Question

roger walks into a music store. music from a popular song is playing from speakers mounted along the walls of the store. when roger walks to the middle of the room, he notices that the music suddenly seems louder to his ear. which model from above illustrates the phenomenon roger is encountering? a a b b c c d d

Explanation:

Step1: Understand the Phenomenon

Roger experiences louder music in the middle of the room, which is likely constructive interference of sound waves (waves adding up to increase amplitude, hence loudness). We need to identify the wave model showing constructive interference (waves in phase, resulting in a wave with greater amplitude or more compressed/amplified pattern).

Step2: Analyze the Wave Diagrams

• Option A: Two waves with similar amplitude, not showing a combined wave with increased amplitude.
• Option B: Two waves that seem to combine into a wave with greater amplitude (constructive interference, matching the louder sound due to wave superposition in the middle of the room where waves from speakers interfere constructively).
• Option C: Waves with different frequencies or patterns, not matching constructive interference for loudness increase.
• Option D: One wave with larger amplitude and one smaller, not the typical constructive interference from two similar sources (speakers) in phase at the midpoint.

Answer:

B. B