Results 251 to 260 of about 11,585,015 (293)
Effects on spatial skills after exposure to low frequency noise
, 2007 Körning-Ljungberg, Jessica, +2 more
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Low frequency noise enhances cortisol among noise sensitive subjects during work performance
Life Sciences, 2002 Salivary free cortisol concentration, rated stress and annoyance were determined in 32 subjects before, during and after carrying out a battery of performance tasks for 2 hours during exposure to ventilation noise, with dominant low frequencies (low ...
Ragnar Rylander +2 more
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Sources and effects of low‐frequency noise
Journal of the Acoustical Society of America, 1996The sources of human exposure to low-frequency noise and its effects are reviewed. Low-frequency noise is common as background noise in urban environments, and as an emission from many artificial sources: road vehicles, aircraft, industrial machinery, artillery and mining explosions, and air movement machinery including wind turbines, compressors, and ...
Peter Hassmén, Birgitta Berglund
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An ultralow noise preamplifier for low frequency noise measurements
Review of Scientific Instruments, 2009Low 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
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Low-Frequency Noise of a Ballistic Rectifier
IEEE Transactions on Nanotechnology, 2014A ballistic-electron transport-based semiconductor nanorectifier, also known as a ballistic rectifier, has been demonstrated to have an intrinsic zero threshold voltage. In this paper, we characterize its low-frequency noise properties and show that the zero-threshold property enables elimination of the flicker noise. As a potential terahertz detector,
Singh, Arun K. +2 more
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Very Low Frequency Noise at Brisbane
Nature, 1962MEASUREMENTS 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.
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Measurement uncertainty in the presence of low-frequency noise
IEEE Transactions on Instrumentation and Measurement, 2001We 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
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JFET transistors for low-noise applications at low frequency
IEEE Transactions on Nuclear Science, 2003We describe a methodology to study and select JFET transistors, to be adopted for the readout of bolometric detectors, which makes use of a novel instrument capable of doing very accurate automatic noise measurements at low frequency. Clever design criteria and properly selected biasing conditions allow outstanding results in terms of noise and power ...
Arnaboldi, C +3 more
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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
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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, 1969Abstract 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
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