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SCHOOL OF ARCHITECTURE , BUILDING & DESIGN BACHELOR OF SCIENCE ( ARCHITECTURE ) BUILDING SCIENCE 2 [ BLD 61303 ] PROJECT 2 - INTEGRATION PROJECT TUTOR - MR AZIM CHIA WEE MIN 0315186

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Page 1: Final report bsc 2

SCHOOL OF ARCHITECTURE , BUILDING & DESIGN

BACHELOR OF SCIENCE ( ARCHITECTURE )

BUILDING SCIENCE 2 [ BLD 61303 ]

PROJECT 2 - INTEGRATION PROJECT

TUTOR - MR AZIM

CHIA WEE MIN

0315186

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Building Science 2 Project 2 Integration Project

Chia Wee Min 0315186

TABLE OF CONTENT

1.0 Introduction To Studio Design

2.0 Lighting

2.1 Artificial Lighting For Discussion Room

2.2 Artificial Lighting For Cafe

2.3 Ecotect for Cafe

2.4 PSALI for Discussion Room

2.5 PSALI for Cafe

3.0 Acoustic

3.1 Reverberation Time for Discussion Room

3.2 Sound Reduction Index for Cafe

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Building Science 2 Project 2 Integration Project

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1.0 INTRODUCTION TO STUDIO DESIGN

NAME COMMUNITY LIBRARY IN SENTUL

LOCATION JALAN HAJI SALLEH

FUNCTION FUNCTIONED AS A COMMUNITY LIBRARY BUT ALSO REACT WITH

PUBLIC REALM

DESIGN STATEMENT LIBRARY AREA AROUND 1800 M2 TO 2000 M2

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2.0 ARTIFICIAL LIGHTING

2.1 ARTIFICIAL LIGHTING FOR DISCUSSION ROOM ( 2ND FLOOR )

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Building Science 2 Project 2 Integration Project

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DISCUSSION ROOM

LIGHT TYPE ( Philips Down Light )

General Specs

Application Down light

Color White

Material Aluminum & Synthetics

Lamp Base & wattage LED 12 W

Color Temperature 2700K, 6500K

Dimensions ( L x W x H ) 132 x 132 x 81 mm

Lumen 1680 lm

Dimension Of Zone (m) 5 x 3

Total Floor Area / A (m2) 15 m2

Type Of Lighting Fixture Ceiling

Lumen Of Lighting

Fixtures / F (Lm) 1680 Lm

Height Of Luminaire (M) 3.4 m

Work Level (M) 0.8 m

Component Material Colour

Surface

Finishes

Reflectance

Value ( %)

Wall

Concrete Dark Grey Matte 15

Clear Glass Transparent Glossy 8

Aluminium

Frame Black Matte 10

Door

Glass Door Transparent Glossy 8

Aluminium

Frame Black Matte 10

Floor Laminated

Wood Parquet Light Brown Glossy 35

Furniture Wooden Chair Brown Matte 30

Wooden Table Brown Matte 30

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Mounting Height / H

( Hm) 2.6 m

Assumption Of

Reflectance Value Ceiling = 0.7 Wall = 0.5 Floor = 0.2

Room Index / RI

๐‘…๐ผ = ( ๐ฟ ร— ๐‘Š )

๐ป๐‘š ( ๐ฟ + ๐‘Š )

๐‘…๐ผ = (15)

2.6 (5 + 3 )

= 0.72

Utilization Factor / UF 0.34

Maintenance Factor /

MF 0.8

Illuminance Level / E

( Lux ) ( Ms1525 )

150

Number Of Lighting

Fixture / N

๐‘ = ๐ธ ร— ๐ด

( ๐น ร— ๐‘ˆ๐น ร— ๐‘€๐น )

๐‘ = 150 ร— 15

( 1680 ร— 0.34 ร— 0.8 )

= 5

Fitting layout by

approximately / m

Smax = 1.0 x Hm

= 1.0 x 2.6

= 2.6 m

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2.2 ARTIFICIAL LIGHTING FOR CAFE ( FIRST FLOOR )

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CAFE

LIGHT TYPE ( Philips Down Light )

General Specs

Application Down light

Color White

Material Aluminum & Synthetics

Lamp Base & wattage LED 12 W

Color Temperature 2700K, 6500K

Dimensions ( L x W x H ) 132 x 132 x 81 mm

Lumen 1680 lm

Dimension Of Zone (m) 7.3 x 14

Total Floor Area / A (m2) 102.2 m2

Type Of Lighting Fixture Ceiling

Lumen Of Lighting

Fixtures / F (Lm) 1680 Lm

Height Of Luminaire (M) 3.4 m

Work Level (M) 0.8 m

Component Material Colour

Surface

Finishes

Reflectance

Value ( %)

