CINEMA SOUND ISOLATION ppt
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David Schwind
Tom Schindler
Charles M Salter Associates Inc
San Francisco, CA, USA
CINEMA
SOUND
ISOLATION
Consultants in Acoustics
& Audio/Visual System Design
NEW ISSUES FACING DEVELOPERS
NOISIER SITES NEXT TO RAILWAY TRACKS,
FREEWAYS, AND AIRPORTS
INCLUSION IN MIXED-USE RESIDENTIAL
AND RETAIL BUILDINGS
CINEMA AS A NOISE RECEIVER
ON-SITE NOISE (AND VIBRATION)
MEASUREMENTS
RAILWAY
-AIRBORNE NOISE, GROUND VIBRATION
-ISOLATE CINEMAS WITH RUBBER BEARINGS
ROADS
-WALLS AND DOORS TYPICALLY DOMINATE
AIRPORTS
-CEILING, WALLS, AND DOORS DOMINATE
CINEMA AS A SOUND SOURCE
FOR RESIDENCES
DO NOT LOCATE DIRECTLY ADJACENT TO
RESIDENCES
ACOUSTICAL OBJECTIVE TO PREVENT
SLEEP INTERFERENCE
THE ROLE OF SOUND ISOLATION
IN THE CINEMA PRESENTATION
SUSPENSION OF DISBELIEF
-HOLDING THE PATRON IN THE
FILM STORY
MAINTAINS THE POTENTIAL FOR THE
NOW EXCELLENT DYNAMIC RANGE OF
CINEMA AUDIO SYSTEMS
-BOTH TOP AND BOTTOM OF RANGE
CRUCIAL TO THE SUCCESSFUL
IMPLEMENTATION OF MULTI-CINEMA
INTRUSIVE SOUND SOURCES
IMPACTING CINEMAS
EXTERIOR/EXTERNAL NOISE
-TRAFFIC, AIRCRAFT, ETC.
-ADJACENT TENANTS
PATRONS IN ENTRY LOBBIES,
FOYER SOUND SYSTEMS, ELEVATORS,
AND ADJACENT CONCESSION AREAS
SOUND SYSTEMS IN
ADJACENT CINEMAS
SOUND TRANSMISSION
INCIDENT
REFLECTED
TRANSMITTED
DISSIPATED
SOURCE
BARRIER
RECEIVER
DISSIPATED
HORIZONTAL
SOUND
ISOLATION
FIBERGLASS BATT INSULATION
(3 ) LA Y ERS 1 5 mm (5/8”)
G YPSUM BOARD
(2 ) LA Y ERS 1 5 mm (5/8”)
GYPSUM BOARD ON RESILEINT
146 mm (6”) M ETAL STUD ,
600 mm (24”) O .C .
(9 -5 /8 ” )
SINGLE FRAME/RESILIENT CHANNEL DEMISING WALL
240 mm
DOUBLE FRAME DEMISING WALL
BA TT INSULATION
(1 ) LA Y ER 1 9 mm (3/4") and
(2 ) LA Y ERS 1 2 .5 mm (1/2")
GYPSUM BOARD ON EACH
OUTS IDE STUD FACE
146 mm (6")
METAL STUD , 600 mm (24") O .C .
550 mm
(2 2 " )
BLOCK/FRAME DEMISING WALL
50 m m (2 " ) S E PA RA T ION , MINIMUM
190 m m (8 " ) S O L ID CORE OR SOLID
GROUTED MASONRY
(2 ) 1 2 .5 mm (1/2") GYPSUM BOARD
BATT INSULATION
146 mm (6")
METAL STUD , 600 mm (24") O .C .
