An operator in a textile mill is operating six machines. If the sound pressure levels of each machine at his position are given in Table Q2(b): Determine the total sound pressure level (in decibels) and total mean square pressure (in N/m?) produced by all six machines at the operator position. (i) If the two machines, M1 and M2 are turned off, and assuming that total sound pressure level is 120 dB, analyze the sound pressure level of the background noise (in decibels) and its mean square pressure (in N/m²) at the operator position. (ii)
An operator in a textile mill is operating six machines. If the sound pressure levels of each machine at his position are given in Table Q2(b): Determine the total sound pressure level (in decibels) and total mean square pressure (in N/m?) produced by all six machines at the operator position. (i) If the two machines, M1 and M2 are turned off, and assuming that total sound pressure level is 120 dB, analyze the sound pressure level of the background noise (in decibels) and its mean square pressure (in N/m²) at the operator position. (ii)
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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![An operator in a textile mill is operating six machines. If the sound pressure levels of
each machine at his position are given in Table Q2(b):
Determine the total sound pressure level (in decibels) and total mean square
pressure (in N/m²) produced by all six machines at the operator position.
(i)
If the two machines, M1 and M2 are turned off, and assuming that total sound
pressure level is 120 dB, analyze the sound pressure level of the background
noise (in decibels) and its mean square pressure (in N/m²) at the operator
position.
(ii)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9198db31-7d97-4196-9292-3f1ece6435c0%2Fc002cc2c-0680-4e87-a1e5-bc2c268b5ccd%2F16kj0wp_processed.png&w=3840&q=75)
Transcribed Image Text:An operator in a textile mill is operating six machines. If the sound pressure levels of
each machine at his position are given in Table Q2(b):
Determine the total sound pressure level (in decibels) and total mean square
pressure (in N/m²) produced by all six machines at the operator position.
(i)
If the two machines, M1 and M2 are turned off, and assuming that total sound
pressure level is 120 dB, analyze the sound pressure level of the background
noise (in decibels) and its mean square pressure (in N/m²) at the operator
position.
(ii)
![Table Q2(b)
Machine No.
Level (dB)
91
M1
M2
819
910
71
6'0
83
M3
M4
M5
M6
Table Q2(c)
Level (dB)
91
Machine No.
A weighting (dB)
-8.6
-3.2
250
500
89
90
71
1000
2000
1.2
4000
8000
60
83
1
-1.1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9198db31-7d97-4196-9292-3f1ece6435c0%2Fc002cc2c-0680-4e87-a1e5-bc2c268b5ccd%2F0hipb5d_processed.png&w=3840&q=75)
Transcribed Image Text:Table Q2(b)
Machine No.
Level (dB)
91
M1
M2
819
910
71
6'0
83
M3
M4
M5
M6
Table Q2(c)
Level (dB)
91
Machine No.
A weighting (dB)
-8.6
-3.2
250
500
89
90
71
1000
2000
1.2
4000
8000
60
83
1
-1.1
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