This sound is special due to the extremely low frequencies of it.

The currents are extremely low frequency and travel over large areas at or near the surface of Earth.

Generating extremely low frequency waves in the 0.1 Hz range.

It is in the hours following the great solar perturbations that the behaviour of extremely low frequency waves becomes very abnormal.

Omega stations used very extensive antennas to transmit their extremely low frequencies.

Home bases can then use extremely low frequency radio signals, able to penetrate the ocean's surface, to reach submarines wherever they might be.

They can hear in extremely low frequencies far beneath what humans can detect, down to something like 13 octaves below middle C on the piano.

The earth is continuously vibrating, although at extremely low frequencies (on the order of once every couple of hundred seconds or so) and amplitudes.

Scientists hypothesized that exposure to extremely low frequency magnetic fields may increase breast cancer risk by affecting melatonin production (1).

He transmitted extremely low frequencies through the ground as well as between the earth's surface and the Kennelly-Heaviside layer.

Instead they are mechanically linked to a woofer that is driven by an inaudible, extremely low frequency electrical signal.

The technique is not particularly precise but it will measure any waveform at any frequency (except for extremely low frequencies).

"It's an acronym for Extremely Low Frequency radio waves.

However, monitors also produce a different kind of radiation at extremely low frequency, or ELF, which is commonly associated with power lines.

If necessary, she could still be reached by the relatively new, albeit slow, ELF, or extremely low frequency, band of communications.

Other dosimeters, like extremely low frequency dosimeters which measure exposure to radiation from electric power lines, also exist.

Most speakers don't have the frequency response to handle these extremely low frequencies, so a separate subwoofer, specifically designed to reproduce these sounds, makes sense.

Most of the molecules in the human body interact weakly with electromagnetic fields in the radiofrequency or extremely low frequency bands.

Sixty-hertz fields fall into what is called the extremely low frequency (E.L.F.) range of the electromagnetic spectrum.

ELF: Extremely Low Frequency, a method of communicating with submarines at sea.

At the opposite extreme of a pulse of extremely long duration, the Fourier spectrum only contains extremely low frequencies.

Extremely low frequency (ELF) is the range of radiation frequencies from 3 to 30 Hz.

He imagined a system specifically for medium-accuracy global navigation, and thus selected the extremely low frequency of 10 kHz as the basis for the signal.

Haplogroup G2a1 has an extremely low frequency in almost all populations except in the area of the Caucasus Mountains.

Becker believed that extrasensory perception could occur from extremely low frequency (ELF) waves.