Antique Barany Box forTesting Unilateral Deafness and malingering 20th Century.

Description

Antique Barany Box Testing Unilateral Deafness and malingering.Invented by Dr.Robert Barany 1876--1936. Contains a clockwork mechanism which produces a buzzing noise.Earpiece is placed in hearing ear.and masking  noise is activated by depressing a button.. The other ear is tested for hearing ability. The German made device is in excellent original working order and dates to the 1st.quarter 20th.century A detailed explanation of the workings of the Barany Box is available on the internet. Diam.2 3/8" The piece is offered as found with no repairs or restorations. Shipping includes tracking and insurance