Results 231 to 240 of about 70,174 (264)
Some of the next articles are maybe not open access.
On the Importance of Noise Figure in Reflectivity Radars
1992The paper considers the effect of thermal noise in reflectivity meteorological radars, where the objective is to estimate the power of the backscattered signal. It studies particularly the quadratic and the logarithmic receivers.
J. M. Bioucas Dias, J. M. Nunes Leitão
openaire +1 more source
Investigation of noise reflections using test signals
The Journal of the Acoustical Society of America, 2000Repeatable test signals for use with a loudspeaker system were generated to investigate noise reflections from traffic noise barrier walls. Four classes of signals were considered: impulses, maximum-length sequences, pseudorandom binary sequences, and linear frequency-modulated sine waves or chirps. Overall, the chirps yielded the most information from
Lloyd Herman, Jeff Giesey, Jeremy Ghent
openaire +1 more source
Simulating complex noise barrier reflections
2011Within the EU FP7 QUIESST project, QUIeting the Environment for a Sustainable Surface Transport, a test method is being developed for the reflectivity of noise barriers. The method needs to account for a complex shape of barriers and the use of various types of absorbing materials.
Eerden, F.J.M. van der +2 more
openaire +1 more source
Reykjanes ambient noise reflection interferometry
2016We present results from the application of ambient noise seismic interferometry (ANSI) to data that were recorded continuously in 2014 and 2015 at Iceland’s peninsula Reykjanes. The objective of this study is the retrieval of reflected body waves (P-waves) that provide high-resolution velocity-versus-depth as well as subsurface structural information ...
Verdel,A. +9 more
openaire +3 more sources
The concept of noise revisited: some reflections on music
2007This article examines the distinction between noise and sound by following Jacques Attali’s critique which he matured in his classical work, Noise: The political economy of music. The main concern in revisiting the issue is the premise that the duality between noise and sound bears some significant implications for the difference between western and ...
openaire +2 more sources
Bosonic and fermionic white noises and the reflection process
Theoretical and Mathematical Physics, 2000zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
The effect of reflecting panels on the efficiency of railway noise barriers
The Journal of the Acoustical Society of AmericaNoise barriers containing transparent elements may suffer from a reduced shielding effect due to increased multiple reflections between vehicle and barrier. Using mostly simulations, different factors have been identified previously influencing this effect, e.g., size and position of reflecting portions.
Christian H. Kasess +3 more
openaire +2 more sources
Seismic reflection estimation with colored noise
SEG Technical Program Expanded Abstracts 1992, 1992Bjorn Ursin +2 more
openaire +1 more source
Planet Reflected Extraterrestrial Noise
IEEE Transactions on Radio Frequency Interference, 1963openaire +1 more source