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The loudness of a jackhammer is 96dB. Its sound intensity is about...

A) 1 watt/m^2
B) 10^-10 watts/m^2
C) 10^-8 watts/m^2
D) 10^10 watts/m^2

1 Answer

5 votes

Final answer:

The sound intensity of a 96 dB sound is typically around 10^-2 W/m^2. However, this answer is not among the provided options, which likely indicates a discrepancy in the question or answer choices.

Step-by-step explanation:

The loudness of a sound in decibels (dB) can be converted to its sound intensity in watts per meter squared (W/m2) using a reference intensity level. The reference intensity level (I0) for human hearing is 10-12 W/m2, which is equivalent to 0 dB. To find the sound intensity that corresponds to 96 dB, we employ the formula:

Intensity (I) = I0 × 10(ß/10)

where ß is the sound level in dB, and I0 is 10-12 W/m2. Plugging in 96 dB, we get:

I = 10-12 W/m2 × 10(96/10)

I = 10-12 W/m2 × 109.6

Which gives us:

I ≈ 10-2.4 W/m2

After evaluating 10-2.4, we find that it approximates to 10-2 or 0.01 W/m2. However, none of the given options A, B, C, or D match this calculation, suggesting there might be a mistake in the question or the given options. Typically, a sound intensity of 96dB is closer to 10-2 W/m2, which is none of the options provided in the question.

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