A person standing 50 m away from an HEMM experiences 90 dB sound pressure

Q. A person standing 50 m away from an HEMM experiences 90 dB sound pressure level. If the person moves to a new location that is 70 m away from the HEMM, the sound pressure level experienced by the person, in dB, becomes _       

Ans: 86.75-87.25

   

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