CINEMA SOUND ISOLATION ppt

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 " ) [...]... ACT CEILING) NC 25 NC 20 NC 15 RESULTING INTRUSIVE SOUND LEVEL (FLOATING FLOOR) 63 125 250 500 1K 2K 4K OCTAVE BAND CENTER FREQUENCIES - HERTZ 8K 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 CINEMA SOUND ISOLATION Charles M Salter Associates Inc Consultants... FRAME SOUND PRESSURE LEVEL/TRANSMISSION LOSS - DECIBELS 90 80 70 60 50 40 NC 40 30 NC 35 NC 30 20 10 0 -10 31.5 BLOCK/FRAME SINGLE FRAMERESULTING INTRUSIVE SOUND LEVEL NC 25 DOUBLE FRAMERESULTING INTRUSIVE SOUND LEVEL BLOCK/FRAMERESULTING INTRUSIVE SOUND LEVEL (BLOCK) 63 125 250 500 1K 2K 4K OCTAVE BAND CENTER FREQUENCIES - HERTZ NC 20 NC 15 8K DISCONTINUOUS ROOF SYSTEM AT DEMISING WALL VERTICAL SOUND ISOLATION. .. BAND CENTER FREQUENCIES - HERTZ 8K CINEMA FLOOR/CEILING PERFORMANCE 100 90 CONCRETE FLOOR DECK WITH 80 CONCRETE FLOOR DECK WITH RESILIENT CEILING SOUND PRESSURE LEVEL/TRANSMISSION LOSS - DECIBELS ACOUSTICAL TILE CEILING 70 60 50 40 NC 40 30 NC 35 NC 30 20 RESULTING INTRUSIVE SOUND LEVEL (SLAB W/ RESILIENT CEILING) 10 0 -10 31.5 CONCRETE FLOATING FLOOR RESULTING INTRUSIVE SOUND LEVEL (SLAB W/ ACT CEILING)... RECOMMENDATION COMPARISON 100 90 DOUBLE FRAME 80 SOUND PRESSURE LEVEL/TRANSMISSION LOSS - DECIBELS SINGLE STUD RESILIENT CHANNNEL 70 60 DOUBLE FRAME WALL TRANSMISSION LOSS BLOCK/FRAME WALL TRANSMISSION LOSS SINGLE FRAME WALL TRANSMISSION LOSS 50 40 30 20 10 0 -10 31.5 BLOCK/FRAME 63 125 250 500 1K 2K 4K OCTAVE BAND CENTER FREQUENCIES - HERTZ 8K DEMISING WALL FIELD ISOLATION PERFORMANCE-RESULTS ONLY 100 SINGLE... CONCRETE 15 mm (5 /8 ”) PLYW OOD 50 mm (2 ”) RES I I L ENT SYSTEM STRUCTURAL D ECK (150 m m (6 ”) CONCRETE) CONCRETE FLOATING FLOOR WITH STADIUM SEATING CINEMA FLOOR/CEILING PERFORMANCE 100 90 CONCRETE FLOOR DECK WITH 80 CONCRETE FLOOR DECK WITH RESILIENT CEILING SOUND PRESSURE LEVEL/TRANSMISSION LOSS - DECIBELS ACOUSTICAL TILE CEILING 100 mm (4 “) THICK FLOATING SLAB OVER STRUCTURAL SLAB TRANSMISSION LOSS . 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. 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