Why is the term Roger Wilco considered by some to be an incorrect phrase - trivia question /questions answer / answers
Aerophones; any class of musical instruments in which a vibrating mass of air produces the initial sound including bull roarers and sirens. They are found in many countries throughout Africa and are normally incorporated with dancing, the musicians having to synchronize their footwork along with playing their notes!
Bose headphones. Bose Corporation produces headphones for consumer, aviation and military use. The models range includes in-ear headphones, mobile headsets, supra-aural headphones, circumaural headphones and military/aviation headsets. The company was the first to release active noise cancelling headphones as a consumer product.