CONNEXION CONFERENCE & EVENT CENTRE 7, Jalan Kerinchi, Bangsar South City, 59200 Kuala Lumpur, Malaysia
WHAT IS IT USED FOR ? mostly speech
Their ballrooms and meeting rooms are popular because of the exibility of their space. They have a state of the art Auditorium that comes with a top class AV system and a three tier seating arrangement Annual General Meeting (AGM), Business Presentation, Concert, Conference, Convention, Press Conference, Product Launch, Product Talk, Seminar, Training Session
METHODOLOGY
Bosch GLM 100 Digital Laser Measuring Device Taking measurement of the space to produce accurate drawings and analysis.
Pocket measuring tape
Sound Level Meter
Smartphone
Measuring the details to produce accurate drawings and analysis.
To access background noise sound concentration and intensity.
Playing videos providing a constant tune.
ANALYSIS
3.1 Auditorium Design 3.2 Sound Propagation 3.3 Sound Reinforcement 3.4 Noise Intrusion 3.5 Reverberation Time
AUDITORIUM DESIGN
FORM CURVILINEAR FORM = POOR ACOUSTICAL DESIGN CONCAVE WALL CONCENTRATE REFLECTED SOUND
CONCENTRATION IN THE CENTRE OF THE AUDITORIUM
AUDITORIUM DESIGN
STAGE LEVELLING
ELEVATED AUDIENCE SEATINGS = SOUND UNINTERRUPTED BY OBJECTS
SOUND DISTRIBUTED MORE EVENLY
AUDITORIUM DESIGN
SEATING ARRANGEMENT 298 SEATS CAPACITY FANNED OUT CONFIGURATION AT 140°
ALL SEATS HAVE AN OPTIMUM VIEW + PROPER SOUND COVERAGE
AUDITORIUM DESIGN
HOUSE MATERIALS : SOUND ABSORBENT
Acoustic Fabric
Medium Pile Carpet
Upholstery Fabric
Thin Carpet
Heavy Velour Curtain
AUDITORIUM DESIGN
HOUSE MATERIALS : SOUND REFLECTIVE
Acoustic Fabric
Gypsum Plasterboard Ceiling
Timber Veneer
Tinted Glass
Steel Railings
AUDITORIUM DESIGN
STAGE MATERIAL Sound Absorbent Materials
Heavy Velour Curtain
Sound Reflective Materials
Acoustic Fabric
Timber Parquet Flooring
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Acoustic Panels
-
Outer fabric layer act as high frequency sound reflector Air gap act as low frequency sound absorber
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Medium Pile Carpet
-
To absorb airborne sound Reduce impact sound on the floor
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Stage
-
Sound reflection occurs between hard surfaces Sound energy loss due to reflected multiple times in between hard objects
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Thin Carpet in Control Room
-
Sound absorbance of thin carpet is not strong enough STC value of both combination of glass and wall is high. Sound energy do not escape from control room
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Upholstered Tip-Up Seatings
-
-
Sound absorption coefficient of the chair is equivalent to an average person The RT in the auditorium remains constant whether the capacity of the hall is partially or fully filled
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Heavyweight Velour Curtain
-
The highly porous material act as thousands of tiny sound traps
-
The pleating is able to expose more sound-absorbing surface, thus increasing effective surface area and improving low frequency sound attenuation.
AUDITORIUM DESIGN
ACOUSTIC TREATMENT MATERIAL Gypsum Plaster Ceiling
-
High stiffness and hard surface This contributes to its low sound absorption coefficient, making it a good sound reflector.
SOUND PROPAGATION
46.1
46.2
41.55
SOUND PROPAGATION
47.3
38.2
44.7
SOUND CONCENTRATION
48.45
35.85
45.65
52.75
53.75
46.6
CONCENTRATION IN THE CENTRE OF THE AUDITORIUM
NOT OBSERVED
DUE TO ACOUSTIC PANELS LOW FREQUENCY SOUND ABSORBER HIGH FREQUENCY SOUND REFLECTOR
CONCAVE WALL TENDS TO
LOW FREQUENCY SOUND ABSORBER
HIGH FREQUENCY SOUND REFLECTOR
CONVERGE REFLECTED SOUND
REDUCE IMPACT OF SOUND CONCENTRATION
SOUND INTENSITY HIGHER IMMEDIATELY OFF THE REFLECTIVE SURFACE
46.1
46.2
41.55
47.3
38.2
44.7
48.45
35.85
45.65
52.75
53.75
46.6
SOUND PROPAGATION
SOUND ATTENUATION TOWARDS THE BACK OF AUDITORIUM ANOMALY DUE TO SOUND REFLECTION
SOUND PROPAGATION
SOUND REFLECTION
GYPSUM PLASTER CEILINGS TILTING OF CEILING = EFFECTIVE CEILING DESIGN
EFFECTIVELY REFLECTS THE SOUND TO THE BACK OF THE AUDITORIUM
C B Direct Sound Sound Reflection
A
SOUND PROPAGATION
SOUND REFLECTION HIGHER SIL MEASUREMENT THAN POSITION A DUE TO
EFFECTIVE CEILING REFLECTION
46.1
47.3
48.45
52.75
46.2
C
41.55
38.2
B
44.7
35.85
A
45.65
53.75
46.6
SOUND PROPAGATION
SOUND REFLECTION
TIMBER AND GLASS PANEL
REFLECTS SOUND BACK TO THE SEATINGS
C B
Direct Sound Sound Reflection
