Relevant bibliographies by topics / Motion noise

Academic literature on the topic 'Motion noise'

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Published: 25 May 2024

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Journal articles on the topic "Motion noise"

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KIM, J. S., and L. S. KIM. "Noise Robust Motion Refinement for Motion Compensated Noise Reduction." IEICE Transactions on Information and Systems E91-D, no. 5 (May 1, 2008): 1581–83. http://dx.doi.org/10.1093/ietisy/e91-d.5.1581.

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Kesrarat, Darun, and Vorapoj Patanavijit. "Noise resistance territorial intensity-based optical flow using inverse confidential technique on bilateral function." Bulletin of Electrical Engineering and Informatics 10, no. 6 (December 1, 2021): 3240–48. http://dx.doi.org/10.11591/eei.v10i6.3243.

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This paper presents the use of the inverse confidential technique on bilateral function with the territorial intensity-based optical flow to prove the effectiveness in noise resistance environment. In general, the image’s motion vector is coded by the technique called optical flow where the sequences of the image are used to determine the motion vector. But, the accuracy rate of the motion vector is reduced when the source of image sequences is interfered by noises. This work proved that the inverse confidential technique on bilateral function can increase the percentage of accuracy in the motion vector determination by the territorial intensity-based optical flow under the noisy environment. We performed the testing with several kinds of non-Gaussian noises at several patterns of standard image sequences by analyzing the result of the motion vector in a form of the error vector magnitude (EVM) and compared it with several noise resistance techniques in territorial intensity-based optical flow method.
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Kesrarat, Darun, and Vorapoj Patanavijit. "Noise resistance evaluation of spatial-field optical flow using modifying Lorentzian function." Bulletin of Electrical Engineering and Informatics 11, no. 5 (October 1, 2022): 2603–10. http://dx.doi.org/10.11591/eei.v11i5.3815.

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This paper presents the evaluation of the modifying Lorentzian function on the spatial-field optical flow to examine the validity in the noisy domain of motion estimation. In the routine of the motion estimation, the frame’s motion vector is estimated by the optical flow approach where the flow of the image’s frames is caught to estimate the motion vector. Nevertheless, in the noisy domain, the preciseness of the motion vector is weakened. We operated the measurement along with several non-Gaussian noises standards through several styles of the standard image frame. The determination on error vector magnitude (EVM) was taken into account to consider the preciseness of direction and length of the motion vector (MV) in comparison with various noise resistance techniques in spatial-field optical flow approach. In the achievement results, we found that this modifying Lorentzian norm function added up in the optical flow strengthen the degree of preciseness in the estimation of the spatial-field optical flow approach in the noisy domain.
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Fornasari, Simone Francesco, Deniz Ertuncay, and Giovanni Costa. "Seismic background noise levels in the Italian strong-motion network." Natural Hazards and Earth System Sciences 23, no. 10 (October 10, 2023): 3219–34. http://dx.doi.org/10.5194/nhess-23-3219-2023.

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Abstract. The Italian strong-motion network monitors the seismic activity in the region, with more than 585 stations with continuous data acquisition. In this study, we determine the background seismic noise characteristics of the network by using the data collected in 2022. We analyse the spatial and temporal characteristics of the background noise. It is found that most of the stations suffer from anthropogenic noises, since the strong-motion network is designed to capture the peak ground motions in populated areas. Hence, human activities enrich the low periods of noise. Therefore, land usage of the area where the stations are located affects the background noise levels. Stations can be noisier during the day, up to 12 dB, and during the weekday, up to 5 dB, in short periods. In long periods (≥ 5 s), accelerometric stations converge to similar noise levels and there are no significant daily or weekly changes. It is found that more than half of the stations exceed the background noise model designed for strong-motion stations in Switzerland by Cauzzi and Clinton (2013) in at least one of the calculated periods. We also develop an accelerometric seismic background noise model for periods between 0.0124 and 100 s for Italy by using the power spectral densities of the network. The model is in agreement with the background noise model developed by D’Alessandro et al. (2021) using broadband data for Italy in short periods, but in long periods there is no correlation among studies.
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Leung, Tim, and Theodore Zhao. "Multiscale Volatility Analysis for Noisy High-Frequency Prices." Risks 11, no. 7 (June 26, 2023): 117. http://dx.doi.org/10.3390/risks11070117.

