Building Science 2 Project 1

SCHOOL OF ARCHITECTURE, BUILDING AND DESIGN Bachelor of Science (Honours) in Architecture

Building Science II (ARC3413/BLD1303) PROJECT 1 : Auditorium : A Case Study on Acoustic Design Building chosen: MAS AcadamyAuditorium

TUTOR: Azim Sulaiman

MEMBERS: Sia Hong Jie

Iche Omari Keshni Devi Sobarun Sham Zhen Wen Danny Tong Pablo Idris

Song Sung Ho Jeffrey Liew Tan Wei Zhen

0323506 0323347 0323062 0317733 0323484 0321895 0322100 0317951 0318560

Table of Contents

Table of Contents

:01

1. Introduction

:03

2. Drawings of the auditorium

:07

3. Sound Absroption materials used

:13

4. Sound Source

:19

5. Sound Path

:25

6. Conclusion

:28

7. References

:29

-1-

Views of the auditorium

1. INTRODUCTION

Views of the auditorium

Introduction

M

alaysia Airlines Academy (MAA) was established

concerts, orchestra performances, traditional dances,

in October 1994 to cater to the training needs

fund raising for the blind, dance performances, cultural

of Malaysian Airlines employees. The building operated

collaborative art performances, Indian concerts, and

since 1995 and its distinct entity has been identified

many more.

as a key enabler to transform, educate and develop aviation professionals of the future.

The auditorium is constructed in a fan-shape design which helps the acoustics in the room. The speakers

The Malaysia Airlines Academy Auditorium is located

are positioned high enough for the raked floor of the

in Kelana Jaya which is just next to Lincoln University

auditorium and protruded into the audience area shows

College. The auditorium can fit up to 600 people. Even

the acoustical design consideration done for mixed

though the auditorium capacity is average, Malaysia

acoustical use. Therefore, all kind of programmes could

Airlines Academy has seen plenty of activity. Students

be held in Malaysia Airlines Academy Auditorium.

and staff of the academy use it as well for, MAS Cabin Crew Graduation, Annual General Meetings, and since the facility is open for public renting, they host plenty of programmes such as graduations, kindergarten

N

-4-

Event posters :

-5-

Fire escape plan of the auditorium.

2. DRAWINGS OF THE AUDITORIUM

An old lighting plan of the auditorium we found in the control room.

Drawings of Auditorium

Control room

Seats

Stage

Storeroom

Entrance

Entrance

Backstage Toilet

Backstage Entrance Storeroom

Toilet

Mechanical room

Plan 1 : 200 -8-

Storeroom

-9-

Section 1 : 100

Isometric 1 : 200 - 10 -

Axonometric 1 : 200 - 11 -

Isometric 1 : 200

3. MATERIAL USED FOR THE AUDITORIUM

Seats of the auditorium.

Material of Auditorium used

No.

Materials

Color

125

Absorption(Hz) 500 2000

Surface

Empty Fabric Seats 1.

Red

0.12

0.28

0.28

Semi-smooth

Grey

0.25

0.8

0.9

Rough

Dark Purple

0.05

0.10

0.20

Smooth

Red & Grey

0.10

0.50

0.60

Rough

White

0.20

0.20

0.40

Semi-smooth

Brown

0.02

0.05

0.10

Smooth

Brown

0.15

0.10

0.10

Smooth

White

0.02

0.05

0.05

Semi-smooth

Transparent

0.30

0.10

0.07

Smooth

Accoustic Panel 2.

Curtain 3.

Floor Carpet 4.

Plaster Wall 5.

Wooden Floor Finish 6.

Wood Board 7.

Concrete Ceiling 8.

Glass Window 9.

- 14 -

- 15 -

Reverbation time calculation 500Hz Surface Walls (Accoustic Panel) Walls (Plaster) Walls (Wood Board ) Ceiling (Concrete ceiling) Floor (Carpet Flooring) Floor (Wooden Floor Finish) Curtain Occupants Total absorption (A)

1000Hz

Area (m2) Absorption Abs. units Absroption Abs. unit (m2 coefficient (m2 sabins) (Hz) sabins) 400 200 100 400 300 100 50 600

0.8 0.2 0.1 0.05 0.5 0.05 0.1 0.46

320 40 10 20 150 5 5 276

0.9 0.4 0.1 0.05 0.6 0.1 0.2 0.6

826

500Hz:

1030

1000Hz:

=

=

The ideal reverbation time for multipurpose auditorium is 1.5s ~ 2.5s, but the results show this auditorium’s reverbation time is slightly below ideal range, so it is more suitable to be used as a speech hall or lecture hall.

