Quiet Transformer Installations---A Problem for Both Equipment and Substation Designers

The problem of achieving quiet installations of transformers at substations is one that requires the efforts of both the equipment designer and the substation designer for successful solution. This paper describes remedial and perventive measures that have been taken by The Detroit Edison Company to solve the noise problem in substations. The most effective method that was tried was to enclose the transformers on four sides with a 12-inch masonry wall, this effecting a sound reduction of about 24 decibels. Other measures, which were less effective acoustically, also are described and data given.