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We present a multiscale analysis of the volatility of intraday prices from high-frequency data. Our multiscale framework includes a fractional Brownian motion and microstructure noise as the building blocks. The proposed noisy fractional Brownian motion model is shown to possess a variety of volatility behaviors suitable for intraday price processes. Algorithms for numerical estimation from time series observations are then introduced, with a new Hurst exponent estimator proposed for the noisy fractional Brownian motion model. Using real-world high-frequency price data for a collection of U.S. stocks and ETFs, we estimate the parameters in the noisy fractional Brownian motion and illustrate how the volatility varies over different timescales. The Hurst exponent and noise level also exhibit an intraday pattern whereby the the noise ratio tends to be higher near market close.
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Sutton, Matthew Daniel. "Motion and the Noise." JAAAS: Journal of the Austrian Association for American Studies 1, no. 2 (December 30, 2020): 317–29. http://dx.doi.org/10.47060/jaaas.v1i2.131.

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William Faulkner's dislike of unwanted sound is well documented. The acoustic environment of rural Mississippi amplified irreversibly after the introduction of the automobile, airplane, and automated farm machinery. In his Intruder in the Dust (1948), the jukebox and radio absorb pointed criticism for producing "canned" sounds outside of their "proper" environment. The narrowing gap between town square and dance hall signifies encroaching chaos, as noise drowns out the attenuated "harmony" that keeps elite whites in power and Intruder's African American protagonist Lucas Beauchamp out of the hands of the lynch mob. For Faulkner, the shift in the auditory environment presents both a disruption and an impediment to a system built on white bourgeois ideals. However, Faulkner's pessimism is counterpointed by sociological studies undertaken by Fisk University researchers. The Fisk study identifies the emergence of a blues culture in the Delta whose energy and boundary-crossing impulses illustrate the liberating possibilities of an expanding soundscape. By juxtaposing Faulkner's damning descriptions of "the motion and the noise" with the Fisk University researchers' illuminating fieldwork, this essay interprets a transformative period in the constantly shifting soundscape of the U.S. South. In line with Jacques Attali's dictum that "our music foretells our future," Intruder in the Dust anticipates the cultural upheaval that would energize the Civil Rights Movement. Both in fiction and in fact, the "noise" emanating from jukeboxes and radios in 1940s Mississippi accelerated social change at a volume much higher and a tempo much faster than Faulkner and other gradualists desired.
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Cauzzi, Carlo, and John Clinton. "A High- and Low-Noise Model for High-Quality Strong-Motion Accelerometer Stations." Earthquake Spectra 29, no. 1 (February 2013): 85–102. http://dx.doi.org/10.1193/1.4000107.

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We present reference noise models for high-quality strong-motion accelerometer installations. We use continuous accelerometer data to derive very broadband (50 Hz–100 s) high- and low-noise models. The proposed noise models are compared (1) to the broadband seismometer Peterson (1993) noise models; (2) the datalogger self-noise and background noise levels at existing Swiss and Southern California strong-motion stations; and (3) typical earthquake signals recorded in Switzerland and worldwide. The accelerometer low-noise model (ALNM) is dominated by instrument noise from the sensor and datalogger. The accelerometer high-noise model (AHNM) reflects (1) at high frequencies the acceptable site noise in urban areas, (2) at mid-periods the microseismal peaks and (3) at long periods the maximum noise observed from well-insulated sensor/datalogger systems placed in vault quality sites. This study also provides confirmation of the remarkable capability of modern strong-motion accelerometers to record low-amplitude ground motions with seismic observation quality over a broad frequency range.
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Skurowski, Przemysław, and Magdalena Pawlyta. "On the Noise Complexity in an Optical Motion Capture Facility." Sensors 19, no. 20 (October 13, 2019): 4435. http://dx.doi.org/10.3390/s19204435.

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Optical motion capture systems are state-of-the-art in motion acquisition; however, like any measurement system they are not error-free: noise is their intrinsic feature. The works so far mostly employ a simple noise model, expressing the uncertainty as a simple variance. In the work, we demonstrate that it might be not sufficient and we prove the existence of several types of noise and demonstrate how to quantify them using Allan variance. Such a knowledge is especially important for using optical motion capture to calibrate other techniques, and for applications requiring very fine quality of recording. For the automated readout of the noise coefficients, we solve the multidimensional regression problem using sophisticated metaheuristics in the exploration-exploitation scheme. We identified in the laboratory the notable contribution to the overall noise from white noise and random walk, and a minor contribution from blue noise and flicker, whereas the violet noise is absent. Besides classic types of noise we identified the presence of the correlated noises and periodic distortion. We analyzed also how the noise types scale with an increasing number of cameras. We had also the opportunity to observe the influence of camera failure on the overall performance.
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Nakadai, Kazuhiro, Taiki Tezuka, and Takami Yoshida. "Ego-Noise Suppression for Robots Based on Semi-Blind Infinite Non-Negative Matrix Factorization." Journal of Robotics and Mechatronics 29, no. 1 (February 20, 2017): 114–24. http://dx.doi.org/10.20965/jrm.2017.p0114.