Wall

Concrete Dark Grey Matte 15

Clear Glass Transparent Glossy 8

Aluminium

Frame Black Matte 10

Door

Glass Door Transparent Glossy 8

Aluminium

Frame Black Matte 10

Floor Laminated

Wood Parquet Light Brown Glossy 35

Furniture Wooden Chair Brown Matte 30

Wooden Table Brown Matte 30

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Building Science 2 Project 2 Integration Project

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Mounting Height / H

( Hm) 2.6 m

Assumption Of

Reflectance Value Ceiling = 0.7 Wall = 0.5 Floor = 0.2

Room Index / RI

๐‘…๐ผ = ( ๐ฟ ร— ๐‘Š )

๐ป๐‘š ( ๐ฟ + ๐‘Š )

๐‘…๐ผ = (102.2)

2.6 (7 + 14 )

= 2.2

Utilization Factor / UF 0.46

Maintenance Factor /

MF 0.8

Illuminance Level / E

( Lux ) ( Ms1525 )

100

Number Of Lighting

Fixture / N

๐‘ = ๐ธ ร— ๐ด

( ๐น ร— ๐‘ˆ๐น ร— ๐‘€๐น )

๐‘ = 100 ร— 102.2

( 1680 ร— 0.46 ร— 0.8 )

= 17

Fitting layout by

approximately / m

Smax = 1.0 x Hm

= 1.0 x 2.6

= 2.6 m

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2.3 ECOTECT FOR CAFE ( FIRST FLOOR )

DAYTIME ARTIFICIAL LIGHT

According to diagram above, area

near the front and back received

more natural daylight compare to

the middle part. Hence the

intensity is the highest

According to diagram above, it shows that

from blue to yellow represents the intensity of

light from low to high and the brightest is in

the middle of the cafe as there will not receive

any natural daylight. Hence, the artificial lights

focus on the middle part of the cafe.

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2.4 PSALI FOR DISCUSSION ROOM ( 2ND FLOOR )

Lighting arrangement for the discussion room. As the discussion room receive natural

daylight from 3 faces, the natural daylight that penetrate will lit up half of the

discussion room. According to MS1525, discussion room requires 150 Lux and

therefore min 5 nos of lights are required. For this discussion room, there are 6 nos of

lights placed and controlled by two switches.

During daytime, as half of the discussion room will receive the natural daylight, only

switch 2 is switched on to get enough luminance for the discussion room. During night

time, the space will not get any natural daylight so all of the lights are switched on.

This layout arrangement for the lighting is to reduce the amount of energy waste to lit

up the room during day.

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Building Science 2 Project 2 Integration Project

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2.5 PSALI FOR CAFE ( FIRST FLOOR )

For cafe, there are 3 switches controlling the lights . during daytime, switch 1 and

switch 3 can be switched off as there are natural daylight penetrating into the space.

As for night time, all the lights are on as there will be no natural daylight penetrating

into the space.

Lighting arrangement for cafe. As the cafe

receive natural daylight at the front and back ,

the natural daylight that penetrate through will lit

up the front and back part of the cafe while the

middle part of the cafe will receive minimum

daylight. According to MS1525, cafe requires 100

Lux and therefore min 17 nos of lights are

required. For the cafe, there are 18 nos of lights

and 3 switches controlling 6 light each.

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3.0 ACOUSTIC

3.1 REVERBERATION TIME FOR DISCUSSION ROOM ( 2nd FLOOR )

Volume for Discussion Room

= 5m x 3m

= 15 m2

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REVERBERATION TIME (DISCUSSION ROOM) at 500 Hz during NON PEAK

Volume for Discussion Room

= 15 x 4

= 60 m3

๐‘…๐‘‡ = 0.16 ร—๐‘‰๐‘œ๐‘™๐‘ข๐‘š๐‘’๐‘œ๐‘“๐‘ ๐‘๐‘Ž๐‘๐‘’

๐ด๐‘๐‘ ๐‘œ๐‘Ÿ๐‘๐‘ก๐‘–๐‘œ๐‘›๐‘Ž๐‘Ÿ๐‘’๐‘Ž

๐‘…๐‘‡ = 0.16 ร—60

9.948

๐‘…๐‘‡ = ๐ŸŽ.๐Ÿ—๐Ÿ•๐’”

The reverberation time for Discussion Room at 500 Hz for non-peak hour with 4 persons

occupying the space is 0.97 s which falls within the comfort reverberation time between

0.8s - 1.3s. This show that the acoustic absorption within this space is sufficient.

