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!
Many warning sirens in provinces such as Ontario, Alberta and Saskatchewan are now used as tornado warning instruments. Smithers, British Columbia uses an old air raid siren as a noon-day whistle. One of the warning sirens was even used as a goal horn for the Quebec Nordiques between the mid 1980s and 1991. United States