is standing 12.0 m away from the wall,equidistant from the loudspeakers.When the person moves 1.00 m parallel to the wall,she hears no sound (experiences destructive interference) for the first time.What is the frequency of the sound? The speed of sound in air is 343 m/s.

• A)211 Hz
• B)256 Hz
• C)422 Hz
• D)512 Hz
• E)674 Hz

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Definitions:

Hearing

The sensory perception that allows individuals to recognize sound through vibrations interpreted by the brain.

Schizophrenia

A chronic brain disorder characterized by problems with thought, emotions, and behavior, leading to hallucinations, delusions, and disordered thinking.

Chronic Schizophrenia

A long-term, debilitating mental disorder characterized by distortions in thinking, perception, emotions, and behavior.

Schizotypal

A personality disorder characterized by severe social anxiety, thought disorder, paranoid ideation, derealization, transient psychosis, and often unconventional beliefs.