TABLE OF CONTENT
ABSTRACT
1.0 INTRODUCTION
1.1 Objectives
1.2 Site Study
1.2.1 Introduction
1.2.2 Site Selection Reasons
1.2.3 Measured Drawings
1.3 Methodology
1.3.1 Identification of Existing Conditions
2.0 LITERATURE REVIEW
2.1 Acoustics
2.1.1 Sound
2.1.2 Amplitude, Wavelength & Frequency
2.1.3 Common Sound in Decibels
2.1.4 Acoustics in Architecture
2.1.5 Acoustics Standard ANSI (2008) S12.2-2008
3.0 PRECEDENT STUDY
3.1 Introduction to Building
3.2 Statistical Analysis Method/Questionnaire
3.3 Formula for Acoustic Analysis Calculation
4.0 CASE STUDY
4.1 Site Study and Zoning
4.2 External Noise Source
4.3 Interior Noise Sources
4.3.1 SPACE 1: Gymnasium
4.3.1.1 Existing Equipment
4.3.1.2 Cooling System
4.3.1.3 Human noise
4.3.2 SPACE 2: Physiology Room
4.3.2.1 Existing Equipment
4.3.2.2 Cooling System
4.3.2.3 Human noise
4.4 Tabulation & Interpretation of Data
4.5 Acoustic Fixtures and Specifications
4.6 Gymasium calculation
4.6.1 Calculation of sound intensity of indoor noise source
4.6.2 The calculation of sound level
4.6.3 Analysis & Evaluation
4.6.4 Sound reduction index calculation
4.6.5 Reverberation Time Calculation
4.7 Acoustic Analysis
4.8 PHYSIOTHERAPY CALCULATION
4.8.1 Calculation of sound intensity of indoor noise source
4.8.2 The calculation of sound level
4.8.3 Analysis & Evaluation
4.8.4 Sound reduction index calculation
4.8.5 Reverberation Time Calculation
4.9 Acoustic Analysis for Physiotherapy
5.0 References
ABSTRACT
This report consists of the study of how acoustics affects the environment and we
chose to conduct at SOSCO Rehabilitation Centre, Melacca as our case study. In
order to carry out the performance evaluation, weve requested the proper floor
plans from the facilities management that govern the site buildings, and also
produced elevations and sections for the ease of data collection. Collection of
acoustics data is carried out at the functioning hour of the building to quantify and
qualify the existing condition of the site. All the data and drawings collected were
then further used to carry out an analysis to study the performance of the
building. A list of figures are used as well and a list of references is provided at the
end of the report for the ease of navigation. Additionally, photographs were also
taken on site to further identify acoustics sources of the chosen area.
1.0 INTRODUCTION
Acoustics study on buildings and spaces within is crucial as considerations of
maintaining and having good quality noise control. Some key spaces that requires
critical acoustics control are galleries, concert halls, restaurants and many other
spaces.
In short, this project is design to expose and introduce us acoustics requirement in
a suggested space. In a group of 7, we have chosen SOSCO Rehabilitation Centre,
Melacca, as our site study. We have conducted several site visits to ensure the
success of the project outcome. Measurement and calculations of acoustic
readings and site measurement are done during the visits and after the visit
respectively. Lastly, we concluded the analysis based on the results of our findings
and observations.
1.1
Objectives and Aim
1.
2.
3.
4.
To observe and understand acoustics and its characteristics.
To understand acoustic requirement in a suggested place.
To determine the different types of acoustics throughout this project.
To determine the characteristics and function of sound within the intended
space.
5. To critically report and analyze the space and suggest remedies to improve
acoustic qualities within the space.
The primary objective of this project is to impart the understanding of acoustics
and characteristic and requirement in a suggested space, thereby determine their
functions and various factors affecting it. With the data collected and the relevant
knowledge, an analysis is to perform to evaluate the suggested space with a
critical mindset. Besides that, understanding the acoustics elements and existing
arrangement helps in determining the acoustics characteristics that is reflected in
the data collection by using certain methods or calculations. Backed up with
precedent studies, drawing comparison with the site study, our precedent studies
will aid in achieving all the objectives above.
