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!
Back in the 1880âs, the first headphones (or at least their early ancestors) were used by telephone operators. It was a single earpiece that rested on the userâs shoulder and weighed over 10 pounds (kinda like placing a boombox on your shoulder).