(1 ) 1 2 .5 mm (1/2") GYPSUM BOARD
480 mm
(1 9 " )
DEMISING WALLS/THX
RECOMMENDATION COMPARISON
-10
0
10
20
30
40
50
60
70
80
90
100
31.5 63 125 250 500 1K 2K 4K 8K
OCTAVE BAND CENTER FREQUENCIES - HERTZ
SOUND PRESSURE LEVEL/TRANSMISSION LOSS
- DECIBELS
BLOCK/FRAME WALL
TRANSMISSION LOSS
DOUBLE FRAME WALL
TRANSMISSION LOSS
SINGLE FRAME WALL
TRANSMISSION LOSS
SINGLE STUD
RESILIENT CHANNNEL
DOUBLE FRAME
BLOCK/FRAME
SINGLE STUD
RESILIENT CHANNNEL
DOUBLE FRAME
BLOCK/FRAME
DEMISING WALL FIELD ISOLATION
PERFORMANCE-RESULTS ONLY
-10
0
10
20
30
40
50
60
70
80
90
100
31.5 63 125 250 500 1K 2K 4K 8K
OCTAVE BAND CENTER FREQUENCIES - HERTZ
SOUND PRESSURE LEVEL/TRANSMISSION LOSS
- DECIBELS
NC 40
NC 35
NC 30
NC 25
NC 20
NC 15
BLOCK/FRAME-
RESULTING INTRUSIVE
SOUND LEVEL (BLOCK)
DOUBLE FRAME-
RESULTING INTRUSIVE
SOUND LEVEL
SINGLE FRAME-
RESULTING INTRUSIVE
SOUND LEVEL
DISCONTINUOUS ROOF SYSTEM
AT DEMISING WALL
VERTICAL
SOUND
ISOLATION
FINISH CE ILING
(N R C -0 .6 0 )
CONCRETE FLOOR DECK
WITH
ACOUSTICAL TILE CEILING
150 m m (6 ” ) F IB ERGLASS
BA TT INSULATION
CONCRETE
DECK
150 mm (6”)
CONCRETE FLOOR DECK WITH
RESILIENTLY SUSPENDED
CEILING
CONCRETE
DECK
IS O L A T O R
6" BATT
15 mm (5/8”)
GYPSUM BOARD
FINISH CE ILING
(N RC -0 .60)
IN S U L A T ION
15mm (5/8 ”)
PLYW OOD
150 mm (6”)
100mm (4”) RE INFORCED
2400 kg/m
3
(1 5 0 lb/ft
3
)
CONCRETE
15 m m (5 /8 ” ) P L YW O O D
50 mm (2”) RES ILIENT
SYSTEM
STRUCTURAL DECK
*
TYP ICA LLY - 50 mm (2”) TALL ISOLATORS
600 mm (24”) O.C . SURROUNDED WITH
16 kg/m
3
(1 lb/ft
3
) F IBERGLASS BATT INSULATION
*
(1 5 0 mm (6”) CONCRETE)
CONCRETE FLOATING FLOOR
CONCRETE FLOATING FLOOR
WITH STADIUM SEATING
19 mm (3/4”)
NEOPRENE PAD
100mm (4”) RE INFORCED
2400 kg/m
3
(1 5 0 lb/ft
3
)
CONCRETE
15 m m (5 /8 ” ) P L YW O O D
50 mm (2”) RES ILIENT
SYSTEM
STRUCTURAL DECK
(1 5 0 mm (6”) CONCRETE)
CINEMA FLOOR/CEILING
PERFORMANCE
-10
0
10
20
30
40
50
60
70
80
90
100
31.5 63 125 250 500 1K 2K 4K 8K
OCTAVE BAND CENTER FREQUENCIES - HERTZ
SOUND PRESSURE LEVEL/TRANSMISSION LOSS
- DECIBELS
NC 40
NC 35
NC 30
NC 25
NC 20
NC 15
150 mm (6”) CONCRETE SLAB WITH
ACOUSTICAL CEILING
TRANSMISSION LOSS
150 mm (6”) THICK SLAB
WITH GYPSUM BOARD CEILING-
TRANSMISSION LOSS
100 mm (4 “) THICK FLOATING SLAB
OVER STRUCTURAL SLAB
TRANSMISSION LOSS
CONCRETE FLOOR DECK WITH
ACOUSTICAL TILE CEILING
CONCRETE FLOOR DECK WITH
RESILIENT CEILING
CONCRETE FLOATING FLOOR
CINEMA FLOOR/CEILING
PERFORMANCE
-10
0
10
20
30
40
50
60
70
80
90
100
31.5 63 125 250 500 1K 2K 4K 8K
OCTAVE BAND CENTER FREQUENCIES - HERTZ
SOUND PRESSURE LEVEL/TRANSMISSION LOSS
-DECIBELS
NC 40
NC 35
NC 30
NC 25
NC 20
NC 15
CONCRETE FLOOR DECK WITH
ACOUSTICAL TILE CEILING
CONCRETE FLOOR DECK WITH
RESILIENT CEILING
CONCRETE FLOATING FLOOR
RESULTING INTRUSIVE
SOUND LEVEL (SLAB W/
RESILIENT CEILING)
RESULTING INTRUSIVE SOUND
LEVEL (FLOATING FLOOR)
RESULTING INTRUSIVE SOUND
LEVEL (SLAB W/ ACT CEILING)
SUMMARY
MEASURE SOUND LEVELS ON NOISY SITES
DEFINE THE ACOUSTICAL CRITERIA
SELECT INTER-CINEMA DOUBLE WALLS
DON’T NEGLECT VERTICAL ISOLATION
DON’T LOCATE CINEMAS DIRECTLY
ADJACENT RESIDENCES
Charles M Salter Associates Inc
Consultants in Acoustics
& Audio/Visual System Design
CINEMA
SOUND
ISOLATION