- 16 -

360 80 10 20 180 10 10 360

- 17 -

Speaker’s view to the auditorium

4. SOUND SOURCE

An old sound control system that will be replaced soon in the control room.

Sound Source Sounds can be termed as wanted and unwanted sound(noise).

Sound sources that are meant to be heard in the auditorium are from the sources as follows.

Wall Speaker

Ceilling Speaker (A)

A

Ground Speaker (B)

A

B

B

*Unmarked soundsources are wall speaker

- 20 -

NOISE Source

2

2

2

2

2

1

1 3

1

1

2

2

2

- 21 -

1 2 3

Level of dB during idle and operating

21dB

21dB 27dB

43dB

dB Level Chart

Idle

Noise Level (dB)(A)

Common Indoor Sound Level

Plane Taking off

110

Rock Band

Lawnmower

100

Noisy Urban Daytime

90

Food Blender

80

Shouting

70

Vacuum Cleaner

60

Normal Speech

Quiet Urban Daytime

50

Quiet Urban Nighttime

40

Quiet Rural Nighttime

30

Large Business Office Quiet Theater, Conference Room Library

20

QuietConcert Hall

10

Brocast & Recording Studio

Commercial Area

73dB

73dB 69dB

Threshold of hearing

84dB 34dB

Common Indoor Sound Level

34dB

Operating

- 22 -

0

Buffer zone Entrance area and void spaces isolate the auditorium from unwanted outside noises.

- 23 -

Bufferzone of the auditorium.

5. SOUND PATH

Sound Path

Sound path is the traversing of the sound wave from a source that is travelling perpendicular and in a straight line within the space. The geometric acoustics where the individual assumed the dimension of a room is large compared to the wavelength of sound then one may treat the sound waves in the room in much the same way as light rays are treated in geometrical optics.

- 26 -

The auditorium ceiling is mutifaced in order to create more sound reflection and dispersion. The sound from the stage is reflected off from the ceiling and dispersed into the auditorium seating below.

The back wall of the stage is covered by a large curtain to prevent sound waves from reflecting on the hard surface of the wall behind it, thus preventing the people on stage from hearing echoes of thier own performances or speeches.

When a loud sound is made from the center of the stage, there is a echo coming from the auditorium.

The echo is produced by the exterior of the control room, which is made of wood that reflects the sound waves.

There is a sound shadow located behind the auditorium’s control room.

- 27 -

6. CONCLUSION The MAA Auditorium is a hall used for multiple types of events ranging from speeches to orchestras. But from the design of the auditorium, ecessive use of acoustic panel around the walls resulted the low reverberation time of the auditorium, making the auditorium less ideal compare to its intended usage it seems that it is best used as a speech auditorium.

Moreover it doesnt have many devices on the walls to increase the reflection and dispersion of sound, but the walls are padded to dampen the sound and isolate it, which is best for a speech oriented auditorum.

- 28 -

7. REFERENCE • Hilda, F. (1970, January 01). Malaysia Airlines Academy (MAS Academy).

Retrieved May 01, 2017, from http://fhildagreat.blogspot.my/2012/11/malaysia-airlines-academy-mas-academy.html • JOURNEYS FILLED WITH THE RICHNESS OF MALAYSIA. (n.d.). Retrieved May 01, 2017, from https://www.malaysiaairlines.com/ • 43rd Annual General Meeting Malaysian Airline System Berhad [PDF]. (2014, June 25). Malaysian Airline System Berhad.

• PUSPADEVI, S. (2012, March 04). Carnatic vocalist Arun wows the crowd at fundraising concert - Community. Retrieved May 01, 2017, from http:// www.thestar.com.my/news/community/2012/03/05/carnatic-vocalistarun-wows-the-crowd-at-fundraising-concert/ • Grondzik, W. T., & Kwok, A. G. (2015). Mechanical and electrical equipment for buildings. Hoboken, NJ: Wiley.

- 29 -