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Beschrijving Edit

Om de vijand te demoraliseren werd de duikvlucht begeleid met een sirene waarvan het geluid door het aanzwellen en oplopen van de toonhoogte (sinuslengte geluidsgolf) als zeer beangstigend (psychologie)werd ervaren.

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current12:40, January 6, 2014Thumbnail for version as of 12:40, January 6, 201401:58480 × 269 (13 KB)Fritz-Kempf (wall | contribs)created video


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