Results 221 to 230 of about 70,937 (255)
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[Improving SNR (signal to noise ratio) in multichannel EEG recording].
Biomedizinische Technik. Biomedical engineering, 2003The main problem in measurements of the focal VEP (Visual Evoked Potential) is its weak SNR (Signal-to-Noise Ratio). The most common method for enhancement of the SNR is the stimulus synchronized averaging. For study of single responses other ways in SNR improvement are needed. In this contribution a new method based on space-time selective measurement
P, Husar +4 more
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Calculation of signal-to-noise ratio (SNR) of infrared detection system based on MODTRAN model
SPIE Proceedings, 2013Signal-to-noise ratio (SNR) is an important parameter of infrared detection system. SNR of infrared detection system is determined by the target infrared radiation, atmospheric transmittance, background infrared radiation and the detector noise. The infrared radiation flux in the atmosphere is determined by the selective absorption of the gas molecules,
Xue Lu, Chuang Li, Xuewu Fan
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Frontiers in Optics 2010/Laser Science XXVI, 2010
We show SNR comparisons of 4th order ghost images from PDC and 2nd order thermal images from single beams. Ghost imaging yields low background and shows improvement of the entangled light over thermal light SNR.
Barbara A. Capron +2 more
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We show SNR comparisons of 4th order ghost images from PDC and 2nd order thermal images from single beams. Ghost imaging yields low background and shows improvement of the entangled light over thermal light SNR.
Barbara A. Capron +2 more
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Signal-to-noise-ratio (SNR) of X-ray imaging scintillators determined by luminescence measurements
Applied Radiation and Isotopes, 1999A new method for studying the signal-to-noise-ratio (SNR) of X-ray imaging scintillators was developed. SNR was expressed in terms of the X-ray luminescence eAciency (XLE) the X-ray to emitted light conversion eAciency and the mean light photon energy.
D. Cavouras +4 more
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HNO, 2020
The Freiburg monosyllabic test (FBE) has been an important German speech audiometry test for years. It is nowadays also used to assess the benefit of hearing aids in noise (FBE-S). This study investigates hearing in noise using the FBE at different sound pressure levels and a signal to noise ratio of 5 dB to generate a recognition curve.In autumn 2018,
S, Guy +5 more
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The Freiburg monosyllabic test (FBE) has been an important German speech audiometry test for years. It is nowadays also used to assess the benefit of hearing aids in noise (FBE-S). This study investigates hearing in noise using the FBE at different sound pressure levels and a signal to noise ratio of 5 dB to generate a recognition curve.In autumn 2018,
S, Guy +5 more
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A deep-learning-based Signal-to-Noise Ratio (SNR) adaptive uniformity correction method
ISMRM Annual MeetingMotivation: Intensity normalization in MRI is crucial for consistent image analysis. However, naïve uniformity correction (UC) using pre-collected coil sensitivity distribution may over-compensate low-SNR regions and reduce visual quality. Goal(s): This study aims to develop an SNR-adaptive UC method to prevent over-compensation in low-SNR ...
Li Tong, Puwei Wang, Zhenkui Wang
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Analog digital converter (ADC) having improved stability and signal to noise ratio (SNR)
The Journal of the Acoustical Society of America, 2009A sigma delta (ΣΔ) analog to digital converter (ADC) that compensates for the adverse effects associated with the time delay introduced by delay circuitry of the feedback loop. This ΣΔ ADC includes a first summing stage, first integrator, second summing stage, second integrator, quantizer, and feedback loop. The second integrator has associated with it
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Signal and Information Processing Association Annual Summit and Conference (APSIPA), 2014 Asia-Pacific, 2014
For ECG signal analysis, a QRS detection algorithm is very important. The QRS detection algorithm consists of two steps, i.e., ECG preprocessing and ECG beat detection. In preprocessing step, noises in ECG signals are removed. The higher signal to noise ratio (SNR) after noise removal in preprocessing step leads to the less complicated algorithm in ...
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For ECG signal analysis, a QRS detection algorithm is very important. The QRS detection algorithm consists of two steps, i.e., ECG preprocessing and ECG beat detection. In preprocessing step, noises in ECG signals are removed. The higher signal to noise ratio (SNR) after noise removal in preprocessing step leads to the less complicated algorithm in ...
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Study of theory and experiment on signal to noise ratio (SNR) in magneto-optic disc readout system
International Conference on Optoelectronic Science and Engineering '90, 1990In magneto-optic storage, increasing of SNR in readout system is pragmatically one of the key techniques. This paper analyzes the signal and noise sources in readout system, puts forward the concept of optimum SNR, sets up analytical-function expression of SNR under the action of complex factors, and obtains some important results.
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