Two Loudspeakers, a and B, Are Separated by a Distance

question 18

Multiple Choice

Two loudspeakers, A and B, are separated by a distance of 2.0 m.The speakers emit sound waves at a frequency of 680 Hz that are exactly out of phase.The speed of sound is 343 m/s.How far from speaker A along the +x axis will a point of constructive interference occur?

• A)0.25 m
• B)0.30 m
• C)0.46 m
• D)0.88 m
• E)0.98 m

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Definitions:

Extinction

In psychology, the gradual weakening of a conditioned response that results in the behavior decreasing or disappearing.

Generalization

The ability to apply the lessons learned from specific instances to broader, similar situations without being explicitly taught for every situation.

Positive Reinforcement

A process in behavior analysis where the probability of a behavior occurring is increased by following it with the addition of a reinforcing stimulus.

Negative Reinforcement

A behavior modification technique that involves the removal of an unpleasant stimulus to increase the likelihood of a desired response.