Sentences with phrase «signals at lower frequencies»

(Planck also records polarization signals at lower frequencies.)

Not exact matches

Although they last mere milliseconds at any single frequency, their great distances from Earth — and large quantities of intervening plasma — delay their arrival at lower frequencies, spreading the signal out over a second or more and yielding a distinctive downward - swooping «whistle» across the typical radio receiver band.

So they turned to living, anesthetized mice, attached electrodes to their scalps, and directed 2000 and 2010 hertz signals so that they produced a low - frequency, 10 hertz stimulation at the hippocampus, a deep - brain structure involved in learning and memory.

Taylor and colleagues at JPL and the California Institute of Technology in Pasadena have been studying the best way to use pulsars to detect signals from low - frequency gravitational waves.

This means that the kinds of event where LIGO can now spot gravitational waves will produce a memory signal at a frequency too low for the observatory to pick up.

At the lowest frequencies, NIOSH says, radio signals can penetrate earth.

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).

Other radio frequencies offer better options in the event of an emergency: at lower frequencies, radio signals can propagate through conductive materials like cables, pipes, power lines and wires.

The NIST team is experimenting with low - frequency magnetic radio — very low frequency (VLF) digitally modulated magnetic signals — which can travel farther through building materials, water and soil than conventional electromagnetic communications signals at higher frequencies.

Term 2 multiplies Z4s with the difference between the low - frequency signal at time t minus the low - frequency signal at time (t plus time - lag).

Thus the tree rings frequently contain a low frequency signal that is unrelated to climate or, at least, confounded with climatic effects such as temperature.

At low frequencies (< 5 GHz) where pulsar timing are typically performed at, the high - density interstellar medium in the GC can greatly smear out the pulsation signals from the pulsars, which is known as scatterinAt low frequencies (< 5 GHz) where pulsar timing are typically performed at, the high - density interstellar medium in the GC can greatly smear out the pulsation signals from the pulsars, which is known as scatterinat, the high - density interstellar medium in the GC can greatly smear out the pulsation signals from the pulsars, which is known as scattering.

Optimal filtering involves removing noise elements that have different frequencies from the signal, and this can be done by setting limits at both high and low frequencies (De Luca et al. 2010).

The LE list serves as a tool that signals the low frequency of entries at conformation shows, the potential size of a breed club and the estimated number of exhibitors and breeders.

The positive is that lower, safer frequencies at shallow depths may still show promise for shoreline swimmers, but the prospect that anyone would rush such technology to market, and possibly change signal strengths emitted - on a whim and without governance - brings up real ethical issues.

But would you conclude therefore that low - pass filtering can not improve SNR when the noise is at a much higher frequency than the signal?

This low frequency signal is strongest in the Kara Sea (where very strong ice minima occurred in 1940 and at 2000 the end of the data series studied)»

This low frequency signal is strongest in the Kara Sea (where very strong ice minima occurred in 1940 and at 2000 the end of the data series studied) and decays eastward so that in the Chukchi Sea ice cover is dominated by decadal fluctuations.

Esper wrote five or six trees at one time «produce a relatively robust estimate of the low - frequency signal».

High frequencies can not be used to predict low frequencies, something obvious when looking at signals in the Fourier Domain.

Thus the tree rings frequently contain a low frequency signal that is unrelated to climate or, at least, confounded with climatic effects such as temperature.

But it would have exactly the consequence that I said: the natural, preanthropogenic variability at the relevant time scale (decades, centuries, millennia), which is precisely related to the amplitude of the FT at this frequency, should be much lower than the observed signal.

If the signal of interest (e.g. audio) and the interfering «noise» (e.g., cell phone rf) are at sufficiently different frequencies, the «noise» can be removed by low pass filtering.

Furthermore, a study investigating parasympathetic and sympathetic activity through the use of RSA in 12 patients with BPD and 28 healthy controls had ECG recorded for three 5 min stages (at rest or stressed) found BPD was associated with lower values of RSA suggesting increased levels of sympathetic activity and decreased levels of parasympathetic activity.33 Meyer et al recorded 5 min ECG signals on 27 participants with BPD, 23 in remission from BPD, 18 suffering from PTSD and 23 healthy controls.34 Significant differences were only found between PTSD participants and controls; however, BPD participants had reduced variability across linear time and frequency domain measures compared with controls.