Sentences with phrase «kilohertz signals»

Emanating from seas 4500 metres deep and 1600 kilometres west of Perth, the 37.5 kilohertz signals were picked up on 6 April along an arc that satellite signals had recently pinpointed as flight MH370's final, fatal route.

Throughout September, the local radio station in the Oise region to the north of Paris is overlaying its programmes with a 16 - kilohertz signal inaudible to the human ear.

Not exact matches

Dolphins can produce sound at frequencies up to 200 kilohertz — around 10 times as high as the highest pitch we can hear — and can also shift a signal's pitch or stretch it out over a long period of time.

I borrowed one that could detect signals from 100 kilohertz (kHz), just below the frequency of long - wave radio stations, up to 3 gigahertz (GHz), somewhat above the 2.4 GHz portion of the spectrum used by Wi - Fi connections (see «Radio Ways,» below).

The sensor detected digitally modulated magnetic field signals with strengths of 1 picotesla (one millionth of the Earth's magnetic field strength) and at very low frequencies, below 1 kilohertz (kHz).

But 300 times a second, a charged electrode in the MIT researchers» device alternates between a high - voltage, low - frequency (1 - kilohertz) signal and a 3.3 - volt high - frequency (200 - kilohertz) signal.