Science: Loudest

A giant loudspeaker stood on the roof of a hangar at Mineola, L. I., last week, and radio and sound engineers trooped out to have a look, listen to its monstrous bray. Developed in the Bell Telephone Laboratories, the apparatus resembled a big searchlight. When it and 18 others like it are mounted soon atop a 100-ft. tower, their combined blast will be the loudest sound ever produced by man.

The amplifier assembly will serve Roosevelt Raceway, a pretzel-shaped automobile track on the site of Roosevelt Airport No. 1. From the glass-enclosed...

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