technologia: Alexander Graham Bell

Evidence: 100 • authority: 72

Alexander Graham Bell ( ; born Alexander Bell; March 3, 1847 – August 2, 1922) was a Scottish-born Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885. Bell's father, grandfather, and brother had all been associated with work on elocution and speech, and both his mother and wife were deaf, profoundly influencing Bell's life's work. His research on hearing and speech further led him to experiment with hearing devices, which eventually culminated in his being awarded the first U.S. patent for the telephone, on March 7, 1876. Bell considered his invention…

Evidence: 62 • authority: 72

Mabel Gardiner Hubbard Bell (November 25, 1857 – January 3, 1923) was an American businesswoman, and the daughter of Boston lawyer Gardiner Green Hubbard. She was the wife of Alexander Graham Bell, inventor of the first practical telephone. From the time of Mabel's courtship with Graham Bell in 1873, until his death in 1922, Mabel became and remained the most significant influence in his life. Folklore held that Bell undertook telecommunication experiments in an attempt to restore her hearing which had been destroyed by disease close to her fifth birthday, leaving her completely deaf for the remainder of her life.

Evidence: 56 • authority: 72

The Volta Laboratory (also known as the Alexander Graham Bell Laboratory, the Bell Carriage House and the Bell Laboratory) and the Volta Bureau were created in Georgetown neighborhood of Washington, D.C., by Alexander Graham Bell. The Volta Laboratory was founded in 1880–1881 with Charles Sumner Tainter and Bell's cousin, Chichester Bell, for the research and development of telecommunication, phonograph and other technologies. Using funds generated by the Volta Laboratory, Bell later founded the Volta Bureau in 1887 "for the increase and diffusion of knowledge relating to the deaf", and merged with the American Association for the Promotion and Teaching of Speech to the Deaf (AAPTSD) in 190…

Evidence: 45 • authority: 92

Development of Measures for d/Deaf and Hard of Hearing Stigma: Introduction to the Special Supplement on Stigma Measurement Tools.. People who are d/Deaf or hard of hearing (d/DHH) often experience stigma and discrimination in their daily lives. Qualitative research describing their lived experiences has provided useful, in-depth insights into the pervasiveness of stigma. Quantitative measures could facilitate further investigation of the scope of this phenomenon. Thus, under the auspices of the Lancet Commission on Hearing Loss, we developed and preliminarily validated survey measures of different types of stigma related to d/Deafness and hearing loss in the United States (a high-income co…

Evidence: 43 • authority: 80

Alexander Graham Bell Association for the Deaf and Hard of Hearing

Evidence: 43 • authority: 80

Alexander Graham Bell Association for the Deaf and Hard of Hearing

Evidence: 43 • authority: 92

The historical demography of the Martha's Vineyard signing community.. The deaf population of Martha's Vineyard has fascinated scholars for more than a century since Alexander Graham Bell's research on the frequent occurrence of deafness there and since Groce's book on the island's signing community (Groce, N. E. (1985). Everyone here spoke sign language: Hereditary deafness on Martha's Vineyard. Cambridge, MA: Harvard University Press.). In Groce's work, and in that of subsequent scholars, the Vineyard signing community has often been portrayed as remote and outlying, having developed independently of mainland signing communities for roughly 133 years until 1825. We re-examine that interpr…

Evidence: 43 • authority: 72

Alexander Graham Bell (March 3, 1847 – August 2, 1922) was an inventor, scientist, and engineer who received numerous honors and tributes during his life, and new awards were subsequently named for him posthumously.

Evidence: 43 • authority: 72

The Elisha Gray and Alexander Graham Bell controversy concerns the question of whether Elisha Gray and Alexander Graham Bell invented the telephone independently. This issue is narrower than the question of who deserves credit for inventing the telephone, for which there are several claimants. At issue are roles of each inventor's lawyers, the filing of patent documents, and allegations of theft.

Evidence: 37 • authority: 80

Bell, Alexander Graham, (3 March 1847–2 Aug. 1922)

Evidence: — • authority: 72

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 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" con…

Evidence: — • authority: 72

A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers such as personal sound amplification products (PSAPs) or other plain sound reinforcing systems cannot be sold as "hearing aids". Early devices, such as ear trumpets or ear horns, were passive amplification cones designed to gather sound energy and direct it into the ear canal. Modern devices are computerised electroacoustic systems that transform environmental sound to make it audible, according to audiometrical and cognitive rules. Modern devices also…