Barbour County Revenue Commission 303 East Broad Street Eufaula AL 36027 334-687-7639. Clay County Tax Assessors 210 Washington Street Fort Gaines GA 39851 21.9 miles from Eufaula 229-768-2000. Stewart County Assessor's Office PO Box 844 Lumpkin GA 31815 22.9 miles from Eufaula 229-838-6058.
The first hearing aid using a vacuum tube was the âVactuphone,â invented by Hanson in 1920. It was produced by Western Electric Co., a leading producer of hearing aids, and distributed by Globe Phone Co. beginning in October 1921 (13).
The Early Days. 1919 headphones originated from the earpiece, and were the only way to listen to electrical audio signals before amplifiers were developed. The first truely successful set was developed by Nathaniel Baldwin, who made then by hand in his kitchen and sold them to the U.S. Navy. 1937 German company Beyerdynamic invented and produced the first dynamic headphones, the DT-48, which are still in production today.