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Two people wearing behind-the-neck earmuffs. Thermal earmuffs are worn for protection from the cold. Because the ears extend from the sides of the head to gather sound waves, they have a high skin surface-area-to-volume ratio, and very little muscle tissue, causing them to be one of the first body parts to become uncomfortably cold as temperatures drop.
Hearing aids are used for a variety of pathologies including sensorineural hearing loss, conductive hearing loss, and single-sided deafness. Hearing aid candidacy was traditionally determined by a Doctor of Audiology, or a certified hearing specialist, who will also fit the device based on the nature and degree of the hearing loss being treated.
A bone-anchored hearing aid (BAHA) [2] is a type of hearing aid based on bone conduction. It is primarily suited for people who have conductive hearing losses , unilateral hearing loss , single-sided deafness and people with mixed hearing losses who cannot otherwise wear 'in the ear' or 'behind the ear' hearing aids.
WS Audiology (formerly Sivantos Group and Widex) is a privately-owned manufacturer of hearing aids with headquarters in Denmark and Singapore with roots going back to 1878 and Siemens AG. [1] The current company was created following the 2019 merger of Sivantos Group and Widex . [ 3 ]
1941 – The last full-size catalog was published as the U.S. enters the war years. The company goes on a hiatus through 1946 due to lack of merchandise, personnel, paper, etc. 1948 – Alfred Johnson Smith dies at age 63. 1952 – Johnson Smith Co. publishes a 96-page catalog of 2,800 of its most popular items. Company sales and circulation ...
In an effort to boost catalog distribution, Drs. Foster and Smith offered 100,000 free pet tags to those who joined their mailing list in early 2000. [11] In 2001, Drs. Foster and Smith increased its market share by 20% through the acquisition of Pet Warehouse, a Dayton, Ohio mail-order catalog, in a cash buyout. [ 12 ]
AN-6530 Goggles were produced during World War II as eye protection for United States Army and Navy flight crews. In 1943, the AN-6530 design served as a product modification of the USAAF B-7 goggle produced by Chas Fischer Spring Company of Brooklyn, New York. Contracts for AN-6530 goggles were awarded to Chas Fischer Spring Co. and American ...
Double lens anti-fog ski goggles were invented and patented by Robert Earl "Bob" Smith. [3] [4] [5] Visible Light Transmission (VLT) or S value describes the percentage of light allowed through the lens. [6] Astronomy and meteorology: dark adaptor goggles are used before going outside at night, in order to help the eyes adapt to the dark.
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