重量床衝撃音遮断性能測定方法における加振力特性に関する研究

抄録

To develop the method of measuring sound insulation of building floors against heavy and soft impacts, a working group was set up in the Architectural Institute of Japan (AIJ). As the first experimental study, various kinds of impact sources such as a bang-machine, rubber balls, automobile tires were examined in field tests. Based on the results, nine rubber balls of different impact characteristics were made on trial base, and field measurements were performed by using them in several buildings of different construction. From the experimental results, one rubber ball impact source of 10ms impact time was chosen. To examine the manufacturing technology of the rubber ball, thirty one balls were made in three different production lot in different seasons. As a result, a fairly good reproducibility in manufacturing has been found. Using these standard rubber balls, inter-laboratory tests were carried out among forty acoustic laboratories in Japan. This paper describes the outline of these works.