Problem and Data
Problem and Data
Problem and Data
Project method
Determe
Determine Measure the Find the
source of Conclusion
the location noise level solution
problem
Survey method :
Data
Discussion
In this project we measure the noise in one place when the rush hour occur and then we
will determine whether it is a trouble or not based on the regulation. Based on the data above, we
can make the graph about the sound level in one place.
84.2
84
83.8
83.6
83.4
dB
83.2
83
82.8
82.6
82.4
5.30 6.30 7.30
Time
We can see that the maximum level of noise is 84 db, the minimum level is 84 and the average sound
level is 83.667 dB. All of this data is collected when the rush hour is happening and then based on
this data we can conclude that the noise will be around 80+ dB when rush hour is occur in this place.
Figure 2. dB to dB ABC
In this project, we got the frequency of the sound in the place is 1 kHz and based on figure 2 we can
assume that dB to dBa will not change too much, so we assume data that we got is equal too dBa.
After this, we will compare the data that we got with World Health Organization (WHO) standards.
85 8 hours
88 4 hours
91 2 hours
94 1 hour
97 30 minutes
100 15 minutes
112 56 seconds
115 28 seconds
118 14 seconds
121 7 seconds
124 3 seconds
127 1 second
140 NO EXPOSURE
If we compare the result with WHO standards, our noise maximum exposure will be more than 8
hours, we can calculate this by using this equation.
t = 8 / 2(L - 85)/3
t = 8 / 2(83.666 - 85)/3
t = 10.887 hours
Assuming rush hour is 4 hours per day, we can calculate the amount of exposure of the
noise.
4
Exposure = 10.887 ∗ 100%
Exposure =36.7%
By looking this number, the exposure that the people got when driving 4 hour is already more than
1 quarter, by imagining that people will got another exposure from other 20 hours we determine
that there is problem with this.
Problem
Average operating speeds of vehicle (usually people will drive really fast)
The noise itself can make many problem to people such as increase stress hormones, hearing
impairment, hypertension, ischemic heart disease, annoyance, and sleep Disturbance
Reference
https://www.engineeringtoolbox.com/decibel-d_59.html
https://www.noisehelp.com/noise-dose.html