Electrical Frequency Sound From Large Transformer?

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http://forum.allaboutcircuits.com – Along this beach promenade in Thailand adjacent to a tourist/business district. There are about 6 transformers (2meters x 3meters x 4meters) along a 2 km distance. The project objective was to put power spaghetti lines underground. There is no " electrical frequency sound" around them and it looks like they have been abandoned and in disrepair. The question is : Does an operational transformer have a detectable sound ? (Embedded)