Students used a sound meter to gather data in three similarly-sized rooms of their school. They played a guitar note amplified to the same volume at one end of each room. The sound meter was placed in the center of the room. The students repeated each
test three times.
Trial
Sound (dB
Classroom Library Lobby
55 50 63
1
2
56
49
64
3
55
49
65
Which room had the greatest reflection of sound off the walls?
O A. the lobby, because the smooth walls reflected more sound
B. the library, because the bookshelves reflected the most sound
O c. the classroom, because more sound was reflected by the furniture
O D. the library, because it was designed to carry sound waves away from the walls