The acoustics of many indoor areas are today unsatisfactory, which makes it difficult to understand spoken messages as well as messages from voice alarm systems. This can result in safety problems, but also disturb the experience of the event for the visitor, since the acoustics are essential for environmental qualities regarding comfort.
The overall project aim is to increase the safety and acoustic comfort in large indoor arenas. The following goals are attained in the project:
emphasizing problems within prescribed practice and legal framework for the design of indoor areanas intending to propose cost-effective solutions for further good acoustics and audibility;
investigating and straightening prescribed legal framework considering voice alarm systems intending to propose revision with particular interest in the question of responsibility;
presenting a model for quality assurance of voice alarm systems intending to prevent inaccurate and inadequate inspection
Voice alarm systems have been studied in three Swedish indoor arenas by means of technical measurements and a completing poll. The arenas included in the project are mainly used for ice hockey but also for music and a variety of other events. The overall conclusion of the evaluated data is that the speech intelligibility is inadequate.
Results of the project are:
recommendations for acoustic design of indoor arenas
clarification of the responsibilities and emphasizing the need for governing recommendations
a proposal for an assembled methologoy concerning attestation of speech intelligibility in voice alarm systems
The target group of the research project is on one hand contractors, designers and purchasers who are active witin the field and on the other hand the authorities who manage and regulate demands, laws, standards, recommendations and responsibilities.