Sunday

November 23, 2014

November 23, 2014

Posted by **Jus** on Wednesday, May 20, 2009 at 3:04pm.

a) The sound intensity at a concert is measured to be 0.9 W/m^2. How loud is the concert?

My answer (that is correct); 119.54 dB

b) At the concert, the person beside you whispers with a loudness of 20 dB. What is the whisper's intensity?

My attempt: (but it is wrong)

20+119.54=10log(I/10^-12)

Then I solved for I, to get T=89

c) On the way home from the concert, your car stereo produces 120 dB of sound. What is its intensity?

I did not get this answer either, but tried to do it like b...

Help on parts b and c please!

**Answer this Question**

**Related Questions**

Math - At a concert, the loudness of sound, L, in decibels, is given by the ...

Maths - Find the number of decibels of sound produced by a jet engine at a ...

Math - Formula given: The decibel (dB) scale for measuring loudness, d, is given...

Grade 12 Math Please help!! - Please can anyone answer this which I have posted ...

Math - On th decibel scale, the loudness of a sound, in decibels, is given by D=...

Algebra 2 - Can someone help me? I'm really confused. The loudness L of a sound ...

Grade 12 Advanced Functions Math - Hello! Can someone please help me out for ...

Maths - Find the number of decibels of sound produced by a jet engine at a ...

algebra 2 - the loudness L of a sound in decibels is given L=10log10R, where R ...

Algebra II - 1. A sound has an intensity of 5.92 „e 1025W/m2.What is the ...