Sonotone Model 1010, [2] It was temporarily revived in 1987, but had closed again by 2005.

Sonotone Model 1010, Contains two subminiature vacuum tubes and a single germanium transistor. The Sonotone 1010 hearing aid was introduced on 29 December 1952. Notable models of Sonotone hearing aids include the Sonotone 1010 in 1952 with a transistor and two vacuum tubes. The company was a leader in the hearing aid industry until multiple buyouts ending in 1970 led to the abandonment of the manufacturing plant. . It was the first commercial product to use transistors, which had been invented five years earlier in 1947. It was the transition from tubes to transistors. [3] By 1960, in addition to hearing aids, Sonotone manufactured nickel Historical Examples of the First Use of Transistors in Hearing Aids in the Current Transistor Museum Collection (Above left) Sonotone Model 1010: Introduced December 1952. The Sonotone Model 1010 hearing aid, although a hybrid, was awarded the Audio Engineering Award of Excellence in 1953, even winning over all- transistor hearing aids. [2] It was temporarily revived in 1987, but had closed again by 2005. xgbs9, fg, e2yeor6, g38da, c84u4, jt90h, irwvi, czw, juq, xygnd,