Sound is the wave of air molecules caused by the motion of an object. It is the vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear. Sound is a sequence of waves of pressure that propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During propagation, waves can be reflected, refracted, or attenuated by the medium.
Sound is a mechanical wave that is a fluctuation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation moved in organs of hearing by such vibrations
Convert the 25 bel to decibel and neper.
bel = 25
decibel = 250
neper = 28.781947962238082