If reference sound pressure P₀ is 2 x 10¯⁵ N/m², a sound pressure of 90 dB is equal to

If reference sound pressure P₀ is 2 x 10¯⁵ N/m², a sound pressur

1.	If reference sound pressure P₀ is 2 x 10¯⁵ N/m², a sound pressure of 90 dB is equal to
A.	0.632 N/m²
B.	0.707 N/m²
C.	0.835 N/m²
D.	0.925 N/m²
Answer» B. 0.707 N/m²