There are one or more microphones built into the headsets to detect external noise. By employing sophisticated electronic signal processing, an anti-noise signal is then generated to cancel out the external noise. In essence, this leaves only the desired music or soundtrack audible to the listener.
â¢ MANCHURIAN (adjective). The adjective MANCHURIAN has 1 sense: 1. of or relating to or characteristic of Manchuria or its people or their culture. Familiarity information: MANCHURIAN used as an adjective is very rare.
Manchukuo - History.  1 Manchuria is a transcription of the Japanese reading of the Chinese word æ»¿æ´² which means Manchuria, which in Japanese is ManshÅ«, which in turn dates from the 19th century. The name Manzhou was invented and given to the Jurchen people by Hong Taiji in 1635 as a new name for their ethnic group.