Sentences with word «kilohertz»

The large size of the club head compared to traditional drivers meant it radiated the 2 - 3 kilohertz range very effectively, Russell said.

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.

That was the 50 - kilohertz chirp [at a pitch far above the range of human hearing].

So while many bats will find life more difficult in a warmer world, some — those that echolocate at frequencies below 35 kilohertz in temperate ecosystems and below 95 kHz in the tropics — will find they can locate and home in on prey across a larger volume of space.

EASA suggests that a longer - range, lower - frequency 8.8 kilohertz pinger is attached to planes which regularly fly across oceans, in addition to the pingers on black boxes.

At the moment the prototype merely creates the effect on a piece of glass, vibrating it at 22 kilohertz with an amplitude of less than a micrometre.

In contrast, rat laughter comes in the form of high - frequency 50 - kilohertz ultrasonic calls, or «chirps,» that are distinct from other vocal emissions in rats.

Scientists in Spain and England tiled a platform with dozens of speakers that emitted 40 - kilohertz sound waves, beyond the range of human hearing.

But a new project called k - BELLA (k is for kilohertz) is in the works that will use the principles of combined, messy laser light sources to produce fast, more powerful laser pulses.

Each lightning network site hosts an 8 - to 12 - foot antenna that registers frequencies in the 10 kilohertz band, and sends that information to a sound card on an Internet - connected laptop.

He's shrinking kilohertz - frequency antennas — good for communicating through the ground or water — from cables thousands of meters long to palm - sized devices.

Boom Boxes Ultrasonic «boom boxes» that emit continuous high - frequency sounds from 20 to 100 kilohertz deter bats from getting too close to turbines by interfering with their echolocation.

Sonograms show the uncontaminated birds reached high notes of around 8 kilohertz while the mercury - fed birds» highest notes topped out at around 6.

«The sound had peaks in the 2 - 3 kilohertz range.

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.

Eventually we developed a standard method where we were doing everything the same and then studying the 50 - kilohertz chirps.

The newly discovered fossil katydid (Archabollus musicus) has wing structures that show it «sang» a pure tone at 6.4 kilohertz, within the human audible range, says Fernando Montealegre - Zapata at the University of Bristol, UK.

Today the picture of the radio spectrum is a color - coded colossus composed of hundreds of bands allotted by the FCC from frequencies as low as 6 kilohertz to as high as 300 gigahertz.

The upstroke of each wing beat produces a 1.3 - kilohertz low note, and the downstroke produces a 2.9 - kilohertz high note.

The team found that frequencies near 200 kilohertz were best for tracking small oil droplets like those in the Deepwater Horizon spill.

It runs at a speed of 1 kilohertz, millions of times slower than modern machines.

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.

The highest range the human ear can detect is about 20 kilohertz.

The high - pitched voice of a mouse registers at about 35 to 125 kilohertz, he said.

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).

Ultrasound consists of mechanical vibrations, like sound, but with frequencies far greater than the upper limit of human hearing, around 20 thousand to 20 million cycles per second (20 kilohertz to 20 megahertz).

«We developed a technique that allowed us to use the DMD to scan light at speeds up to 20 kilohertz, which is fast enough to see fluorescence from active neurons.»

«Once we synthesize a pulse at higher repetition rates,» says Leemans, «we will be on our way towards a kilohertz GeV laser plasma accelerator.»

The waves in the magnetic field used by the HST researchers have the same frequency range as radio waves (between 350 and 400 kilohertz).

The speaker briefly emitted an audible chirp — sweeping from 200 hertz to 10 kilohertz — and the reflections were analysed to successfully reveal the cathedral's 3D shape and the location of the sound source (PNAS, DOI: 10.1073 / pnas.1221464110).

At 24 kilohertz, the waves used are too high - pitched to be audible to humans — but can be heard by animals such as cats or bats.

Sonar systems typically move within the low - frequency range (from the kilohertz range to about two MHz).

She set up microphones at the Philippine Tarsier Sanctuary and found the animals were emitting sounds up to 75 kilohertz; humans can not hear past 20 kilohertz.

Ultrasound is sound with a frequency greater than the upper limit of human hearing, approximately 20 kilohertz (20,000 hertz).

The tunnels will actually contain two detectors operating at different frequencies which together will cover all frequencies detectable on Earth: 1 hertz to 10 kilohertz.

Your item on Jurassic katydid calls suggests that sounds at 6.4 kilohertz «can travel long distances» (11 February, p 18).

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).

This makes it possible to oscillate the grating at a frequency of up to one kilohertz and to thereby tune the wavelength of the laser source up to a thousand times per second over a very wide spectral range.

Sounds with frequencies above 1 kilohertz have wavelengths short enough to be affected by reflections but it is easier to block these wavelengths out of the headphones with sound insulation.

Then they zapped the mix with ultrasound frequencies of 205, 358, 618 and 1,071 kilohertz.

Previous observations had suggested that very - low - frequency (VLF) radio waves (from 5 to 25 kilohertz) transmitted on Earth were helping to clear particles from the inner belt.

The transmitter emits an electronic ping every minute or two at a specific sonic frequency (69 kilohertz, far above human hearing) that allows observers to follow the fish's trail.

They found that at 358 kilohertz the compound reacted faster than at any other frequency.

Measurements are made at several frequencies between 300 kilohertz and 11 megahertz.

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.

The researchers trained everyone to associate a checkerboard image with a 1 - kilohertz, 1 - second - long tone.

The speakers can generate a range of frequencies from a shrieking 4 kilohertz to an inaudible shudder of 2 hertz.

They're all in the 50 - kilohertz range, but there are many subtypes.

He claims to split water by passing low currents of around 0.5 milliamps through the cell at voltages of 20 000 volts in extremely short pulses at frequencies of between 10 and 20 kilohertz.

Researchers made the discovery after developing a special microphone array to more closely study the tunes of male mice, which range from 35 to 125 kilohertz (kz)-- far higher than the maximum frequency heard by humans (20 kz).