earticle

영어

In the acoustic construction of the cinema theater that need both of the definition and the clarity, the acoustic engineers require the accurate estimation method of acoustic design for the proper acoustic performance. Nowaday, the some companies developed the computational simulators for the acoustic design that RAY NOISE, ODEON, CATT, EASE. In these simulator, the RAY NOISE R3.1 were useful program because it had 3D function and the interfaces. The aim of this research is the contribution for accuracy estimation work in the acoustic design through it investigate the errors between measured factors and estimations in the case of acoustic design and construction for the projection rooms, it used by RAY NOISE version 3.1. In the result of investigation, the measured factors in the A room(V 1,200㎥) were that Reverberation Time(RT₆₀) is 0.48±0.02sec, Definition(D₅₀) is 82.5%, Clarity(C₈₀) is 8±1dB, but the simulated factors were that RT₆₀ is 0.60±0.05sec, D₅₀ is 77.5±2.5%, C₈₀ is 5±2dB. The measured factors in the B room(V 300㎥) were that RT₆₀ is 0.36±0.01sec, D₅₀ is 94.7%, C₈₀ is 10±1dB, but the simulated factors were that RT₆₀ is 0.48±0.02sec, D₅₀ is 87.5±2.5%, C₈₀ is 6±2dB. The cause of the difference measuring and simulation were that the different between the input parameters and the real acoustic test parameters in the room. In conclusion, the computational simulator as RAY NOISE R3.1 occur the error of factors that RT₆₀ is +0.12sec, D₅₀ is -7.2 ~ -5.0%, C₈₀ is -4 ~ -3dB in the case of this research. Hereafter, the engineering field require the research which the change of in put parameter and the change of out put.