Results 271 to 280 of about 593,834 (310)
Some of the next articles are maybe not open access.

Very Low Frequency Noise at Brisbane

Nature, 1962
MEASUREMENTS of the broad-band component of ionospherics in the 5 kc./s. region, 'Very low frequency noise', have been reported by Aarons, Ellis and Dowden1-3.
Brown H.E., Cairns G.G.
openaire   +3 more sources

An ultralow noise preamplifier for low frequency noise measurements

Review of Scientific Instruments, 2009
Low frequency noise measurements are among the most sensitive tools for the investigation of the quality and of the reliability of semiconductor devices. The sensitivity that can be obtained depends on the background noise of the low noise preamplifier coupled to the device under test (DUT) that, at very low frequencies, is dominated by flicker noise ...
CANNATA', GIANLUCA   +2 more
openaire   +2 more sources

Measurement uncertainty in the presence of low-frequency noise

IEEE Transactions on Instrumentation and Measurement, 2001
We discuss the measurement uncertainty in the presence of different types of fundamental noise processes, especially 1/f noise. The treatment is based on the Allan variance of an n-sample average with two deadtime parameters relevant in metrology. Some results applicable to situations that are common in metrology, e.g., international comparisons, are ...
Seppä, Heikki, Helistö, Panu
openaire   +1 more source

Drift and low frequency noise

Radio and Electronic Engineer, 1971
To compare errors arising in a measuring instrument from drift and low frequency (1/f) noise, the behaviour of the latter in the time domain is calculated. The standard deviation is expressed in terms of the cut-off frequency and integration time of the instrument, and the frequency index of the noise, which can be measured at audio frequencies ...
G.G. Bloodworth, R.J. Hawkins
openaire   +1 more source

Low-Frequency Noise in GaAs

Japanese Journal of Applied Physics, 1990
Low-frequency noise measurements were carried out on GaAs devices in the frequency and temperature ranges from 10 Hz to 100 kHz, and from 77 K to 300 K, respectively. The noise spectra are considered to be superpositions of generation-recombination noise components caused by traps.
Shiyuan Yang   +2 more
openaire   +1 more source

Low-frequency noise thresholds

Journal of Sound and Vibration, 1969
Abstract The absolute threshold of hearing for octave bands of noise with centre frequencies from 125 to 4 Hz has been determined. The results show that the noise threshold behaves in a similar fashion to the tone threshold, but below 32 Hz noise thresholds are more sensitive by a small but significant amount. A hypothesis is advanced that from about
N.S. Yeowart, M.E. Bryan, W. Tempest
openaire   +1 more source

Low-frequency noise fields

The Journal of the Acoustical Society of America, 1986
Since the classic paper of Wenz [J. Acoust. Soc. Am. 34, 1936 (1962)], ambient noise has been an extensively studied phenomena. Morris [SIO Ref. 75-34, MPL/Scripps (1975)] emphasized the importance of ships as their signals are enhanced when they cross over seamounts or proceed over the continential slopes. Wagstaff [J. Acoust. Soc. Am. 69, 1009 (1981)]
W. M. Carey, R. A. Wagstaff
openaire   +1 more source

Low-Frequency Growth Noise

Europhysics Letters (EPL), 1986
At the nucleation stage of phase transformation, the number of critical nuclei is slowly fluctuating, which should lead to a characteristic, electrically detectable, low-f noise. Observation of this noise, which has a well-defined cut-off would provide an internal kinetic test of classical nucleation models.
openaire   +1 more source

Low-Frequency Variance Noise

Journal of Applied Physics, 1970
Variance fluctuations in 1/f noise examined with apparatus capable of responding to zero frequency signals are found to have the same magnitude as those in band-limited 1/f noise signals. The distribution of variances in identical sample lengths is skewed to small values in the case of current noise in a carbon resistor and is symmetrical in the case ...
openaire   +1 more source

Home - About - Disclaimer - Privacy