Search the 1919 entries in the database!
Artefacts

Bryant’s Phonographic Acoumeter

Bryant’s Phonographic Acoumeter

Maker:
William Sohier Bryant

 

Bryant’s phonographic acoumeter (in soundproof box for restriction of volume to tubes). The main valve is C, the malingerer’s valve is rotating unit D.

© 2015 – 2024 Humboldt-Universität zu Berlin