Component Material

Absorption

Coefficient ( 500

Hz ) , S Area ( m2 ), A

Sound

Absorption ( SA )

Wall

Concrete 0.05 12 0.6

Clear

Glass 0.1 29.6 2.96

Aluminum

Frame 0.25 2.4 0.6

Door

Glass Door 0.1 21.6 2.16

Aluminum

Frame 0.25 0.84 0.21

Floor

Laminated

Wood

Parquet 0.07 15 1.05

Furniture Wooden

Chair 0.1 2.4 0.24

Wooden

Table 0.1 2.88 0.288

Occupant ( non

Peak ) 0.46 4 1.84

Total Absorption 9.948

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REVERBERATION TIME (DISCUSSION ROOM) at 500 Hz during PEAK

Component Material

Absorption

Coefficient ( 500

Hz ) , S Area ( m2 ), A

Sound Absorption

( SA )

Wall

Concrete 0.05 12 0.6

Clear Glass 0.1 29.6 2.96

Aluminum Frame 0.25 2.4 0.6

Door Glass Door 0.1 21.6 2.16

Aluminum Frame 0.25 0.84 0.21

Floor Laminated Wood

Parquet 0.07 15 1.05

Furniture Wooden Chair 0.1 2.4 0.24

Wooden Table 0.1 2.88 0.288

Occupant

( Peak ) 0.46 8 3.68

Total Absorption 11.788

Volume for Discussion Room

= 15 x 4

= 60 m3

๐‘…๐‘‡ = 0.16 ร—๐‘‰๐‘œ๐‘™๐‘ข๐‘š๐‘’๐‘œ๐‘“๐‘ ๐‘๐‘Ž๐‘๐‘’

๐ด๐‘๐‘ ๐‘œ๐‘Ÿ๐‘๐‘ก๐‘–๐‘œ๐‘›๐‘Ž๐‘Ÿ๐‘’๐‘Ž

๐‘…๐‘‡ = 0.16 ร—60

11.79

๐‘…๐‘‡ = ๐ŸŽ.๐Ÿ–๐Ÿ๐’”

The reverberation time for Zone 1 at 500 Hz for peak hour with 8 persons occupying

the space is 0.81 s which falls within the comfort reverberation time between 0.8s -

1.3s. This shows that the acoustic absorption within this space is sufficient.

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REVERBERATION TIME (DISCUSSION ROOM) at 2000 Hz during NON PEAK

Component Material

Absorption

Coefficient ( 2000

Hz ) , S Area ( m2 ), A

Sound Absorption

( SA )

Wall

Concrete 0.05 12 0.6

Clear Glass 0.07 29.6 2.072

Aluminum Frame 0.25 2.4 0.6

Door Glass Door 0.07 21.6 1.512

Aluminum Frame 0.25 0.84 0.21

Floor Laminated Wood

Parquet 0.06 15 0.9

Furniture Wooden Chair 0.1 2.4 0.24

Wooden Table 0.1 2.88 0.288

Occupant

( non Peak ) 0.51 4 2.04

Total Absorption 8.462

Volume for Discussion Room

= 15 x 4

= 60 m3

๐‘…๐‘‡ = 0.16 ร—๐‘‰๐‘œ๐‘™๐‘ข๐‘š๐‘’๐‘œ๐‘“๐‘ ๐‘๐‘Ž๐‘๐‘’

๐ด๐‘๐‘ ๐‘œ๐‘Ÿ๐‘๐‘ก๐‘–๐‘œ๐‘›๐‘Ž๐‘Ÿ๐‘’๐‘Ž

๐‘…๐‘‡ = 0.16 ร—60

8.46

๐‘…๐‘‡ = ๐Ÿ.๐Ÿ๐Ÿ‘๐’”

The reverberation time for Zone 1 at 2000 Hz for non-peak hour with 4 persons

occupying the space is 1.13 s which falls within the comfort reverberation time

between 0.8s - 1.3s. This shows that the acoustic absorption within this space is

sufficient.

