Like distant thunder but with the beat of a tune. Gargantuan sounds pealed across the western suburbs of Berlin last week. Twenty-five miles away at Siemens-stadt technicians of the German Siemens & Halske electric trust were testing the world's loudest loudspeaker. Its powerful diaphragm can make as much music as a 2,000-piece symphony orchestra, as much noise as 500 lusty German kitchen wenches pounding with wooden spoons on tin dishpans.
"In a short time we shall attach this notable invention to a balloon." said a Siemens & Halske spokesman. "We shall anchor the balloon...
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