1	Noise and vibration control in multiplex cinemas A. Farina¹; P. Fausti² ¹ Department of Industrial Engineering, University of Parma, Italy ² Department of Engineering, University of Ferrara, Italy
2	Topics Design and realization of a new multiplex cinema in Genoa Severe environamental conditions (industrial and trainway noise and vibrations, close to airport and docks) Strict specification in terms of acoustical and vibration control set by the customer
3	Overview
4	Overview
5	Plan
6	Detailed Plan
7	Significant Numbers 5 floors: 2 parking, 1 commercial, 1 cinema, 1 technical 14 cinema rooms, 4980 m² 1 x 499 seats, 6x216 seats, 5x143 seats, 2x322 seats = 3154 total seats Entrance and services 2838 m² Shops and restaurants: 9500 m² 18800 m² parking area (2 floors), 720 cars
8	Acoustical specifications (UCI) External walls R’w = 55 dB Internal walls R’w = 50 dB Fire-resistant walls R’w = 55 dB Wall between cinema rooms R’w = 65 dB Roof R’w = 50 dB Floor R’w = 60 dB Internal doors R’w = 45 dB Wall of the projection room R’w = 50 dB
9	Acoustical specif. (Italian Law) External walls R’w = 42 dB Internal walls R’w = 50 dB Fire-resistant walls R’w = 50 dB Wall between cinema rooms R’w = 50 dB Roof R’w = 42 dB Floor R’w = 50 dB Internal doors --- Wall of the projection room ---
10	Background noise UCI requires that the Maximum SPL with Slow time constant complies with NR-30 curve (L_max,slow < NR30) – this includes any source of noise, including passage of trains or aircrafts The Italian Law requires that the noise produced by steady-state equipment (HVAC) has an A-weighted equivalent level less than 35 dB(A) (L_A,eq < 35 dBA) The UCI requirements are much more stringent than the Italian Law
11	Vibration limits UCI requires that continuous vibrations are less than the curve 1 of BS-6472 (1992) UCI requires also that the vibrations are less than the maximum allowed for building of category 5 in DIN-4150-2 In practice, the Italian standard UNI-9614 was applied, which specifies a maximum weighted acceleration level of 71 dB
12	Technical details
13	Technical details
14	Technical details
15	Technical details
16	Vibration control
17	Preliminary measurements
18	Preliminary measurements (vibrations)
19	Realization
20	Final verification measurements
21	Final verification measurements
22	Vibration measurements
23	Vibration measurements
24	Vibration measurements
25	Vibration measurements
26	Conclusions Almost all noise and vibrations specifications were fulfilled The rubber support of horizontal structures was able to decouple vibrations above 5 Hz The multilayer walls employing triple gypsum boards gave sound insulation much higher than expected Proper soundproofing was required for reducing the HVAC noise below the NR-30 curve