auditorium design with acoustic treatment implimentation

1. Auditorium design
Auditorium Design Architectural Science - Acoustic
Feb 2024 G.C
Group Members
Abdelah Biya
Amanuel Solomon
Habib Misbah
Yosef Bekele
Architectural Science - Acoustic
Auditorium Design

2. SIte
PLAN
Auditorium Design Architectural Science - Acoustic
Abdelah Biya
Site plan

3. External noise
Analysis
23 m²
SECURITY
ROOM
212 m²
Work Shop
18 m²
STORE
9 m²
TOILET
62 m²
FEMALE
DRESSING
30 m²
DRESSING
66 m²
MALE
DRESSING
11 m²
TOILET
21 m²
ELECTRICAL
221 m²
REHARSAL
54 m²
STAFF CAFE
30 m²
OFFICE
35 m²
OFFICE
47 m²
SECURITY
153 m²
BACK
STAGE
331 m²
STAGE
AUDITORIUM
15 m²
UNI-SEX
43 m²
KITCHEN
42 m²
KITCHEN
100.61°
60.20°
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45 m²
SECURITY
106 m²
dj
stand/controll
58 m²
waiting
10 m²
toilet
10 m²
toilet
2069 m²
Outdoor noise Source
- Multiple noise sources are found outside the
auditorium which include the high traffic
movement from the side Ayer tena Taxi
terminal increases the noise level that affecting
the audience inside. Even if we had buffering
plants for the areal sound from the terminal and
line sound source from the traffic. the sound
generated by opening and closing of the door
and continuous noise sources produced by the
people at the waiting area.
- The noise might enters the auditorium through
the doors due to this we need to enter sound
proofing treatments at the ground floor
entrance.
- At the first floor entrance banging sound of
the doors.
- Other than the lobby and cafteria area, the
two exit doors located at the right side and left
of the auditorium also increases the noise level
entering the auditorium.
- The seats near to the back exit and the side
exits are affected and exposed by noise
disturbance that enters through the doors from
the outside of the auditorium.
The high concentration of
people gather at the caftreria
area increases the noise level
that affecting the audience at
the back seating inside.
The high traffic movement from the side
Ayer tena Taxi terminal increases the noise
level that affecting the audience inside.
Even if we had buffering plants for the areal
sound from the terminal and line sound
source from the traffic.
Noise produced by
opening and shutting of
the doors
AUDITORIUM
Ayertena Taxi Terminal
Ayertena road
high level
of noise
moderate level
of noise
low level
of noise
Auditorium Design Architectural Science - Acoustic
Yosef Bekele

4. 23 m²
SECURITY
ROOM
212 m²
Work Shop
18 m²
STORE
9 m²
TOILET
62 m²
FEMALE
DRESSING
30 m²
DRESSING
66 m²
MALE
DRESSING
11 m²
TOILET
21 m²
ELECTRICAL
221 m²
REHARSAL
54 m²
STAFF CAFE
30 m²
OFFICE
35 m²
OFFICE
47 m²
SECURITY
153 m²
BACK
STAGE
331 m²
STAGE
2069 m²
AUDITERIUM
15 m²
UNI-SEX
43 m²
KITCHEN
42 m²
KITCHEN
100.61°
60.20°
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45 m²
SECURITY
106 m²
dj
stand/controll
58 m²
waiting
10 m²
toilet
10 m²
toilet
Indoor noise Source
Acoustic
treatment Goals
Acoustic
Techniques
- Several internal noise sources have been identified
inside the auditorium. The continuous noise comes from
the air conditioner diffusers and ducting system which are
located within the interior spaces of auditorium which
include the backstage, above the stage, the area under
the balcony, the edge of the balcony and the first floor
ceiling.
- Under the balcony and the first floor ceiling area, linear
air conditioning diffuser system runs along the gaps of the
suspended ceiling which causes a disrupting sound of
forced air.
- The act of opening and shutting the doors located
along the side of the auditorium and around the balcony
generates a temporary noise disturbance.
Auditorium Design Architectural Science - Acoustic
Yosef Bekele
To ensure an immersive and engaging experience
for both performers and audience members, the
main acoustic treatment goals:
1. Reduce unwanted reverberation: Minimize
echo and sound bounce to ensure speech and
music are clear and understandable throughout
the space.
2. Control background noise: Mitigate external like
the noise from the terminal, cafteria and internal
noise sources like HVAC systems and audience
movement to prevent them from masking the
desired sound.
3. Optimize direct sound: Ensure the direct sound
from the stage reaches the audience with
minimal obstruction or distortion.
To meet the acoustic treatment goals we
introduce different acoustic techniques
to addres each goals:
Absorption panels: on walls, ceilings, and
behind the stage.
Carpeting: for thick carpeting in aisles and
walkways.
Upholstered seating: with sound- absorbing
materials in the backrest and under the seats
Soundproofing: Isolate noisy areas like HVAC
systems and exterior walls with soundproof
materials.
Seating layout: a fan-shaped layout with
minimal obstructions between the stage and
audience.
Stage geometry: Implementing a
sound-reflective canopy above the stage to
direct sound towards the audience.

