ACOUSTIC ANALYSISBefore

Rehearsal

1 2 3 4 5 6 7

A 76 76 78 63 50 77 83 Sitting Area

B 76 77 85 75 66 80 85 New Nursery 1

C 77 74 67 78 87 85 88 Stage

D 85 75 67 82 77 73 74 Robing Room

E 75 83 77 81 83 77 80 Audio Control Centre

F 66 81 73 79 75 71 75

G 71 77 71 64 70 66 70

After Rehearsal

1 2 3 4 5 6 7

A 62 55 60 67 62 54 83

B 57 63 68 56 65 66 85

C 62 66 63 53 68 67 88

D 65 60 61 63 75 70 74

E 58 58 58 61 66 69 80

F 56 64 56 71 71 69 75

G 51 62 65 66 66 64 70

Reverberation Time of Zone C ( Stage)

Materials (Wall) Area (𝒎𝟐) Acoustic

Absorption

Coefficient

Area x Absorption

Coefficient

Perforated panel 156.44 m² 0.15 23.47

Materials (Ceiling

and flooring)

Area (𝒎𝟐) Acoustic

Absorption

Coefficient

Area x Absorption

Coefficient

Timber flooring 95.16 m² 0.10 9.52Perforated ceiling

panel

95.16 m² 0.72 68.52

Total sound absorption 101.51

𝑇 =0.161 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑜𝑓 𝑍𝑜𝑛𝑒

(𝐴𝑟𝑒𝑎 𝑜𝑓 𝑆𝑢𝑟𝑓𝑎𝑐𝑒 × 𝐴𝑏𝑠𝑜𝑟𝑝𝑡𝑖𝑜𝑛 𝐶𝑜𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑡)

𝑇 =0.161 × 531.14

101.51

𝑇 = 0.84𝑠

Reverberation Time of Zone A (Sitting Area)

Materials (Wall) Area (𝒎𝟐) Acoustic Absorption

Coefficient

Area x Absorption

Coefficient

Plastered brick wall with

paint

59.1m² 0.02 1.2

Perforated acoustic

panel

135.4m² 0.15 20.2

Materials (Ceiling and

flooring)

Area (𝒎𝟐) Acoustic Absorption

Coefficient

Area x Absorption

Coefficient

Nylon carpet on

concrete floor

699.3 m² 0.14 97.9

Perforated ceiling 814.8m² 0.72 819.8

Materials (Furniture) Area (𝒎𝟐) Acoustic Absorption

Coefficient

Area x Absorption

Coefficient

Cushioned chair 286.7 m² 0.80 229.4

Timber double leaves

door

18 m² 0.15 2.7

Occupant 441 0.46 202.9Total Sound Absorption 1374.1

Total Floor Area (m²) = 699.7 m²

Volume of Zone (𝑚3) = 4575.54𝑚3

Occupancy =441Calculation:

𝑇 =0.161 × 𝑉𝑜𝑙𝑢𝑚𝑒 𝑜𝑓 𝑍𝑜𝑛𝑒

(𝐴𝑟𝑒𝑎 𝑜𝑓 𝑆𝑢𝑟𝑓𝑎𝑐𝑒 × 𝐴𝑏𝑠𝑜𝑟𝑝𝑡𝑖𝑜𝑛 𝐶𝑜𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑡)

𝑇 =0.161 × 4575.54

1374.1

𝑇 = 0.54𝑠

Building Science 2 [ARC 3413] Project 1: Lighting and Acoustic Performance Evaluation and Design.|| Mr. Sanjeh Raman

Ch’ng Xing Yue 0310425 || Elaine Bong Poh Hui 0310432 || Goh Chin Zhi 0314562 || Lau Ee Tian 0309596 || Wesley Hew Xin Han 0307585

CONCLUSION

The materials used were

chosen specifically to

create a harmonic

acoustical environment.

Acoustic panels are

attached on most surfaces

to reduce echo while

allowing sounds from the

stage to be heard clearly

by the audience.

LIGHTING ANALYSIS

Zone A (Cashier Counter Top)

Zone B (Kitchen Counter Top)

Zone C (Dining Near Window)

Zone D (Entrance)

Zone E (Dining 1)

Zone F (Kitchen)

Zone G (Dining 2)

Zone H (Dining 3)

Zone I (Dining 4)

45°

45°45°

85°

Zone Daylight Factor

(%)

A 0.05

B 0.07

C 0.1

D 0.23

E 0.09

F 0.09

G 0.07

H 0.05

I 0.09

Zone Existing (Nos. of Fixtures) Calculated (Required nos. of

Fixtures)

A 6 11

B 6 8

C 3 3

D 12 4

E 10 11

F 6 7

G 24 20

H 12 10

I 18 16

CONCLUSION

The cafeteria acts as the main entry circulation path aside

from the lobby as it is more prominent in terms of location and

its potential to perpetuate numerous human activities. As such,

the lighting within the cafeteria plays a significant role to

ensure the comfortability and perceptibility of users. From the

research, we can deduce that the multiple fenestrations along

the edges of the cafeteria provides the space with substantial

amount of natural lighting where as artificial lighting is only

partially needed to light up spaces where light is unable to

reach. From evening onwards however, the space becomes

dependent on artificial lights positioned in the cafeteria which

is not sufficient and thus may appear very dim.

Building Science 2 [ARC 3413] Project 1: Lighting and Acoustic Performance Evaluation and Design.|| Mr. Sanjeh Raman

Ch’ng Xing Yue 0310425 || Elaine Bong Poh Hui 0310432 || Goh Chin Zhi 0314562 || Lau Ee Tian 0309596 || Wesley Hew Xin Han 0307585