Ear trumpet

Ear trumpets, formerly called Hörmaschinen or sound beam stop, are tubular or funnel-shaped devices that collect sound waves and to guide in the external auditory canal of the human ear. This resulted in a strengthening of the incident on the eardrum sound energy and thus a better hearing at reduced or nachlassendem hearing could be achieved. Ear trumpets were constructed of sheet iron, silver, wood, snail shells or animal horns.

History

1624 makes the Jesuit Leurechon under the pseudonym H. van Etten for the first time the principle of Hörrohrs in a printed work known. Athanasius Kircher, who in addition to numerous other fields of knowledge concerned with the study of sound and 1650 in his Musurgia the invention of a " Hörmaschine " described, however, regarded as the true inventor of the Hörrohrs. , But it must have been much earlier have given ear trumpets, even if no image the Roman physician Archigenes is obtained therefrom. (2nd century) mentioned an ear trumpet as a remedy for hearing loss, as well as the Greek physician Alexander of Tralles ( 5th century). a medieval miniature from the 12th century, now in the National Library of France is found, shows King Arthur with a stethoscope while hunting. 1706 used Duguet in the armrests on a armchairs built tubes for receiving sound waves. , this arrangement found multiple imitations. 1879 constructed Rhodes in Chicago from natural shells "Audio Phone" called Hörfächer, with those transmission of sound vibrations via bone conduction was performed by the subjects against the teeth or between the teeth was held. 1812-1814 produced Johann Nepomuk Mälzel to ear trumpets for Ludwig van Beethoven, which are now exhibited in the Beethoven Museum in Bonn. René Théophile Hyacinthe Laënnec invented in 1816 in France as the stethoscope new stethoscope for heart sounds. The Kirchner & Wilhelm in Asperg near Stuttgart in 1910 offered numerous stethoscope models in the catalog of " Medical Waarenhauses " to. The company FC Rein and Son of London presented the last in 1963 the production of a ear trumpets.