A phonendoscope is a binaural stethoscope that amplifies sound by means of two parallel resonating plates. The form was introduced by Italian physicians Eugenio Bazzi and Aurelio Bianchi in 1894. An inscription on the cover reads “PHONENDOSCOPE / TRADE MARK REG’D / BAZZI-BIANCHI / BOWLES / PAT’D OCT. 2-94 / PAT’D JAN. 19-97 / ROMA / SOLE AGENTS FOR U.S.A. / G. Pilling & Son, Philadelphia.

This example may have been made by Martin Wallach, a medical and surgical instrument maker with shops in Cassel, Germany, and in Rome, Italy. Wallach applied for a U.S. trademark for the term “PHONENDOSCOPE” in 1897.

Ref: Aurelio Bianchi, The Phonendoscope and Its Practical Applications (Philadelphia, 1898).

Location: Currently not on view

See more items in: Medicine and Science: Medicine


Exhibition Location:

Data Source: National Museum of American History

Id Number: ZZ.RSN83559U20

Object Name: phonendoscopeOther Terms: Medicine

Measurements: overall: 1 7/8 in x 2 7/8 in; 4.7625 cm x 7.3025 cm


Record Id: nmah_737302

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