building services- acoustics

1. ACOUSTICS AND DESIGN OF MOVIE THEATRE

2. Acoustics is the interdisciplinary science that deals with the study
of all mechanical waves in gases, liquids, and solids including
topics such as vibration, sound, ultrasound and infrasound.
It may be defined as :-
(a) Science of sound, including its production, transmission, and
effects, including biological and psychological effects.
(b) Those qualities of a room that, together, determine its
character with respect to auditory effects.
INTRODUCTION OF ACOUSTICS

3. Importance of Acoustics
Acoustics are fundamentally important to learning environments.
Learning is intrinsically linked with communication, and aural (sound)
communication is acoustics. Large specialized rooms like
auditoriums, gyms, and cinema theaters needs careful acoustical
engineering
Architectural acoustics
Architectural acoustics (also known as building acoustics) involves
the scientific understanding of how to achieve a good sound within a
building. It typically involves the study of speech intelligibility, speech
privacy and music quality in the built environment
IMPORTANCE OF ACOUSTICS

4. It comprises of :-
a) Flooring.
b) Wall finishes.
c) Ceiling.
d) Furniture.
FLOORING
# FARRAT ISOMAT ACOUSTIC FLOATING FLOORS are used to provide very high
isolation between noisy or quiet rooms and surroundings rooms.
# They can be built as box in box systems with the walls and ceiling build off the
floating floor.
USED GLOBALLY IN ALL KINDS OF BUILDINGS
^ Excellent Acoustics and vibration isolation performance.
^ Natural frequencies down to 6Hz.
^ Acoustics air gap between 25 and 200 mm.
^ Floating concrete slab thickness between 50 and 2000mm.
^ Load bearing capacity up to 900kN/m2.
^ Ease, speed and adaptability of installation with minimal waste.
INTERIOR FINISHES

5. It offers a texture and feel which is unobtrusive, not
detracting from the appeal of other
design features around it.
- Flexibility in design, layout, acoustic and load
bearing performance.
- Flexibility in delivery.
- Supplied fully installed or as a kit for customer
installation.
- Economical.
- Use of high quality, long lifetime materials.
PRELUDE WALL FABRICS

6. WALL FINISHES
Acoustic curtains are typically made of the heavy duty, flame retardant,
acoustically absorbent fabrics and can be used with various track systems to afford
Greater flexibility than fixed sound absorptive panels.
FLEXIBLE FABRIC SYSTEM TO ABSORB SOUND
^ Typically used for recording studios, sound sets, dance etc and in venues
ranging from schools to theaters.
^ Acoustic curtains can be used to cover windows areas , to divide spaces or
arranged to cover head or reflective surfaces which allows an element of
acoustic ‘tuning’ within the room.
^ Acoustic curtains are manufactured from either wool serge or velvet velour, as
the heavier nature of these fabrics provide the best acoustic results.
^ Track selection is based on application, dependent on curtain size/weight and
arrangement .
^ Acoustic curtains are primarily intended for sound absorptive application, as
they offer minimal sound transmission loss.

7. ^ Acoustic wall curtains last in excess of 10-15 years with little maintenance. Although
Rarely required, they can be easily cleaned and repaired.
^ Acoustic wall curtains are easily the most cost effective option for a high quality,
Professional looking cinema value.
MAINTENANCE:
^ Acoustic curtain fabric can only be cleaned with a vacuum cleaner
or soft brush. Wet cleaning of flame retardant material will compromise the
fire resistance and must be avoided.
WOOL CINEMA WALL FABRICS
^ Cinema uses wool that is heavy- weight, opaque and extremely durable, in order to
Assemble the very best stage drapes, acoustic sound control curtain systems, and other
Wall curtains.
ACOUSTIC PANELS
^ Acoustic wall panels are a cost effective and attractive means of providing your venue
With the highest quality audio performance.
ACOUSTIC STRETCH FABRIC WALL
^ Covering cinema walls with acoustic stretch fabric is an alternative to the use of acoustic
Curtains to manage the sound and echo characteristics in the cinema auditorium.
CUSTOM WALL FINISHES
^ Specialty cinema can be design and install any sort of custom wall finish to give your cinema
A state of the art appearance.

8. Manufactured using optimum quality terracotta, these tiles offers resistance to
humidity, heat and superior acoustical performance.
Available in various shapes and sizes, these are readily used in
offices, multiplexes, recording studios and construction industry.
# Subtex Ebony, subtex pebble, subtex plane and subtex nubby walls and ceilings.
These products are widely used for furnishing offices, auditorium, retail outlets,
Multiplex.
# Its range is appreciated for its humidity tolerance, durability and easy access to
the plenum.
SPECIFICATIONS:
^ Surface provided with white surface finish for monolithic texture and black
surface for fully light absorption.
^ Large format – 1200mm X 1200mm.
^ Light weight - 1.5kg – 3.0kg without contributing to structural load of
building.
^ Fast track panels can be installed in T- grids after fit out (large size provide 4
tiles in 1 install).
^ High quality, high aesthetic, high NRC, ceiling tiles and panels.
CEILINGS

