DETERMINATION OF SOUND LEVEL IN DIFFERENT WORKPLACES

1. COURSE NO : IPE 3202
COURSE NAME : ERGONOMICS, SAFETY &
PRODUCTIVITY ENGINEERING
SESSIONAL.
EXPERIMENT NO : 03
EXPERIMENT NAME : DETERMINATION OF SOUND LEVEL
IN DIFFERENT WORKPLACES.
Date of performance : 27-07-2016
Date of submission : 04-08-2016
Submitted by-
ID :13.02.07.101 Year / Sem : 3rd/2nd
13.02.07.102 Section : B
13.02.07.104 Group No : 4
13.02.07.106 Department : MPE(IPE)
Ahsanullah University Of Science & Technology

2. Objective:
The objective of this experiment is to constructa noise map of a sound emitting
source. And critically analyze the findings & comment for improvements.
Apparatus:
1. Sound Level Meter
2. Measurement Tape
Sound Emitting Source:
 Horizontal Milling Machine
Working Condition Of Source:
 Working RPM: 300

3. Schematic Diagram of the Source:
Fig: Horizontal Milling Machine

4. Data Table:
Position Distance (cm) Decibel (db)
1 46 80
2 20 80
3 50 80
4 54 80
5 25 80
6 57 80
Noise Contour Map:
Here, the distance between sound source and 6 spots are according to 46 cm, 20
cm, 50 cm, 54 cm, 25 cm & 57 cm.
SOUND
SOURCE
1
2
345
6

5. Discussion:
The workplace is the physical location where someone works. Such a place can
range from a home-office to a large office building or factory. Forindustrialized
societies, the workplace is one of the most important social spaces other than the
home. An employee's workplace environment is a key determinant of the quality of
their work and their level of productivity. How well the workplace engages an
employee impacts their desire to learn skills and their level of motivation to
perform. Skills and motivation level then influences an employee's:
 error rate
 output rate
 level of innovation
 collaboration with others
 absenteeism, and
 length of service
Hamper in workplace can producenegative impact on workers. Excessive noise is
one of the factors behind workplace disturbance. Noise at work can interfere with
communications and make warnings harder to hear. It can also reduce people’s
awareness of their surroundings. These issues can lead to safety risks – putting
people at risk of injury or death. Forthis purposesound level must be measured and
maintained for the greater cause.
In this experiment we were taught how to measure Sound in any workstation.
Measurement of Sound level in workspace is done to ensure the level of sound is
tolerable. A sound level meter was used to measure the sound level which is an
instrument that measures sound levels. Commonly the instrument is hand-held and
attached to a measurement microphone. It is used to determine if sounds in a
particular environment. The machine can set a limit.
In this experiment we were given the Milling machine as work. The working speed
was 300 RPM. For 300 RPM and milling machine the legit sound level is 80-85 db.
We set 80 db as limit in the sound level meter. Sound in six different directions
from the sound sourcewhich is milling machine was measured. This was done
because user has to move around the milling machine to perform any cutting or
other operations. Distance from the sourcewas measured by the measuring tape.
Some error occurred while performing the experiment as such the place wasn’t
sound proof. Sound of movement, Fan, talking and discussing might have
manipulated the data. Distance from the sound sourcemight have some error
because we couldn’t measure the distance directly from the sound source. The data

6. from the tape might have parallax error. Regardless of such conditions we
performed the experiment as successfully as possible. Through this experiment
awareness of the importance of sound level in any workplace was created. To
ensure productivity sound level must be controlled for the betterment of an industry
and it's workers.
This experiment is essential for any industry. In any industry Sound level should be
under surveillance to ensure better working condition for everyone. If sound level is
not standard than it should be changed to increase productivity of the total
manufacturing system. This was a good experience for us.