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In 1944, the microphone was renamed the AXBT with the addition of a Ticonal magnet to increase sensitivity by 6 decibels. [1] [12] The AXBT weighed approximately 9.25 pounds (4.20 kg). [6] The microphone had a figure-of-eight polar pattern. [2] The aluminium ribbon was less than one micrometre thick. [3]
A bathythermograph. The bathythermograph, or BT, also known as the Mechanical Bathythermograph, or MBT; [1] is a device that holds a temperature sensor and a transducer to detect changes in water temperature versus depth down to a depth of approximately 285 meters (935 feet).
A 1921 photograph of Albert Einstein being given a tour of The New Brunswick Marconi Radio Station in Somerset, New Jersey (then part of RCA) along with RCA officers and leading scientists and engineers in the electrical and radio fields from RCA, General Electric, American Telephone and Telegraph, and Western Electric.
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