Bose headphones are American brands, which were founded in 1964. They are famous for their high-quality audio technology and excellent noise elimination technology, and their earphone products are very popular in the market. As a noise-canceling earphone, its noise-canceling ability must be in the first place. BoseQC noise-canceling earphone Ultra has the world-class noise-canceling ability and is the quietest one of all Bose headphones so far.