Lorenzolxb4661 Lorenzolxb4661

11-01-2020
Physics

contestada

The sound intensity level 5.0 m from a point source is 95 dB. At what distance will it be 75 dB?

Respuesta :

Manetho Manetho

11-01-2020

Answer:

47.86 or 50 m

Explanation:

Source = 95 + (20log(5) + 10log(4pi)) = 119.96 dB

75 - 119.96 + 10log(4pi) = -33.61

-33.61/-20 = log(distance)

10^1.68 = distance = 47.86m

47.86 or 50 m is the correct ans

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