Transformer audio noise problems

PRIOR TO THE LAST WAR the general public was becoming noise conscious and was insistent that all types of objectionable noises be eliminated. Power companies in the metropolitan area were mostly concerned with the noise emitted by transformers of the distribution size since, in a number of cases, these transformers were installed in inhabited areas. The public had not yet begun to complain of the noise emitted by induction equipment installed in the generating station. In many cases, the generating stations and the larger substations still had room for expansion so that housing was fairly remote from them. In other cases, these stations were located in nonresidential neighborhoods.