Volume and pitch, infrasound, ultrasounds 

his time, we will talk about the pitch of the sound, the volume of the sound. You will learn how to play instruments, what is the tone. I will talk about the frequency of sound heard by man, but also ultrasound and infrasound. You will also learn what is the level of sound intensity. I will talk about echolocation and echolocation. I will also mention the speaker transmission band. Knowledge at the same time for homework, a test in physics or a lesson in physics. We will use an oscilloscope and a wave spectrum analyzer. We'll find out why he's scared at home