Which of the following expression is correct with respect to sound pressure?

Q. Which of the following expression is correct with respect to sound pressure?

A.            Sound pressure = Total atmospheric pressure – Barometric pressure

B.            Sound pressure = Total atmospheric pressure + Barometric pressure

C.            Sound pressure = Total atmospheric pressure x Barometric pressure

D.            Sound pressure = Total atmospheric pressure/Barometric pressure

Answer: Sound pressure = Total atmospheric pressure – Barometric pressure