Which phenomenon results from the superposition of waves causing the overall wave to increase in amplitude?

Which phenomenon results from the superposition of waves causing the overall wave to increase in amplitude?

• A. Interference
• B. Noise
• C. Echo
• D. Reverberation

Answer: (A)

When waves meet, they superpose by adding their displacements at every point. If their crests align with crests and troughs align with troughs, the amplitudes add up, producing a larger overall wave. This increase in amplitude is a hallmark of constructive interference, a specific outcome within the broader phenomenon of interference. So the situation described—waves combining to yield a bigger amplitude—maps directly to interference. The other terms refer to different acoustic effects: noise is a random mix of waves, an echo is a delayed reflection, and reverberation comes from multiple reflections that keep the sound going.

When waves meet, they superpose by adding their displacements at every point. If their crests align with crests and troughs align with troughs, the amplitudes add up, producing a larger overall wave. This increase in amplitude is a hallmark of constructive interference, a specific outcome within the broader phenomenon of interference. So the situation described—waves combining to yield a bigger amplitude—maps directly to interference. The other terms refer to different acoustic effects: noise is a random mix of waves, an echo is a delayed reflection, and reverberation comes from multiple reflections that keep the sound going.