The repetition of a sound resulting from reflection of the sound waves.
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Pneumatic and Electro-pneumatic Actions-TubularPneumatics-Divisionof Organs- Sound Reflection-Octave Couplers and Extensions
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Most are rooms within rooms, lined on all six sides with soundproof fiberglass wedges to kill sound reflections.
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What the Vicomte thought and felt at that moment, when that long-limbed Englishman treated him with such marked insolence, might fill volumes of sound reflections.