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We are presenting a new and inexpensive audiometer designed to replace the more costly ones which at present dominate the field of otology. We feel that this apparatus, because of its sturdiness, simplicity, dependability of operating, and last but not least, low cost, is an instrument worth bringing to the attention of otologists.
The development of the instrument was encouraged by Professor Gleason of Philadelphia. It is manufactured by the Brenco Electric Company of Philadelphia, and is designated by them as model 34B. It is made up in a leather carrying case and is small and compact, its total carrying weight being only 15 pounds (6.8 Kg.); it is always available, therefore, for ready transportation. It operates on a standard 110-120 volt A.C. current, but can be employed with a transformer on D.C. current as well. Thus, it is ready for operation on merely plugging it into the house socket,
ERSNER MS, GLEASON EB, COATES GM, MYERS D. A LOW-COST PORTABLE AUDIOMETER. Arch Otolaryngol. 1935;21(3):335–338. doi:10.1001/archotol.1935.00640020345009