Question

define pitch and rarefaction

Answer 1

⭐ rarefaction are the longitudinal wave. when the particles are along the direction of propagation of the wave it forms rarefaction..
⭐ pitch is that characteristics of sound by which an acute note can be distinguished from a grave or flat note☺☺

Answer 2

Answer:

1. pitch = a characteristic of sound which helps in different in a shrill sound from a flat sound is known as speech