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Comment Primal hum of the electrical grid (Score 2, Interesting) 525

Interesting side effect of the difference in AC power frequencies between US (60 Hz) and Europe (50 Hz). I recall reading about a study that asked groups of participants to mediate and then collectively hum a tone of "primal unity"

The USian group centred on a B-flat (multiple of 60 Hz), while the Europeans centred on an A-natural (multiple of 50 Hz).

Hardly qualifies as a controlled study. But still suggestive that the background EMF frequency and device hum has some unconcious influence on the psyche?

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