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[abstFig src='/00290001/11.jpg' width='300' text='Ego-noise suppression achieves speech recognition even during motion' ] This paper addresses ego-motion noise suppression for a robot. Many ego-motion noise suppression methods use motion information such as position, velocity, and the acceleration of each joint to infer ego-motion noise. However, such inferences are not reliable, since motion information and ego-motion noise are not always correlated. We propose a new framework for ego-motion noise suppression based on single channel processing using only acoustic signals captured with a microphone. In the proposed framework, ego-motion noise features and their numbers are automatically estimated in advance from an ego-motion noise input using Infinite Non-negative Matrix Factorization (INMF), which is a non-parametric Bayesian model that does not use explicit motion information. After that, the proposed Semi-Blind INMF (SB-INMF) is applied to an input signal that consists of both the target and ego-motion noise signals. Ego-motion noise features, which are obtained with INMF, are used as inputs to the SB-INMF, and are treated as the fixed features for extracting the target signal. Finally, the target signal is extracted with SB-INMF using these newly-estimated features. The proposed framework was applied to ego-motion noise suppression on two types of humanoid robots. Experimental results showed that ego-motion noise was effectively and efficiently suppressed in terms of both signal-to-noise ratio and performance of automatic speech recognition compared to a conventional template-based ego-motion noise suppression method using motion information. Thus, the proposed method worked properly on a robot without a motion information interface.**This work is an extension of our publication “Taiki Tezuka, Takami Yoshida, Kazuhiro Nakadai: Ego-motion noise suppression for robots based on Semi-Blind Infinite Non-negative Matrix Factorization, ICRA 2014, pp.6293-6298, 2014.”
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Balachandran, G., and Praveen Kumar Gupta. "FPGA – Based Electrocardiography Signal Analysis System using (FIR) Filter." International Journal of Advance Research and Innovation 8, no. 1 (2020): 44–48. http://dx.doi.org/10.51976/ijari.812008.

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The cardiovascular attack is a more dangerous than other diseases and it is measured by ECG (Electro cardiograph) signals which is like a noisy signal in real time, especially in the field of telemedicine environment. The noisy ECG signals have more motion artifacts, electrical interference, etc. An adaptive filtering approach based on Discrete Wavelet Transform and an artificial neural network is proposed to reduce the noise in ECG signal. The quality of de-noised signal is improved by SVM algorithm. This suggested approach can successfully take out a broad scope of noise and our method achieve up to almost 82% improvement on the SNR of de-noised signals. The MATLAB simulation results shown clearly about the improvement of ECG signal with SNR value.
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Dissertations / Theses on the topic "Motion noise"

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Benton, Christopher Philip. "The perception of second order motion." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267829.

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DeMino, Kenneth William. "Shot noise approach to stochastic resonance." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/27968.

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Copeland, Andrew David 1978. "Robust motion estimation in the presence of fixed pattern noise." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87395.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
Includes bibliographical references (p. 41-42).
by Andrew David Copeland.
M.Eng.
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Topping, Christopher Leigh. "Moving object enhancement in noisy video sequences." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390839.

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梁志堅 and Chi-kin Randolph Leung. "Studies in aeroacoustics of coaxial vortex rings." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B30166068.

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Leung, Chi-kin Randolph. "Studies in aeroacoustics of coaxial vortex rings /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19003158.

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Skeen, Matthew E. (Matthew Edward). "Maximum likelihood estimation of fractional Brownian motion and Markov noise parameters." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/42527.

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Halswell, Peter K. "The vibrations of a flexible planing craft : hydroelasticity, boat motion and noise." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/378120/.

