Suggesting a way to abolish the nerve-racking honking of street traffie, a "silent horn" for motor cars. produced by a German inventor, emits a tono too kigli-pitclied for the human ear to liear. On anotlier ear, a microphone picks up the inaudible sound and a gentle, melodious lium is heard from a loud speaker beside the driver's ear. If all ears were equipped with this signalling and receiving apparatus, the inventor points out, an ordinary hora would be sounded only to warn pedeetrians. His idea has already been tested experimentally on motor trucks, for which it presents a partieular advan-i tage, since a truck driver often cannot liear tlie honldng of a car right behind him because it is drowned, out by the nolse o£ his own maehine.
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https://paperspast.natlib.govt.nz/newspapers/HBHETR19370930.2.56
Bibliographic details
Hawke's Bay Herald-Tribune, Volume 81, Issue 6, 30 September 1937, Page 5
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128Untitled Hawke's Bay Herald-Tribune, Volume 81, Issue 6, 30 September 1937, Page 5
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