|
Edgar Marion Villchur (28 May 1917 – 17 October 2011) was an American inventor, educator, and writer widely known for his 1954 invention of the acoustic suspension loudspeaker which revolutionized the field of high-fidelity equipment. A speaker Villchur developed, the AR-3, is exhibited at the The Smithsonian Institution's Information Age Exhibit in Washington, DC. Villchur's speaker systems provided improved bass response while reducing the speaker's cabinet size. Acoustic Research, Inc. (AR), of which he was president from 1954 to 1967, manufactured high-fidelity loudspeakers, turntables, and other stereo components of his design, and demonstrated their quality through "live vs. recorded" concerts. The company's market share grew to 32 percent by 1966. After leaving AR, Villchur researched hearing aid technology, developing the multichannel compression hearing aid, which became the industry standard for hearing aids. == Education, World War II, and early careers == Edgar Villchur received his bachelor's and master's degrees in art history from City College in New York City. He worked in the theater, and had plans to be a scenic designer. World War II changed those plans, and he was trained by the US Army in maintenance and repair of radios, radar, and other equipment. He was stationed in New Guinea, where he rose to the rank of captain and was in charge of the electronic equipment for his squadron. After the war, Villchur opened a shop in New York's Greenwich Village where he repaired radios and built custom home high fidelity sets. He continued to educate himself in the area of audio engineering, taking courses in mathematics and engineering at New York University. After submitting an article to Audio Engineering magazine (later renamed Audio), he was asked to write a regular column. Despite the fact that his Masters Degree was in Art History, Villchur applied for a teaching job at NYU in the mid-fifties, presenting the administration with an outline of a course in Reproduction of Sound. His proposal was accepted, and he taught that course at night for several years. This was the first time such a course had been offered anywhere. At the same time, he worked at the American Foundation for the Blind in Manhattan, organizing their laboratory and designing or redesigning devices to make it easier for blind people to live independently. The tone arm on the turntable made by the Foundation had 12% distortion. Villchur redesigned it so that the distortion was less than 4%. One of his inventions for the Foundation for the Blind was a turntable tone arm that descended slowly to the surface of a vinyl record. This prevented the possibility that a blind person might drop the arm accidentally and that the sudden fall might damage the stylus or the record. In later years, when he was designing the AR turntable, he added this same feature to the tone arm. In the ads describing the advantages of the product, the photo showed a person accidentally dropping the tone arm, with a caption noting that this turntable was "For butterfingers." 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Edgar Villchur」の詳細全文を読む スポンサード リンク
|