![]() ![]() Easy enough, right? However, a logarithmic scale is very different. If you start at zero centimeters and add 10, you’re at 10 centimeters start at 10 centimeters, add 10 more, and you’re at 20 centimeters. Think of a linear scale as a tape measure: going 10 units up the scale gets you 10 units more than where you started. (The Richter scale of earthquake intensity is another example of a logarithmic scale.) We measure sound intensity on a logarithmic base 10 scale, which proceeds in multiples of 10, rather than on a linear scale. Human ears can detect an incredibly wide range of sounds. ![]() You’ve certainly heard the word “decibel” more than once but do you know how the decibel scale works? Understanding the decibel scale will give you insight into the degrees of hearing loss, and help when it comes to hearing protection. Our Hearing Protection Series of blog posts takes an in-depth look at hearing protection. It’s important to protect whatever level of hearing ability you still have. Part 1 in our Hearing Protection Series | See Part 2įor many people with hearing loss, hearing protection is a big deal. A State-by-State Guide for Hearing Aid Insurance.This invent seen public displays of various inventions such as the Telephone, typewriter and new sewing machines etc. ![]() The first public display followed in June at the Centennial Exposition in Philadelphia. Alexander Graham Bell patented his invention in 1876. Mr Watson opened the door and confirmed he heard the message down the transmitter. The following words were spoken by Bell down the mouthpiece: "Mr Watson, Come here. ![]() Bell was in his laboratory while his assistant Thomas Watson waited in Bell’s bedroom with a reed receiver pressed against the wall. Bell had been conducting experiments with his latest telephone transmitter. Bell thought if sound waves could be converted into a fluctuating electric current, that current could then be recovered into sound waves at the other end of the circuit. It was march 1876 when Bell made the first intelligible telephone communications. In 1875, Thomas Sanders and Gardiner Greene Hubbard entered into an agreement to provide financial backing of Bell’s invention. This same year, he met Thomas Watson, who would become his assistant. He experimented with sound and had worked with such devices known as the ‘ Harmonic Telegraph‘ and ‘ Phonautograph‘. In 1874, while conducting acoustics experiments at the Massachusetts Institute of Technology, Bell conceived the idea for a Telephone. It was here he met Boston attorney Gardiner Greene Hubbardand in 1873 met Hubbard’s daughter, Mabel (who was to be his wife).īell had always been fascinated with the idea of transmitting speech. The School then became part of Boston University where Bell was appointed Professor of Vocal Physiology. In 1870, Alexander and his parents immigrated to Brantford, Ontario, Canada. The following year Alexander Graham Bell moved to Boston in the United States and in 1872 he founded the school of Vocal Physiology where he trained teachers of the deaf. Alexander Graham Bell followed in his father’s footsteps to become a teacher of music and elocution and in 1868 began teaching speech to deaf children in London. His father Alexander Melville Bell worked with the deaf, and was the inventor of “ Visible Speech,” a universal alphabet that portrays the sounds made by the human voice as a series of symbols. He was educated in Edinburgh and London and was known to have been an excellent piano player at a young age. He was born on the 3rd March, 1847 in Edinburgh, Scotland. Alexander Graham Bell, Born at 16 Charlotte Square, Edinburgh.Īlexander Graham Bell was an influential Scientist, Engineer and Inventor. ![]()
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