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The Royal National Lifeboat Institution (RNLI) is the charity that aims to save lives at sea. The RNLI D-class is a five metre inflatable lifeboat that is used near the shore in waves and surf. Anecdotal evidence indicates that the D-class has improved performance due to its unique, flexible, fabric structure, and this flexibility is highly likely to affect the vibrations generated by the D-class. The boat motion is experienced by the on-board crew, and the air and water borne noise are heard by the on-board crew and the wildlife. This thesis aims to measure these two types of vibration, predict the perception of these vibrations and measure the effects of hydroelasticity on both the vibration and perception. Three aspects of hydroelasticity were identified within the D-class: hydroelastic slamming, hydroelastic planing surfaces and global hydroelasticity. This gives a new perspective with which to view the effects of hydroelasticity. A four stage full-scale holistic hydroelastic experiment was performed with each stage aiming to trigger one aspect at a time. The four stages were: static tests, flat water trials, drop tests and wave trials. The D-class was fitted with 52 sensors to measure the boat motion, engine thrust, sponson and keel pressures, deck hinge angles, deck panel deflections and the fabric hull deformation. The static trials measured the shape of the D-class under only buoyancy and weight forces. The flat water trials measured the effect of a hydroelastic planing surface on the forward speed and investigated a phenomenon termed the pulsing motion. The drop tests were performed at full-scale and quasi-2D, and they measured the effect of hydroelastic slamming on the peak acceleration and predicted the Whole Body Vibration (WBV). The open-water wave trials investigated the global hydroelasticity. The static tests showed that the shape of the D-class was more dependent on the keel pressure than the sponson pressure. The flat water trials proved that a flexible planing surface decreases the forward speed by 0.44 knots. The pulsing motion surprisingly exhibited the highest forward speed and it is hypothesised that the structure achieved an unstable equilibrium position of minimal potential energy. The full-scale and quasi-2D drop tests demonstrated that hydroelasticity can affect the peak accelerations and WBV, but the trend was inverted when the drop height was varied from 0.5 m to 1 m. It is believed that the keel is the dominant component during the flat water trials and drop tests, and this is coupled with the fabric hull. No statistical difference was found in the wave trials results but this was explained through the drop test results. The predicted WBV from the wave trials does emphasises the need for a new WBV reduction strategy and incorporating an element of hydroelasticity along with other reduction methods could make a significant impact on the WBV. The airborne noise of the D-class was measured using ISO 14509. The airborne noise was above the limits set out by the European directive 2003/44/EC. A method was developed to measure the water borne noise of small High Speed Craft (HSC) in shallow waters. The water borne noise propagation was modelled using an Image source Transmission Loss (ImTL) model. The perception of the air and water borne noise by a harbour seal was predicted and it showed that the D-class is unlikely to cause damage to the auditory system at one metre but will definitely be audible to the seal at 20 m. The horizontal and vertical transmission loss through a shallow water channel was investigated.
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Selino, Anthony Frank. "Coherent Turbulence: Synthesizing tree motion in the wind using CFD and noise." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/3015.

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Animating trees in wind has long been a problem in computer graphics. Progress on this problem is important for both visual effects and biomechanics and may inform future work on two-way coupling between turbulent flows and deformable objects. Synthetic turbulence added to a coarse fluid simulation has been used to produce convincing animations of turbulent flows, but only considers one-way coupling between fluid and solid. We produce accurate animations of tree motion by creating a two-way coupling between synthetic turbulence and semipermeable proxy geometry. The resulting animations exhibit global wind sheltering effects and branch tips have motion paths which match paths collected from branch tips using motion capture.
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鄧志剛 and Chi-kong Clief Tang. "The interactions of two perturbed vortex rings." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31241025.

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Books on the topic "Motion noise"

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Dave, McKean, ed. Signal to Noise. London: Gollancz, 1992.

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Dave, McKean, ed. Signal to noise. 2nd ed. Milwaukie, Or: Dark Horse, 2007.

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L, Glegg Stewart A., and United States. National Aeronautics and Space Administration., eds. Velocity measurements in a turbulent trailing vortex and their application to BWI noise prediction. Blacksburg, VA: Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, 1991.

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Blackface, white noise: Jewish immigrants in the Hollywood melting pot. Berkeley: University of California Press, 1996.

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Alvin, Bayliss, and Institute for Computer Applications in Science and Engineering., eds. Response of multi-panel assembly to noise from a jet in forward motion. Hampton, VA: Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 1995.

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Alvin, Bayliss, and Institute for Computer Applications in Science and Engineering., eds. Response of multi-panel assembly to noise from a jet in forward motion. Hampton, VA: Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 1995.

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Lindstrom, Timothy Edward. Predictions and observations of seafloor infrasonic noise generated by sea surface orbital motion. Springfield, Va: Available from the National Technical Information Service, 1991.