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REVERBERATION TIME (DISCUSSION ROOM) at 2000 Hz during PEAK

Volume for Discussion Room

= 15 x 4

= 60 m3

๐‘…๐‘‡ = 0.16 ร—๐‘‰๐‘œ๐‘™๐‘ข๐‘š๐‘’๐‘œ๐‘“๐‘ ๐‘๐‘Ž๐‘๐‘’

๐ด๐‘๐‘ ๐‘œ๐‘Ÿ๐‘๐‘ก๐‘–๐‘œ๐‘›๐‘Ž๐‘Ÿ๐‘’๐‘Ž

๐‘…๐‘‡ = 0.16 ร—60

10.502

๐‘…๐‘‡ = ๐ŸŽ.๐Ÿ—๐Ÿ๐’”

The reverberation time for Zone 1 at 2000 Hz for peak hour with 8 persons occupying

the space is 0.91 s which falls within the comfort reverberation time between 0.8s -

1.3s. This shows that the acoustic absorption within this space is sufficient.

Component Material

Absorption

Coefficient

( 2000 Hz ) , S Area ( m2 ), A Sound Absorption ( SA )

Wall

Concrete 0.05 12 0.6

Clear Glass 0.07 29.6 2.072

Aluminum Frame 0.25 2.4 0.6

Door Glass Door 0.07 21.6 1.512

Aluminum Frame 0.25 0.84 0.21

Floor Laminated Wood

Parquet 0.06 15 0.9

Furniture Wooden Chair 0.1 2.4 0.24

Wooden Table 0.1 2.88 0.288

Occupant

(Peak ) 0.51 8 4.08

Total Absorption 10.502

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3.2 SOUND REDUCTION INDEX FOR CAFE ( FIRST FLOOR )

Sound reduction index (SRI) is used to measure the level of sound insulation provided by

structure such as wall, window, door, or ventilator.

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TRANSMISSION LOSS (CAFE)

Transmission Coefficient of material,

Building Element Material Surface Area (m2 ) SRI (dB)

Wall Concrete 101.7 42

Window Clear Glass 46 26

Aluminum Frame 2 44

Door Glass Door 43.8 26

Aluminum Frame 3.6 44

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘๐‘œ๐‘’๐‘“๐‘“๐‘–๐‘๐‘–๐‘’๐‘›๐‘ก

1. Concrete Wall

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘ค๐‘Ž๐‘™๐‘™

42 = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘ค๐‘Ž๐‘™๐‘™

log 4.2 = 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘ค๐‘Ž๐‘™๐‘™

๐‘ป๐’“๐’‚๐’๐’”๐’Ž๐’Š๐’”๐’”๐’Š๐’๐’๐‘พ๐’‚๐’๐’ = ๐Ÿ”.๐Ÿ‘๐Ÿ ร— ๐Ÿ๐ŸŽโˆ’๐Ÿ“

2. Clear Glass Wall

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘”๐‘™๐‘Ž๐‘ ๐‘ ๐‘ค๐‘Ž๐‘™๐‘™

26 = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘”๐‘™๐‘Ž๐‘ ๐‘ ๐‘ค๐‘Ž๐‘™๐‘™

log 2.6 = 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘”๐‘™๐‘Ž๐‘ ๐‘ ๐‘ค๐‘Ž๐‘™๐‘™

๐‘ป๐’“๐’‚๐’๐’”๐’Ž๐’Š๐’”๐’”๐’Š๐’๐’๐‘ฎ๐’๐’‚๐’”๐’”๐‘พ๐’‚๐’๐’ = ๐Ÿ.๐Ÿ“๐Ÿ ร— ๐Ÿ๐ŸŽโˆ’๐Ÿ‘

3. Aluminum Frame Wall

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘ค๐‘–๐‘›๐‘‘๐‘œ๐‘ค๐‘“๐‘Ÿ๐‘Ž๐‘š๐‘’

44 = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘ค๐‘–๐‘›๐‘‘๐‘œ๐‘ค๐‘“๐‘Ÿ๐‘Ž๐‘š๐‘’

log 4.4 = 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘ค๐‘–๐‘›๐‘‘๐‘œ๐‘ค๐‘“๐‘Ÿ๐‘Ž๐‘š๐‘’

๐‘ป๐’“๐’‚๐’๐’”๐’Ž๐’Š๐’”๐’”๐’Š๐’๐’๐‘พ๐’Š๐’๐’…๐’๐’˜๐‘ญ๐’“๐’‚๐’Ž๐’† = ๐Ÿ‘.๐Ÿ—๐Ÿ– ร— ๐Ÿ๐ŸŽโˆ’๐Ÿ“

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4. Glass Door

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘”๐‘™๐‘Ž๐‘ ๐‘ ๐‘‘๐‘œ๐‘œ๐‘Ÿ

26 = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘”๐‘™๐‘Ž๐‘ ๐‘ ๐‘‘๐‘œ๐‘œ๐‘Ÿ

log 2.6 = 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘”๐‘™๐‘Ž๐‘ ๐‘ ๐‘‘๐‘œ๐‘œ๐‘Ÿ

