Acoustics project spring 2013

Metalwork rooftop Lizhu Chen | George Gizas | Ketsia Joseph | Marufa Mannan | Caroll Patino

Existing materials Name 1000HZ NRC Walls: Metal .10 .10 Seats: Concrete .03 .05

The rooftop auditorium contains concrete seating area and metal walls that is coded with yellow paint which gives a cheerful touch to the space. The space of the rooftop is all open without roof which is not acoustically efficient for people to hear. Another fact with the wall is that it is slanted that is open towards the sky and has an overhang at the front. The shape of the space is open fan that is efficient for viewing the stage.

proposed materials

Our team is proposing an enclosed space with stepped wood panel roof for acoustics that are hang from the truss. We chose wood that is reflective which used for the ceiling and part of the wall. Towards the back of the auditorium wall will be covered with an absorptive material that will absorb the sound. The stage is right under the overhang with an opaque glass that encloses the stage but leaves the space open for access to the stairs. The slanted walls are kept the way it was and it transits to straight wall for reflecting the sound. The exterior geometry of the auditorium is an enclosed box.

Name 1000HZ NRC Reflective Walls and ceiling: Wood .10 .10 Absorptive Wall: Sonex Valueline Foam 1.21

Process Sketches

Existing Condition Ray Diagram

Plan of structures: truss and 2’x 2’ wood panels.

Plan and Ray Diagram

Ray diagram for the plan

Proposed: sections and Ray Diagram

ARMSTRONG PRELUDE 15/16" EXPOSED GRID

METALWORKS VECTOR METALWORKS

PANEL

VECTOR PANEL 1/4"

9/16" 1-11/16"

15/16"

Detail Connections

Details

Absorptive

Materials

Reflective

S

FLOOR

SEATING

ɲ

A

Concrete Steel

1067 268 178

0.02 0.1 0.1

21.34 26.8 17.8

In/Outdoor Carpet Mats

310

0.2

62

FLOOR

298 sq ft

1067 sq ft

11 sq ft

SIDEWALLS

268 sq ft

Reflective Panels

BACKWALL

298

0.1

532

0.1

29.8 29.8 53.2 53.2

Absorptive Panels Absorptive Panels

565 285

1.02 1.02

576.3 290.7

Reflective Panels

2113

0.1

211.3

SIDEWALLS

298 sq ft

532 sq ft

CEILING BACKWALL

FRONT WALL Opaque Glass

167

0.1

16.7

268 sq ft

565 sq ft

AIR Volume parts

Total Volume

20340 3877(2) 3029(2) 34152 34.152

285 sq ft

CEILING 0.9 TOTAL

30.74 1419.68 sabins 268 sq ft

RT = .05 (VOLUME) A +.9V

Calculations

0.05

34152 1419.68

=

1.202 seconds

Credit Page Lizhu Chen

-----------------------------------> Sketches, booklet layout, ray diagrams, editing CAD drawings

George Gizas

-----------------------------------> Sketches, 3D model

Ketsia Joseph

-----------------------------------> Sketches, section drawings, reflective material research

Marufa Mannan -----------------------------------> Sketches, absorptive material research Caroll Patino

Credits

-----------------------------------> Sketches, calculations