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Robin, Orans, Duckett Sophie, White Susan, and Ames Research Center, eds. 1993 Technical Paper Contest for Women: Gear up 2000 : women in motion. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1994.

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Robin, Orans, Duckett Sophie, White Susan, and Ames Research Center, eds. 1993 Technical Paper Contest for Women: Gear up 2000, Women in Motion. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1994.

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Stewart, W. Kenneth. A preliminary study of shallow-water sonar issues: Signal motion loss and reverberation noise. [Woods Hole, Mass: Woods Hole Oceanographic Institution, Massachusetts Institute of Technology, 1993.

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Book chapters on the topic "Motion noise"

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Dusad, Ritika. "Correlations in Magnetic Monopole Motion." In Magnetic Monopole Noise, 53–56. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58193-0_6.

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Kokaram, Anil C. "Noise Reduction for Image Sequences." In Motion Picture Restoration, 241–60. London: Springer London, 1998. http://dx.doi.org/10.1007/978-1-4471-3485-5_10.

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Mandelbrot, Benoit B. "Fractal dimension, dispersion, and singularities of fluid motion." In Multifractals and 1/ƒ Noise, 416–18. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-2150-0_19.

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Schuss, Zeev. "The Physical Brownian Motion: Diffusion And Noise." In Applied Mathematical Sciences, 1–24. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-1605-1_1.

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Arnaudon, Alexis, Alex L. De Castro, and Darryl D. Holm. "Noise and Dissipation in Rigid Body Motion." In Stochastic Geometric Mechanics, 1–12. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63453-1_1.

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Qian, Hong. "Fractional Brownian Motion and Fractional Gaussian Noise." In Processes with Long-Range Correlations, 22–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-44832-2_2.

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Zhang, Zhongqiang, and George Em Karniadakis. "Brownian motion and stochastic calculus." In Numerical Methods for Stochastic Partial Differential Equations with White Noise, 11–51. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57511-7_2.

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Campbell, James A., and Sophie L. Nedelec. "Measuring Directional Underwater Sound with Particle Motion Eccentricity." In The Effects of Noise on Aquatic Life, 1–9. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10417-6_23-1.

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Han, D. K., J. H. Hong, J. Y. Shin, and T. S. Lee. "Accelerometer based motion noise analysis of ECG signal." In IFMBE Proceedings, 198–201. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03904-1_56.

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Jones, Ian T., S. Bruce Martin, and Jennifer L. Miksis-Olds. "Incorporating Particle Motion in Fish Communication and Listening Space Models." In The Effects of Noise on Aquatic Life, 1–14. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10417-6_73-1.

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Conference papers on the topic "Motion noise"

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DIXON, PJ, TJ GORDON, and JL HORNER. "VIBRATIONAL POWER TECHNIQUES APPLIED TO TRANSIENT WAVE MOTION IN BEAMS." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19729.

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Bucolo, Maide, Adriano Basile, Luigi Fortuna, and Mattia Frasca. "Motion analysis of flagellar bacteria." In Second International Symposium on Fluctuations and Noise, edited by Derek Abbott, Sergey M. Bezrukov, Andras Der, and Angel Sanchez. SPIE, 2004. http://dx.doi.org/10.1117/12.548626.

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Hay, Jeff. "Motion Amplification: A Full-Field Camera Based Vibration Technique." In Noise and Vibration Conference & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2021. http://dx.doi.org/10.4271/2021-01-1094.

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Waddell, J. Patrick, and Neil Brydon. "Noise Reduction Preprocessing for MPEG-2 Encoding." In SMPTE Advanced Motion Imaging Conference. IEEE, 2002. http://dx.doi.org/10.5594/m00225.

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Schneider, Kurt G. "Minimization of Error for Enforced Motion in FEM." In SAE 2001 Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-1409.

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BAE, J.-G., W.-H. JOO, and KY CHUNG. "AN EXPERIMENTAL STUDY ON THE ACTIVE CONTROL OF THE MOTION OF A MODEL SHIP CABIN." In Inter-Noise 1996. Institute of Acoustics, 2024. http://dx.doi.org/10.25144/19521.

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Guidati, Sandro. "Arrays in Motion - Localization Techniques for Compensation of Relative Motion between Microphone Arrays and Sources." In SAE 2013 Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2013. http://dx.doi.org/10.4271/2013-01-1966.

