The frequency, fof an oscillating disturbance is equal to number of times (cycle) every second the disturbance passes from the one extreme position to other and back to original position. The number of times (cycles) per second is called Hertz. Basically. the frequency in pure tone sound wave namely pitch of the tone. Briefly describe the particular type of sound as shown in the Figure Q2(a). (a)

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p=1

q=9

r=0

s=1

t=7

u=0

The frequency, f of an oscillating disturbance is equal to number of times (cycle) every
second the disturbance passes from the one extreme position to other and back to
original position. The number of times (cycles) per second is called Hertz. Basically,
the frequency in pure tone sound wave namely pitch of the tone. Briefly describe the
particular type of sound as shown in the Figure Q2(a).
Q2
(а)
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):
(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)
Transcribed Image Text:The frequency, f of an oscillating disturbance is equal to number of times (cycle) every second the disturbance passes from the one extreme position to other and back to original position. The number of times (cycles) per second is called Hertz. Basically, the frequency in pure tone sound wave namely pitch of the tone. Briefly describe the particular type of sound as shown in the Figure Q2(a). Q2 (а) 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): (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)
Table Q2(c)
Level (dB)
Machine No.
A weighting (dB)
-8.6
-3.2
250
9P
500
8Q
1000
9R
2000
7S
1.2
4000
6T
1
8000
8U
-1.1
Transcribed Image Text:Table Q2(c) Level (dB) Machine No. A weighting (dB) -8.6 -3.2 250 9P 500 8Q 1000 9R 2000 7S 1.2 4000 6T 1 8000 8U -1.1
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