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16 cars in circle at boom box competition produce 110 dB sound intensity level at the center of the circle_ What is the average sound intensity level (in dB) produc...

Question

16 cars in circle at boom box competition produce 110 dB sound intensity level at the center of the circle_ What is the average sound intensity level (in dB) produced there by each stereo, assuming interference effects can be neglected? 120

16 cars in circle at boom box competition produce 110 dB sound intensity level at the center of the circle_ What is the average sound intensity level (in dB) produced there by each stereo, assuming interference effects can be neglected? 120



Answers

Ten cars in a circle at a boom box competition produce a 120-dB sound intensity level at the center of the circle. What is the average sound intensity level produced there by each stereo, assuming interference effects can be neglected?

Oh, so that's what we're given. The test level produced by the Bend is equal to UNDER 10. Disable At least as of 15 m. You have to find a nice and power output. First of all, you will find the intensity For that purpose we will proceed in test level is equal to 110. Does civil is equal to can love. How do I add vitamins for -12? When you saw this rig it I is equal to transfer minus fan ward. When we test square, you can find power buy in from the I is equal to Power do and by four by our square. How we can see the power is equal to I multiply by four by our spare. Where I am standing for minus one watt per meter square. Multiply by four hours 3.14 When people have a 15 m square. So when we saw this we get maximum power output is equal to 282.6. What? Which is the answer to this question? Thank you forward you

So we can model this function with this formula here, which tells us that, um, at the initial without any echoes, the decibels is 1 28 Both each echo. It decreases by a factor of 2/3. S O X is equal to the echoes. And we want to know where y is going to equal 10 or in the best for level equals 10. Um, and that means that it will take 10. It would take, um, six echoes. Um, it will be heard, but the seventh echo will not be heard by the human ear.

Good day. The topic is about expressing intensity levels in terms of decibel, in terms of testable, we find the intensity level are also called the sound level as 10 times log to the base 10 of I where I is the intensity in what's per meter squared Over 10 to the -12. Suppose we have a machine which sound level is equal to 80 decibels. We wish to find the sound level when there are two machines working. These two machines we say are identical and that are placed in the same location. So we find first, We established 1st formula for The sound level or the intensity level for one machine. So that will be 10 knock off and well to the best end of I Over 10 to the negative and that I suppose I went Which means which means intensity for one machine And this we know is equal to 80 decibels. Now when there are two machines working, it's not that they're less of us will end up rather their intensities. So we say that when there are two machines working, that will be twice the intensity of sun. So we say two times the intensity when there is just one machine. So you sold 40 Sounded well for two machines. So he made us when might want to put They will be one for this. So that's going to be be two of equals 10 Log off the west end of a two Over 10 to the -12. So let's simplify by noting that I do is twice as I went. So that we we tend to the love to the waist and of two, I went over 10 to the negative. Now let us recoil dog property. That says when you have plug off the product of A and B. You can have that as the sum of the logs of A. Andy. And so this becomes me too then so I'm factoring out then here and I can decompose. Yeah To the best kind of two, I Over 10 to the negative to help us block off, knock off To the base 10 plus lock off I over 10 to the negative 12 To the best dug up by one Over 10 to the -12 to the base 10. So not that if you combine this again, you will certainly get Love to the Baseline of two. I won over 10 to the -12. Right? So now we have 10 and we can execute this log to the based end of to the calculator That that gives us 0.13 and recall that this uh term here which are we went first Express in a way that we factor in 10. So factoring then. So that will be 10 times 100.30, that's 10 times throughout. Mhm I went over 10 to the -12 to the base 10. So this went here. Yes, your Sound level or intensity level for one. Type pissed by one Machine rather. So that's equal to 80 decibels. Hence this one is equal to eat you. And so The intensity level for two machines will not be 10 times .30 plus 80 And that's equal to 83 disciples. So for two machines now working The sound level will be equal to 83 does not necessarily twice the development. There is just one, so I hope this helps.

In this problem, we are given the intense level. Office hours is equal to 95 addressable, and we are asked to find intensity of sound Hearing test to develop 195 decibel for that purpose, values from light intensity level is equal to 10 log I contested. Well by intensity of fantastical sound. I know We're just lackadaisical to even 95 decibels is that can love I do inviting power ministers. We consider it i is equal to temperature minus well, multiply by anti log off 9.5. When we saw this, we get intensity of the sound is equal to 3.16 to multiple away 10 Power Ministry. What permitted square? Which is the answer to this question? Thank you for watching video.


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