1.2 Site Study
Case Study:
SOCSO Rehabilitation Center, Melacca.
Identification of space: Gymnasium rehabilitation space and physiotherapy room.
Address:
Pusat Rehabilitasi Perkeso
Lot PT 7263 [H.S (D) 18923]
Bandar Hijau, Hang Tuah Jaya,
Melaka, 75450, Malaysia.
1.2.1 Introduction
SOCSO Rehabilitation Centre is located at Bandar Hijau, Hang Tuah Jaya,
Melacca. It is a rehabilitation centre that consists of an administration block and 5
extended wings. Namely, the Gymnasium, Vocational, Physiotherapy,
Hydrotherapy and the Speech and Audio therapy.
Under SOCSOs "Return to Work" program, disabled patients undergo
physical and vocational rehabilitation in order to rejoin the workforce. The
architect, Anuar Aziz Architect, called this process the "Journey to Healing," where
the patients will heal physically and mentally, and lead a normal working life after
the rehabilitation process.
The allied health institute will provide the skilled personnel. This green certified
complex was designed with nature and spirituality integral to the healing
process. A universal access-for-all concept and Malaysian Standard for disabled
access is applied throughout.
The concept of the building is each building is given a different identity according
to functions and ease of way finding. Calming and soft colors are utilized
throughout the complex.
1.2.2 Site Selection Reasons
Based
on
observation, the building provides sufficient functional spaces to conduct out an
analysis on acoustics conditions. The gymnasium space and the physiological
therapy space with specific function would help us develop an understanding on
how noise is controlled to achieve comfort for users based on different programs
and functions.
In terms of acoustics properties, the gymnasium space and the physiological
therapy space can be categorized into semi enclosed space, though the
gymnasium has a higher ceiling space compared to the other. Numerous noise
producing elements are spotted within the spaces ranging from electronic
equipments, to human activities.
1.2.3 Measured Drawings
Figure 1 Floor Plan of Physiotherapy Room
Figure 2 Floor plan of Gymnasium Room
2.0 Precedent study
2.1. INTRODUCTION TO BUILDING
Bahcesehir University (BAU) Office, Besiktas Campus
Figure 3.1a: Bahcesehir University Besiktas Campus
Located in Istanbul, Turkey, the Bahcesehir University is a well-known private
educational institution with its main campus located at the edge of the Bosporus
in Besiktas. The university consists of eight faculties: a school of language, two
vocational schools and four institutes that provide post graduate education, with
an average of 17,000 registered students studying at the university.
The space that we chose to study is the Faculty of Architecture & Design of
Bahcesehir University. Position on the side of the shore, the buildings are formed
in the shape of long, narrow rectangular prisms sited very close and are
interconnected to one another. These buildings face the garden on the shore and
sea with one of their narrow sides, and a high traffic artery of the city with the
other.
The office occupies half of the 1st floor of Block B and faces sea on the East, and
other two neighboring buildings (buildings A and C) on the north and south. There
are two different types of office spaces in the faculty. Open-offices with semienclosed partitions in the central area and are used by the teaching/research
assistants; the closed offices surrounding the central area from three sides,
shared by two or three academic staff. Closed offices, with regard to their
orientation as A and B, create 2 subgroups within closed office type.
2.1.2.1 ACOUSTIC COMFORT/NOISE CONTROL
Measurements regarding the
environmental noise in the space were taken
in the morning (10.00-10.11), noon (13.0013.12) and afternoon (16.26-16.36) times of
a working day, with the windows tightly shut.
These periods were decided about the
standard working hours of the users. Sound
level meter and sound pressure equipment
were set in the middle of the office and
central area 150cm above the ground level
and then used for comparison with the
standards IEC 60651 and IEC 60804.