๐‘ป๐’“๐’‚๐’๐’”๐’Ž๐’Š๐’”๐’”๐’Š๐’๐’๐‘ฎ๐’๐’‚๐’”๐’”๐‘ซ๐’๐’๐’“ = ๐Ÿ.๐Ÿ“๐Ÿ ร— ๐Ÿ๐ŸŽโˆ’๐Ÿ‘

5. Aluminum Frame Door

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘‘๐‘œ๐‘œ๐‘Ÿ๐‘“๐‘Ÿ๐‘Ž๐‘š๐‘’

44 = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘‘๐‘œ๐‘œ๐‘Ÿ๐‘“๐‘Ÿ๐‘Ž๐‘š๐‘’

log 4.4 = 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘‘๐‘œ๐‘œ๐‘Ÿ๐‘“๐‘Ÿ๐‘Ž๐‘š๐‘’

๐‘ป๐’“๐’‚๐’๐’”๐’Ž๐’Š๐’”๐’”๐’Š๐’๐’๐‘ซ๐’๐’๐’“๐‘ญ๐’“๐’‚๐’Ž๐’† = ๐Ÿ‘.๐Ÿ—๐Ÿ– ร— ๐Ÿ๐ŸŽโˆ’๐Ÿ“

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SOUND REDUCTION INDEX CALCULATION (CAFร‰)

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘œ๐‘ฃ๐‘’๐‘Ÿ๐‘Ž๐‘™๐‘™

๐‘‡๐‘œ๐‘ฃ๐‘’๐‘Ÿ๐‘Ž๐‘™๐‘™ = ๐‘†๐‘› โˆ— ๐‘‡๐‘›

๐‘‡๐‘œ๐‘ก๐‘Ž๐‘™ ๐‘ ๐‘ข๐‘Ÿ๐‘“๐‘Ž๐‘๐‘’ ๐‘Ž๐‘Ÿ๐‘’๐‘Ž

๐‘‡๐‘œ๐‘ฃ๐‘’๐‘Ÿ๐‘Ž๐‘™๐‘™

= 6.42 ร— 10โˆ’4 + 1.15 ร— 10โˆ’1 + 7.96 ร— 10โˆ’5 + 1.10 ร— 10โˆ’1 + 1.43 ร— 10โˆ’4

197.1

= 1.15 x 10 -3

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

๐‘‡๐‘Ÿ๐‘Ž๐‘›๐‘ ๐‘š๐‘–๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘œ๐‘ฃ๐‘’๐‘Ÿ๐‘Ž๐‘™๐‘™

๐‘†๐‘…๐ผ = 10 ๐‘™๐‘œ๐‘” 1

1.15 ร— 10โˆ’3

๐‘†๐‘…๐ผ = 10 log 1

1.15 ร— 10โˆ’3

SRI = 29.4 dB

Based on the calculation, the sound reduction index value of the whole open space of

the cafe is 29.4 dB.

Sound Reduction

Index Hearing Conditions

35 dB or less Normal speech can be understood quite easily and distinctly

through the walls

35 to 40 dB Loud speech can be understood fairly well. Normal speech can be

heard but not easily understood

40 to 45 dB Loud speech can be heard, but it is not easily intelligible. Normal

speech can be heard only faintly, if at all.

Material SRI ( dB )

Surface area

( m2 ) ( S)

Transmission

Coefficient ( T) ST

Concrete 42 101.7 6.31 x 10 -5 6.42 x 10 -4

Clear

glass 26 46 2.51 x 10 -3 1.15 x 10 -1

Aluminum

Frame 44 2 3.98 x 10 -5 7.96 x 10 -5

Glass

Door 26 43.8 2.51 x 10 -3 1.10 x 10 -1

Aluminum

Frame 44 3.6 3.98 x 10 -5 1.43 x 10 -4

197.1

Page 22: Final report bsc 2

Building Science 2 Project 2 Integration Project

Chia Wee Min 0315186

45 to 50 dB Loud speech can be faintly heard but not understood. Normal

speech is inaudible

55 dB or greater Very loud sounds, such as loud singing, brass musical instruments or a

radio at full volume can be heard faintly or not at all.

According to the general sound environment, the value is categorized as less than 35dB

which is loud according to the normal conversation and can be heard distinctly through

the walls. This cafe spaces uses variety of materials such as concrete, glass, and

aluminum. To be able to achieve better acoustic absorption, the balance use of

effective materials is important, it helps the overall reduction of sound transmission

between spaces.