Noun. (plural decibels). 1  A common measure of sound intensity that is one tenth of a bel on the logarithmic intensity scale. 2  It is defined as dB = 10 * log 10 (P 1 /P 2), where P 1 and P 2 are the relative powers of the sound.oun. (plural decibels). 1  A common measure of sound intensity that is one tenth of a bel on the logarithmic intensity scale. 2  It is defined as dB = 10 * log 10 (P 1 /P 2), where P 1 and P 2 are the relative powers of the sound.
The Suez Crisis, 1956. On July 26, 1956, Egyptian President Gamal Abdel Nasser announced the nationalization of the Suez Canal Company, the joint British-French enterprise which had owned and operated the Suez Canal since its construction in 1869.
The Erie Canal helped New York become the financial capital of the world and created a cheap and easy way to the west. Historians believe that the Civil War may have ended differently if there was no Erie Canal. The opening of the Erie Canal enabled trade between the East and the West, which helped the Midwestern farmers prosper. This encouraged Northerners to move to the Midwest.