Research On Acoustics Design Of Digital Sand Table Exhibition Hall In Planning Museum

In the background of long reverberation,high noise and other acoustic problems in the digital sand table exhibition hall of Planning Museum,poor sound quality of the exhibition hall,and lack of a set of systematic and comprehensive s tandards for its acoustic design,this paper takes the digital sand table exhibition hall of domestic Planning Museum as the research object,studies its acoustic design strategy for the purpose,and obtains first-hand data by means of investigation and si mulation,The acoustic design strategy for the digital sand table exhibition hall is proposed,and the rationality and effectiveness of the proposed strategy are verified through the actual acoustic project.First of all,we understand the current situation of the acoustic environment of the digital sand table exhibition hall of the Planning Museum,and find that its acoustic problems still exist.Then we conduct a basic information research on it,construct a representative ideal research model,and introduce the relevant theories and requirements of the acoustic environment of the digital sand table exhibition hall,so as to provide a theoretical basis for the follow-up research;Then,the domestic exhibition halls which are consistent with the ideal research model and have acoustic design considerations are selected to analyze the specific sources and impacts of the acoustic problems in the exhibition halls by recording the acoustic design status of the exhibition halls,and combining the subjective questionnaire survey of the acoustic environment with the field measurement of noise and reverberation time;Then,according to the research results,the sound field simulation model is established by ease software,and the sound field changes of the exhibition hall before and after the same volume and different sound absorption treatment are compared;Finally,based on the results of investigation and simulation,combined with the acoustic design principles,the main technical measures for the acoustic problems of digital sand table exhibition hall are summarized,and discussed from three aspects of noise level control,reverberation time control,space organization and architectural acoustic design.The architectural acoustic environment design strategies and design methods obtained from the analysis are used to guide the actual architectural acoustic design projects,It proves the value of the following conclusions: 1)the acoustic problems of the digital sand table exhibition hall mainly include: the noise generated by the interaction between indoor air conditioning equipment and the exhibitors,the long reverberation time,the echo and the influence of the sound field of the coupling space of the exhibition hall on the sound field of the exhibition hall,which is consistent with the feelings of the exhibitors in the questionnaire survey results;2)When the background noise(empty time)limit of the exhibition hall is nr-35 and the ambient noise(except the sound reinforcement system)limit is nr-50,and the reverberation time refers to the standard of the multi-purpose hall,the subjective evaluation of the participants on the acoustic environment in the questionnaire survey is better;3)The simulation results sho w that the ideal acoustic environment of the exhibition hall can be achieved by using the sound-absorbing ceiling in the exhibition hall and the coupling space at the same time,and the sound-absorbing treatment can be carried out on the ground when necess ary.