The document analyzes the acoustic and lighting performance of a space before and after a rehearsal. For acoustics, it measures reverberation times in different zones and calculates the total sound absorption of materials used. It finds that materials were chosen to create a harmonic acoustic environment while allowing sounds from the stage to be heard clearly. For lighting, it measures daylight factors in different zones and compares existing and required numbers of fixtures. It concludes that while natural light provides substantial lighting, artificial lights are insufficient in the evening and the space appears dim.

1. ACOUSTIC ANALYSIS
Before
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 (𝒎 𝟐) Acoustic
Absorption
Coefficient
Area x Absorption
Coefficient
Perforated panel 156.44 m² 0.15 23.47
Materials (Ceiling
and flooring)
Area (𝒎 𝟐) Acoustic
Absorption
Coefficient
Area x Absorption
Coefficient
Timber flooring 95.16 m² 0.10 9.52
Perforated 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 (𝒎 𝟐) 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 (𝒎 𝟐) 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 (𝒎 𝟐) 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 0.46 202.9
Total 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.

2. 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