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Dubkov, Alexander A., and Vitaly N. Ganin. "Spectral Characteristics of Overdamped Brownian Motion in Randomly Switching Bistable Potential." In NOISE AND FLUCTUATIONS: 19th International Conference on Noise and Fluctuations; ICNF 2007. AIP, 2007. http://dx.doi.org/10.1063/1.2759732.

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Duchowski, Andrew, Sophie Jörg, Aubrey Lawson, Takumi Bolte, Lech Świrski, and Krzysztof Krejtz. "Eye movement synthesis with 1/ f pink noise." In MIG '15: Motion in Games. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2822013.2822014.

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Hänggi, Peter, Massimo Macucci, and Giovanni Basso. "The Ring of Brownian Motion: the good, the bad and the simply silly." In NOISE AND FLUCTUATIONS: 20th International Conference on Noice and Fluctuations (ICNF-2009). AIP, 2009. http://dx.doi.org/10.1063/1.3140484.

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Reports on the topic "Motion noise"

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Russell, John. Deliberate Motion Analytics Fused Radar and Video Test Results Deployed Beyond the Perimeter Fence in a High Noise Environment. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1855028.

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John H. Weathersby, Ph D. ,. P. E. Ground Motion and Noise Levels at Critical Locations on the Idaho National Laboratory Site Due to an Accidental Detonation at the Proposed MFC Explosive-Storage Facility. Test accounts, July 2009. http://dx.doi.org/10.2172/971369.

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Taira, Taka'aki, and Arthur Rodgers. Evaluating and Improving the USGS 3D Seismic Velocity Model in the San Francisco East Bay by Integrating Earthquake Ground-Motion Simulations and Noise-Derived Empirical Green's Functions. Office of Scientific and Technical Information (OSTI), May 2019. http://dx.doi.org/10.2172/1544513.

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4

Meyer, Erik. Cabrillo National Monument: Acoustic monitoring report, 2021. National Park Service, 2024. http://dx.doi.org/10.36967/2303446.

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Abstract:
This study arose from the Cabrillo National Monument (CABR) Resource Stewardship Strategy (RSS), which identified the need for baseline acoustic surveys in the park. One of the RSS stewardship goals was to minimize anthropogenic sounds outside and inside park boundaries to enhance the visitor experience. A Technical Assistance Request (TAR) for natural sounds inventory was submitted to the Natural Sounds and Night Skies Division. Therefore, in May 2021, the NSNSD gathered acoustic data at two sites in CABR to provide park managers with information about the acoustic environment, sources of noise, and the existing ambient sound levels within the park. On average, noise was present from 95 to 99 percent of the time across the two sites. The most common sources of noise were aircraft, motor sounds, and a foghorn. The maximum percent time audible for any detailed noise source was the foghorn at site CABR001, audible for 95% of a 24-hr period over 10 days of listening. Motor sounds were most audible at site CABR002, audible for 68% of the time. Overall, existing ambient sound levels (LA50) at sites at CABR were 39.5 and 43.1 dB during the day and 34.7 and 42.5 dB at night during the sampling period (CABR001 and CABR002, respectively). Natural ambient sound levels (LAnat) were 30.2 and 38.0 dB during the day and 26.6 and 38.4 dB at night for CABR001 and CABR002 respectively, although these measurements were likely influenced by the high prevalence of noise. As a supplement, a geospatial sound model predicts existing and natural ambient sound levels at CABR are 46.0 (dBA) and 31.4 (dBA), respectively.
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Singh, Niranjan. A Method of Sound Wave Diffusion in Motor Vehicle Exhaust Systems. Unitec ePress, April 2017. http://dx.doi.org/10.34074/ocds.072.

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It is common practice among young vehicle owners to modify the exhaust system of their vehicle to reduce exhaust backpressure with the perception that the output power increases. In the process of backpressure reduction, the output noise (Whakapau) of the vehicle also increases correspondingly. The conflict of interest that arises from modified vehicle exhaust systems and the general public is well publicised. This prototype was designed to meet the demands of exhaust back pressure reduction while at the same time mitigate the sound output of the vehicle. The design involves lining a cylindrical pipe with common glass marbles which is normally used for playing. The marbles are made of a sustainable material as it does not erode when exposed to exhaust gases and it is easily recycled. The prototype muffler is much smaller in size when compared to conventional mufflers. All tests were done in a simulated controlled environment and data collated using approved New Zealand Transport Agency testing regime. It has to be noted that the test focus was noise mitigation and not comprehensive engine performance testing. The results of the test prove a reduction of sound levels, however more testing needs to be undertaken with varying annulus depth, marble sizes and arrangements and engine loads.
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