Substations and transformer boxes eventually reduce the power to the 110 volts that toast your muffin in the morning, but the electrical noise on a high-voltage line can destroy data signals immediately.
With Internet-delivered music, Dolby's noise-reduction matters more now than in 1965, when Dolby first observed that the voltage of hiss in audiotape outmatched the music by a factor of 1, 000 to 1.