5. Floor
Plan
23 m²
SECURITY
ROOM
212 m²
Work Shop
18 m²
STORE
9 m²
TOILET
62 m²
FEMALE
DRESSING
30 m²
DRESSING
66 m²
MALE
DRESSING
11 m²
TOILET
21 m²
ELECTRICAL
221 m²
REHARSAL
54 m²
STAFF CAFE
30 m²
OFFICE
35 m²
OFFICE
47 m²
SECURITY
153 m²
BACK
STAGE
331 m²
STAGE
2069 m²
AUDITERIUM
15 m²
UNI-SEX
43 m²
KITCHEN
42 m²
KITCHEN
100.61°
60.20°
-
---
-
---
-
---
45 m²
SECURITY
106 m²
dj
stand/controll
58 m²
waiting
10 m²
toilet
10 m²
toilet
Auditorium Design Architectural Science - Acoustic
Amanuel Solomon
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Ground Floor First Floor

6. Reflectors Absorbers Sound reflection pattern Sound Reinforcements
Sound absorption materials, such as
acoustic panels and ceiling are
placed to minimize excessive
reverberation, ensuring clear and
intelligible speech and music.
Reflection control involves
strategically positioned surfaces, such
as angled walls or diffusers, to
enhance the distribution of sound and
prevent unwanted echoes.
For sound reinforcement, advanced
audio systems are integrated,
including strategically placed
speakers. These components work
together to amplify and distribute
sound evenly throughout the space,
catering to the specific needs of
different events, such as lectures,
concerts, or theatrical performances.
The overall design aims to provide a
balanced and immersive auditory
experience for both performers and
audience members.
Floor Plan
Acoustic Treatment
Auditorium Design Architectural Science - Acoustic
Abdelah Biya

7. Auditorium Design Architectural Science - Acoustic
Material
Selection
porous ceiling panel
Thick carpeted flooring
contributes to sound absorption.
Carpet is an outstanding sound
absorber which serves as an
acoustical aid, as well as a floor
cover. Carpet absorbs airborne
noise as efficiently as other
specialised acoustical materials.
Habib Misbah

8. Auditorium Design Architectural Science - Acoustic
Section Amannuel Sollomon And Reverbration Time Abdelah Biya
REVERBERATION TIME CALCULATION
Reflective
Wall panels
Diffusive Absorptive
Sound Reinforcements
Reverbration time = 0.16 x V / Total absorption
Auditoriums designed for a variety of events, including
music, spoken word, and audio-visual presentations,
may aim for a balanced reverberation time (around
1.5 to 2 seconds) to accommodate a range of activi-
ties.
0.16 x 10400 /946 1.75 sec
Reverbration time
and Acoustic Treatment
Total floor area - 1300 sq. m
Total wall area - 720 sq. m
Total door area - 3.8 sq. m x 2 = 7.6 sq. m
Total ceiling area - 1300 sq. m
Volume - 1300 x 8 = 10400 cubic meter
carpet - (0.3)
Acoustic wall panel - 0.5
timber - 0.14
porous ceiling panel - 0.15
390
360
1
195
Area Material Coefficient Total absorption

9. Auditorium Design Architectural Science - Acoustic
Habib Misbah
3D exploaded view
and render