Nofe Taking Guide - Episode 1201 - Par? 1 0 Sound waves are produced by ' Sound waves are , waves Sound frequency: noTes on uses of ultrasonic waves- Sound velociTy: ' v equaTions: A'r sea level, The speed of sound is 340 m/s or mi/h. This is called Ex. Problems: What is The speed of sound a'r room Tempera'rure (22C)? How many seconds will if Take To hear an echo if you yell Toward a mounTain 110 m away on a day when air T is -6.0 C