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题目材料：

The physicist Wallace Sabine pioneered the scientific study of architectural acoustics when he was asked in 1895 to fix a university lecture hall in which the echo of a speaker's words rendered them unintelligible. He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material. By hanging panels of sound-absorbing felt on the walls, Sabine reduced the echo enough to make the hall usable. And the data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.

The passage suggests that Sabine's work made which of the following possible for the first time?

A.to make a room soundproof
B.to build an auditorium out of sound-absorbing materials
C.to construct an enclosed space in which sound would not echo
D. to design a building to meet predetermined specifications with regard to echo duration
E.to render any large room usable for public lectures and performances

D显示答案

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