Question

Level of noise from several motorcycle engine designs are measured in dB. We want to know if there is significant difference in noise generated in various designs. There are 4 motorcycle engines and five dB readings are made per engine as shown in table below. Level of Noise (dB) Design 1 2 3 4 5 1 19 20 19 30 8 2 80 61 73 56 80 3 47 26 25 35 50 4 95 46 83 97 97

          Level of noise from several motorcycle engine designs are measured in dB. We want to know if there is significant difference in noise generated in various designs. There are 4 motorcycle engines and five dB readings are made per engine as shown in table below.
Level of Noise (dB)
Design
1
2
3
4
5
1
19
20
19
30
8
2
80
61
73
56
80
3
47
26
25
35
50
4
95
46
83
97
97

Show more…

Level of noise from several motorcycle engine designs are measured in dB. We want to know if there is significant difference in noise generated in various designs. There are 4 motorcycle engines and five dB readings are made per engine as shown in table below.
Level of Noise (dB)
Design
1
2
3
4
5
1
19
20
19
30
8
2
80
61
73
56
80
3
47
26
25
35
50
4
95
46
83
97
97

Added by Vicenta M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Thanks for your feedback!

And five dB readings are made per engine as shown in the table below. The level of Noise (dB) Design 1 2 3 4 5 1 20 19 30 8 2 80 61 73 56 80 47 26 25 35 50 3 4 95 46 83

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00:01 So, let us start with the concept which we are going to use here for this question.

00:06 So, since we know that the power gain in a decibel, this can be given by the formula 10 to the power whatever will be the decibels powers we have been given divided by 10.

00:23 So, basically for we have been given the table and we have to complete the missing entries in that table.

00:30 So, for the first reading the power gain this should be equals to 10 to the power the decibel by 10 that will be equals to 10 to the power.

00:42 So, decibel we have been given 1 db that whole divided by 10 this will comes to 10 to the power 0 .1 and hence approximately it is equals to 1 .26.

00:53 So, this is going to be the first reading which we filled into the table.

00:58 Now, the second one pg is equals to 10 to the power 2 by 10 that will be goes to 10 to the power 1 by 5 and hence this will be approximately comes 1 .6.

01:12 Now, next reading will be third pg is equals to 10 to the power 3 by 10 that will be equals to 1 .995 this will be approximately 2 .0.

01:27 And finally, pl will be equals to 1 over 2 that will comes out equals to 0 .5.

01:36 Now, the fourth reading can be fill out like pg is equals to we have to put decibel as 4.

01:43 So, it will be 10 to the power 4 by 10 would be equals to 10 to the power 0 .4 approximately equals to 2 .5.

01:51 Now, fifth reading now we also have to find a pl.

01:56 So, pl is nothing but what 1 by pg.

01:59 So, that will be equals to 1 by 2 .5 will comes out approximately 0 .4...

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