Question

select the correct answer
what do we get when two sound waves of slightly different frequencies interfere with each other?
a. resonance
b. beats
c. standing waves
d. first harmonic

Explanation:

To solve this, we analyze each option:

• Option A (resonance): Occurs when a system oscillates at its natural frequency due to external forces, not related to two slightly different frequency waves.
• Option B (beats): Defined as the periodic variation in amplitude (loudness) resulting from the interference of two sound waves with slightly different frequencies. This matches the scenario.
• Option C (standing waves): Form when two identical waves (same frequency, amplitude) travel in opposite directions, not from slightly different frequencies.
• Option D (first harmonic): Refers to the fundamental frequency of a vibrating system, unrelated to interference of two different - frequency waves.

Answer:

B. beats