Parabolic sound reflectors
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These soundreflectors illustrate and explain the secret of ‘whispering galeries’ and the principle of sound reflectors used in large halls and auditoriums. (‘the sound of a watch ticking at the focus of a parabolic reflector can be distincly heard at the focus of a similar mirror some distance away’).The two parabolic, nickeled reflectors are 54cm in diam., they are adjustably mounted on cast-iron tripod supports.
