During a test, sound level was measured as $90 \mathrm{~dB}$ in the operator's cabin on a tractor. Taking reference sound pressure as $2 \times 10^{-5} \mathrm{~N} \mathrm{~m}^{-2},$ the measured RMS sound pressure in $\mathrm{N} \mathrm{m}^{-2}$ is
(A) 6.32
(B) $6.32 \times 10^{-1}$
(C) $1.8 \times 10^{-3}$
(D) $6.32 \times 10^{-10}$

Question ID - 157277 | SaraNextGen Top Answer

During a test, sound level was measured as $90 \mathrm{~dB}$ in the operator's cabin on a tractor. Taking reference sound pressure as $2 \times 10^{-5} \mathrm{~N} \mathrm{~m}^{-2},$ the measured RMS sound pressure in $\mathrm{N} \mathrm{m}^{-2}$ is
(A) 6.32
(B) $6.32 \times 10^{-1}$
(C) $1.8 \times 10^{-3}$
(D) $6.32 \times 10^{-10}$