HHS should treat low-frequency magnetic emissions from televisions and monitors as an exposure, children's programming first. RF limits rest on heating, specific absorption rate, and power density. They do not describe image-driven magnetic pulses in the band that overlaps the electroencephalogram. A set can meet a heating limit and still emit them. Airborne-speaker limits below 20 Hz answer a different question: magnetic fields pass through tissue and do not depend on a speaker cutoff. The source is the display and its electronics, driven by ordinary programs. The field comes from image-intensity changes, power circuitry, and, on older tubes, deflection. Meet the Teletubbies (1:01:43): a soundtrack spectrogram from 0 to 100 Hz, aligned with the picture, showed intermittent and at times dense energy below 50 Hz and below 20 Hz. The strongest sustained cluster below 20 Hz was near minutes 51-54, in insert and outdoor segments. The study does not establish intent or a neurological effect. It is a case for measuring the magnetic field at the set, not only the audio file. FCC RF rules and the IEEE and ICNIRP guidelines center on heating, SAR, and power density. A pulsed field near 1/2 Hz, 2.4 Hz, or the 6-20 Hz calcium window is a different quantity. Public Notice FCC 74-78, 44 FCC 2d 1016 (Jan. 24, 1974), at 47 CFR 73.4250, calls subliminal broadcasts contrary to the public interest whether or not they work, because they are meant to deceive. That covers a hidden message, not a measurement of the receiver's field. 5(n)-(p). Measure time-resolved flux density at stated distances so picture-locked pulses show, and disclose it first for children's programs. Nothing routine asks whether program and display together make pulses in the lab and patent bands. A spectrogram or a heating calculation will not. Sort by frequency, field strength, modulation, pulse pattern, and duty cycle. Distance, daily hours, and years of viewing are what accumulate. SAR and power density miss the field. Adey circle, excised brain, not a child watching television. In chick and cat cerebral tissue, a weak electric sine at 6 and 16 Hz cut calcium efflux about 12-15% in a narrow amplitude…
Read the full comment →