Dr. Emile Berliner, the inventor of the microphone, has perfected a new device, known as a "sound sponge," for killing echoes in buildings of bad .-icoustic properties. The invention consists of paper discs stiffened by cross wires and made into various shapes to suit architectural contour*. These discs are distributed about the walls at intervals aa required.
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Bibliographic details
Auckland Star, Volume LVIII, Issue 136, 11 June 1927, Page 12
Word Count
57Untitled Auckland Star, Volume LVIII, Issue 136, 11 June 1927, Page 12
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