Special horn to amplify the sounds adaptable to the radio, cinema, sound, public phonographic auditions and in general to all applications derived from the radio or radiophonograph. (Machine-translation by Google Translate, not legally binding)

摘要

A new special horn to amplify the sounds, adaptable to the radio, sound film, phonographic public auditions, and, in general, to all the applications derived from the radio or radiophonograph characterized in the curve that describes in all its development as seen in the drawing. (Machine-translation by Google Translate, not legally binding)