Abstract
MOST mains-actuated radio receivers when switched on have a greater or lesser degree of mains hum, which is readily audible so long as the programme is inaudible. With my own receiver I have always been conscious of a rhythmic pulsation in intensity under these conditions, which I have been inclined to attribute to some slight lack of balance in the electrical components of the set. On inquiry, I find that many people are aware of this rhythmic effect.
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References
de Vries, H., Nature, 161, 63 (1948).
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LAWSON, R. Aural Sensitivity and Heart Beats. Nature 162, 782–783 (1948). https://doi.org/10.1038/162782b0
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DOI: https://doi.org/10.1038/162782b0
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