Placeme
nt of equipment for acoustic analysis
2.3.1.2 ACOUSTIC COMFORT
Acoustics data of Office A close to neighboring building
Acoustics data of Office A campus side
Acoustics data of Office B
Acoustics data of Office C
2.4 Conclusion
Through the data taken in the precedent study of the Bahcesehir University
Besiktas Campus, the result was shown that the environmental noise appeared to
influence the perception of environmental quality. Mentioned by the occupants,
they show dissatisfaction of acoustic privacy and noise control due to the fact that
they are not that well maintained as it is affect by environmental elements.
The findings shown a slightly higher environmental sound intensity
compared to optimum human condition, the poor choice of materials for sound
buffering is one of the key faults of providing bad acoustic control
3.0 Research Methodology
3.1 Acoustic Analysis
Sound and Acoustic analysis plays a role in the acoustic design performance,
sound and noise level of the noise. The analysis might involve in design fine
tuning in order to achieve the standards from ANSI, IEC and ISO. A simple and
fairly effective method of diagnostics can be performed with acoustical
equipment.
Description of Equipment
(a)
Acoustic Measuring Equipment (Digital Sound Level Meter)
Figure 3.2.1.1: Sound Level Meter
GENERAL SPECIFICATIONS
Measurement
Resolution
Measured
Quantities
Linearity
30 130 dB
0.1 dB
Characteristics of A frequency weighting
network meet IEC 61672 class 2.
Under 94 dB input signal, the accuracy are:
31.5 Hz 3.5 dB
63 Hz 2.5 dB
125 Hz 2.0 dB
250 Hz 1.9 dB
500 Hz 1.9 dB
1 K Hz 1.4 dB
2 K Hz 2.6 dB
4 K Hz 3.6 dB
8 K Hz 5.6 dB
Power Supply
Alkaline or heavy duty DC 1.5V battery
(UM3,
AA) x 6 PCs. Or equivalent.
DC 9V adapter input. (AC/ DC power adapter is
optional).
Dimension
245mm x 68mm x 45mm
Weight
489g
Table 3.2.1.2: General Specification of Sound Level Meter
(b) Smartphone [OnePlus One]
An additional recording device is used as a result comparison with the digital
sound level meter. A median result is then obtained and will be averaged in the
recordings table.
(c) Measuring Tape
The tape is used to measure a constant height of the position of the sound meter
and the grids established for the area, which is at 1m and 1.5m respectively. The
height is taken on one person as reference to obtain an accurate reading.
(d) Camera [a7ii Sony]
The camera is used to record pictures on the source of sound in the cafe and its
surrounding.
3.2 Data Collection Method
The sound level meter is placed at the same height of 1m for each point in order
to obtain an accurate reading. This is done to ensure the consistency of the
measurements taken. The readings were recorded on a plotted plan with 1.5m x
1.5m gridlines. Noises produced by us students are kept to the minimum to obtain
the best sound reading result.
Procedure
1 Push the Power Switch to switch on the device.
2 Record the dB value by holding the Noise Indicator at 1m height,
approximately at waist height (ear level while sitting).
3 Record the data displayed on the device.
4 Repeat 2 and 3 until all data are completed.
Figure 3.2.2.1: Position of Noise Indicator at 1 meter
3.3 Formula for Acoustic Analysis Calculation
Calculation for Reverberation Time:
Reverberation time (RT) is a measure of the amount of reverberation in a space
and equal to the time required for the level of a steady sound to decay by 60dB
after the sound has stopped. The decay rate depends on the amount of sound
absorption in a room, the room geometry, and the frequency of the sound.
Reverberation Time Formula: RT = (0.16 x V) divide by A
Where,
V = Volume of space
A = Total absorption (Material Covering Area x Absorption Coefficient)
4.0 CASE STUDY
4.1 Site Study and Zoning
Annotated plan to indicate noise sources