A
SOUND PROPAGATION
SOUND REFLECTION HIGHER SIL MEASUREMENT THAN POSITION B DUE TO
EFFECTIVE WALL REFLECTION
46.2 46.1
47.3
48.45
52.75
C
41.55
B
44.7
38.2
35.85
A
53.75
45.65
46.6
SOUND PROPAGATION
R2
R1
SOUND DELAY & ECHO D
19.09 m/s
R2
FOR SPEECH SOUND DELAY < 40 m/s
= NO ECHO
R1
D
8.88 m/s
R2 R1
D
3.91 m/s
SOUND PROPAGATION
FLUTTER ECHO
PARALLEL WALL ONLY AT FRONT PART OF STAGE
INSIGNIFICANT FLUTTER ECHO
NON PARALLEL ALIGNMENT OF CEILING TO FLOOR
NO FLUTTER ECHO
SOUND REINFORCEMENT FULL RANGE SPEAKERS & AMPLIFIERS
INSTALLATION OF LOUDSPEAKER SYSTEM
EVENLY DISTRIBUTE SOUND 2-WAY CEILING SPEAKERS
NOISE INTRUSION
INTERNAL NOISE : movement & activity of users DOOR SLAM STOPPER
TIMBER STAIRCASE
AUDITORIUM CHAIRS
NOISE INTRUSION
INTERNAL NOISE : mechanical & electrical service
AIR CONDITIONING
SPEAKERS + VENTILATION DUCTS
FORMING BACKGROUND NOISE
NOISE CONTROL
internal noise control: SOUND ABSORPTION MEDIUM PILE CARPET
ACOUSTIC FABRIC
UPHOLSTERY FABRIC
VELOUR CURTAIN & ACOUSTIC FABRIC
NOISE INTRUSION
EXTERNAL NOISE : vehicular & human
VEHICULAR NOISES
HUMAN NOISES
located next to the drop off of the building and facing main road
people can be heard talking outside at the waiting area/reception area
NOISE CONTROL
external noise control: SOUND LOCK
SIDE ENTRANCE OF THE AUDITORIUM
MAIN ENTRANCE OF THE AUDITORIUM
curved hallway that is connected from the back of the auditorium and leads directly to the loading bay entrance, allowing user to leave during an ongoing event without disruption
block the sound of people’s movement and interaction at the foyer and also the sound of traffic as the auditorium is located next to the main road
NOISE CONTROL
external noise control: SOUND INSULATION
200mm Concrete wall
HIGH STC OF 58
BLOCKS AIRBORNE NOISE
BACKGROUND NOISE
BACKGROUND NOISE 33.4 DB
MATCHES THE RECOMMENDED NOISE CRITERIA
NC 25
GOOD LISTENING CONDITION DUE TO EFFICIENT NOISE CONTROL
REVERBERATION TIME RT = 0.16 V / A A = 7 + 85.16 + 2.81 + 167.57 + 15.84 + 26.8 + 142.38 + 132 + 0.21 = 579.77 m² sabins The volume, V of the auditorium is 2265.14m³ Therefore, RT = 0.16(2265.14) / 579.77 = 0.625s
●
CONCLUSION
● ● ●
CCEC as a Limited Auditorium more suited for Conferences
●
● ●
Excellent interior design with minor compromise on acoustic quality Concave layout maximises capacity Convergences of sound due to the layout is resolved with use of acoustic panels Levelling and arrangement of seats maximise sound reception Careful tilting of ceilings amplifies direct sound vias reflected indirect sound and eliminates sound delay, preventing echo Selection of materials and effective sound lock minimise sound intrusion, impact noise and echo Abundant use of sound absorbent materials reduces RT, making it acoustically ‘dead’
REFERENCE Books Appleton, I. (2008). Buildings for the performing arts. 2nd ed. Oxford: Architectural, pp.65-160. Cavanaugh, W. (2009). Architectural Acoustics: Principles and Practice, 2nd Edition. John Wiley & Sons. Hardy, H. (2006). Building type basics for performing arts facilities. Hoboken, N.J.: John wiley & Sons. Raimond, J. (1934). The coefficient of differential galactic absorption. [Groningen].
Website Acousticalsolutions.com. (2019). [online] Available at: https://acousticalsolutions.com/wp-content/uploads/2015/ 01/as-studio-54-acoustic-panels-data-sheet.pdf AcousticsFREQ.com. (2019). Sound-Absorbing Drapery: Theory & Application. [online] Available at: http://acousticsfreq.com/sound-control-acoustic-curtain/
Creamer Media's Engineering News. (2019). Carpet effective, presents sound-absorption solution. [online] Available at: https://www.engineeringnews.co.za/article/carpet-effective-presents-so und-absorption-solution [Accessed 13 May 2019]. Homecarpetone.com. (2019). Why Carpets are Extremely Effective at Sound Absorption. [online] Available at: https://homecarpetone.com/blog/2013/12/6/Fuzz_Buzz_Flooring/Why_ Carpets_are_Extremely_Effective_at_Sound_Absorption/ar/18/ Lifewire. (2019). When It Comes to Your Speakers, Power Has Little to Do With Volume. [online] Available at: https://www.lifewire.com/amp-power-speaker-efficiency-3135077 [Accessed 13 May 2019]. Mbr-design-group.com. (2019). [online] Available at: http://www.mbr-design-group.com/tech/notes/NC%20Table.pdf Webb, D. (2019). First reflection, Flutter echo, Comb Filtering. [online] Webblab.sk. Available at: http://webblab.sk/home-studio/8-first-reflection-flutter-echo-comb-filterin g