(i) 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) 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.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
For Question 2 part 1
![Table Q2(b)
Machine No.
Level (dB)
M1
91
M2
89
90
M3
М4
72
M5
63
M6
85
Table Q2(c)
Level (dB)
91
Machine No.
A weighting (dB)
250
-8.6
500
89
-3.2
1000
90
2000
72
1.2
4000
63
1
8000
85
-1.1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faf8e3689-3c27-404e-9cdb-e85b9dcd49df%2Faf1ed178-e098-4659-a5de-d5ecb0ba8b8a%2F7r4bhxp_processed.png&w=3840&q=75)
Transcribed Image Text:Table Q2(b)
Machine No.
Level (dB)
M1
91
M2
89
90
M3
М4
72
M5
63
M6
85
Table Q2(c)
Level (dB)
91
Machine No.
A weighting (dB)
250
-8.6
500
89
-3.2
1000
90
2000
72
1.2
4000
63
1
8000
85
-1.1
![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):
(i)
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.
(ii)
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.
(iii)
If the data from Table Q2(b) is converted to octave band as shown in Table
Q2(c), examine the total sound pressure level in dB(A) and total mean square
pressure (in N/m²).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faf8e3689-3c27-404e-9cdb-e85b9dcd49df%2Faf1ed178-e098-4659-a5de-d5ecb0ba8b8a%2Fctqs0ab_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):
(i)
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.
(ii)
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.
(iii)
If the data from Table Q2(b) is converted to octave band as shown in Table
Q2(c), examine the total sound pressure level in dB(A) and total mean square
pressure (in N/m²).
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