Sentences with phrase «kilohertz signal»

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.

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.

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.