9. TYPES OF FURNITURE USED IN MULTIPLEX THEATRE
^ Theater seats come in a variety of widths, depending on the
age of the theater, the space available and the target audience.
^ High end theater may have luxury seating that is wider than
the cushions at your local multiplex.
^ Movie theaters may also differ from live theater spaces in
seat width.
^ Standard seat width varies between 18 and 22”,but older
theaters, such as historic movie houses from the 1940s and
earlier, may have 15 -16” seat.
IRWIN MARQUEE
IRWIN SPRINGFIELD
BASS FORUM THEATER SEAT
BLACK CANYON DESIGN
ACOUSTIC INNOVATION DESIGN
FURNITURES

10. D.T CINEMA
MEGAMALL, GURGAON
MULTIPLEX THEATRE
CASE
STUDY

11. D.T CINEMA
Located in phase-i of the dlf city gurgaon. The development has a total lettable area of
approximately 290,000 sq. Ft. And houses a 3- screen multiplex and a 15,000
Sq. Ft.
LOCATION :
Golf course road ,sector-28, gurgaon
STRUCTURE
The very modern glass structure is centrally air-conditioned with each shop having frontage
of 30 ft.
It has multiplex theatres with the seating capacity over 1000.
TECHNICAL SPECIFICATION
TOTAL BUILT UP AREA AND SITE 294,712 SQ.FT.
TOTAL FLOORS G+4
CEILING HEIGHT 12’
FULLY AIR CONDITIONED

12. PLAN

13. FRONT ELEVATION

15. VISIBILITY
•Facing the main roaad the mall definitely has a high visibility
•The frontage of the mall exceeds 200sft.
•The visibility is further augmented by signage.
SECTION ELEVATION OF PROJECTION
These ‘boxes’ are located at a much higher level as a result of the introduction of the
wall-to-wall picture and the advent of the stadium seating arrangement in
multiplexes in an attempt to provide much improved sight lines.
The projection room floor level in section in
some multiplexes is now almost above the
cedntreline of the picture .
This means the angle of incidence from the
centre of the picture to the top of the picture
line is 9 degree, whereas previously this would
be in the region of maximum 5 degrees. The
‘keystone effect’ is matigated by side black
serge masking and by the use of shaped
aperture plates .

16. SECTION DETAILS OF FLOOR
•Completely homogeneous polyster fibre body, which ensures high sound
absorbtion .
•Applicable on any surface, irrespective of finish, with special rubber backing;
Which also acts as a sonic barrier.
•Natural and earthly fibre texture with many colours.
•Eco-friendly.
ACOUSTIC STRUCTURAL
BEARINGS FOR
STRUCTURE
BOME VIBRATION
ISOLATION

17. ISOMATIC ACOUSTIC
FLOATING FLOORS
TUNED NATURAL
FREQUENCY
PERFORMANCE
VARIABLE ACOUSTIC
AIR GAP
FLEXIBILITY IN DESIGN
AND INSTALLATION
STEELWORK ANTI
VIBRATION(ACOUSTIC)
P ADS, WASHERS AND BUSHES
ISOLOATION STRIPS
FOR STAIRS
AND WALLS

18. OBSERVATION
Ceiling
-Done with grid ceiling size of 2’x2’.
-- Ss channel and phastners.
Wall finishes
-Blue fished carpet
--ply board
--rubber insulation pad
Safety product
-exit door
-Led stair nosing
-Non illuminated stair nosing
Hvac for theatre (classification of ac)
CRITICAL AREAS
(22 DEGREE APPROX)
SEMI-CRITICAL AREAS
(24 DEGREE APPROX)
NON-CRITICAL AREAS
(26 DEGREE APPROX)
THEATRES & PROJECTOR
ROOMS.
FOOD COURT, RESTUARAN-
TS, ENTERTAINMENT.
ATRIUM, LOBBIES AND
PASSAGE.

19. • A single phase supply is generally provided to the projectors and 3 phase supply to the
rectifiers.
• Lighting in the projector room is arranged so that light Is not spilled on to the screen via
the ports.
• Task lighting Is provided at each working section.
• An illumination level of 500 lux is provided in the projection room and 200 lux at bench
working level.
• the fire alarm system is in a multiplex is operated on a 3 stage basis
A-The first stage is when problem is notified to the office.
B-The second stage allows a timed interval for the problem to be investigated before the third
phase evacuation process is carried out.
C-customers are provided with an escape route to assembly point outside the premises.
• The assembly point will be provided with a 2-way communication system to the office so
that the trained designated staff can attend immediately to the person/s by taking them
downstairs in cinema locate in a multi-storey building.
• A range of fire extinguishers and fire blankets are provided in the projection room and are
located at strategic points in accordance with the fire officer’s recommendation.
ELECTRICAL INSTALLATON,LIGHTING AND FIRE
ALARM SYSTEM