What year was the decibel invented?

Answer 1

Decibel with the abbreviation dB is equal to one-tenth of a bel, after Alexander Graham Bell. It is a measuring system first used in telephony in 1929. It is a logarithmic unit of measurement that expresses the magnitude of a physical quantity, usually power or intensity, relative to a specified or implied reference level. Since it expresses a ratio of two quantities with the same unit, it is a dimensionless unit. The inventor of the SPL meter (sound pressure level meter) was not Alexander Graham Bell, but it were the engineers of Bell Telephone Company, New Jersey

Answer 2

The name decibel (abbrev dB) was created in the 1920s at Bell Telephone labs and named to commemorate their founder A G Bell. It is a logarithmic ratio, based on log 10. The previous name referred to the loss in dB of a length of a standard cable.

Ten dB sounds twice as loud to the average person.

one dB is a just noticeable change in sound level.

We can hear from 0dB up to about 110dB, where the sound is highly disagreeable because of its loudness. By definition, one half of the people can hear sounds quieter than 0dB.

Answer 3

The development of this unit of measurement is associated with a diffuse group of people employed by telephone and communications companies in North America, rather than a single individual. Please see the link.

Answer 4

alexandra agram