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On Front-end Gain Invariant Modeling for Wake Word Spotting [article]

Yixin Gao, Noah D. Stein, Chieh-Chi Kao, Yunliang Cai, Ming Sun, Tao Zhang, Shiv Vitaladevuni
2020 arXiv   pre-print
Wake word (WW) spotting is challenging in far-field due to the complexities and variations in acoustic conditions and the environmental interference in signal transmission.  ...  A suite of carefully designed and optimized audio front-end (AFE) algorithms help mitigate these challenges and provide better quality audio signals to the downstream modules such as WW spotter.  ...  Conclusions In this paper we study the influence of audio front-end (AFE) variation on far-field wake word (WW) spotting and propose a modeling approach for AFE gain invariant WW spotting.  ... 
arXiv:2010.06676v1 fatcat:ll7ts22q3bdpjfjqrfectvhi24

On Front-End Gain Invariant Modeling for Wake Word Spotting

Yixin Gao, Noah D. Stein, Chieh-Chi Kao, Yunliang Cai, Ming Sun, Tao Zhang, Shiv Naga Prasad Vitaladevuni
2020 Interspeech 2020  
Wake word (WW) spotting is challenging in far-field due to the complexities and variations in acoustic conditions and the environmental interference in signal transmission.  ...  A suite of carefully designed and optimized audio front-end (AFE) algorithms help mitigate these challenges and provide better quality audio signals to the downstream modules such as WW spotter.  ...  Conclusions In this paper we study the influence of audio front-end (AFE) variation on far-field wake word (WW) spotting and propose a modeling approach for AFE gain invariant WW spotting.  ... 
doi:10.21437/interspeech.2020-1992 dblp:conf/interspeech/GaoSKCSZV20 fatcat:m6hb6shgkrf67eg5c6rreajanq

Progress on plasma accelerators: from the energy frontier to tabletops

T Katsouleas
2004 Plasma Physics and Controlled Fusion  
Major breakthroughs on both fronts have occurred in the past year. In parallel with the progress in laser-driven wakefields, particle-beam driven wakefield accelerators are making large strides.  ...  These early experiments have been followed in the current decade by experiments that are advancing on several fronts-increasing the accelerated charge (to the several nanocoulomb level), producing higher  ...  In summary, this has been a breakthrough year for plasma-based acceleration with major progress on many fronts.  ... 
doi:10.1088/0741-3335/46/12b/046 fatcat:f4yqjuujujbvpf5gcoktjeggtm

Numerical modelling of a 10-cm-long multi-GeV laser wakefield accelerator driven by a self-guided petawatt pulse

S Y Kalmykov, S A Yi, A Beck, A F Lifschitz, X Davoine, E Lefebvre, A Pukhov, V Khudik, G Shvets, S A Reed, P Dong, X Wang (+10 others)
2010 New Journal of Physics  
(PIC) code, WAKE.  ...  The process of electron self-injection is explored by means of both test-particle modelling (WAKE) and 3D PIC simulations using the recently developed CALDER-Circ code in quasi-cylindrical geometry.  ...  , which enables precise WAKE modelling.  ... 
doi:10.1088/1367-2630/12/4/045019 fatcat:at22uy7uhzcehf6zyelbshj37q

Deep Spoken Keyword Spotting: An Overview

Ivan Lopez-Espejo, Zheng-Hua Tan, John Hansen, Jesper Jensen
2021 IEEE Access  
ladevuni, “On front-end gain invariant modeling for wake word spotting,” [97] X. Ji, M. Yu, J. Chen, J. Zheng, D. Su, and D.  ...  Vitaladevuni, “To- extraction using keyword spotting,” in Proceedings of INTERSPEECH wards data-efficient modeling for wake word spotting,” in Proceedings  ... 
doi:10.1109/access.2021.3139508 fatcat:i4pfpfxcpretlkbefp7owtxcti

Interference Robust Detector-First Near-Zero Power Wake-Up Receiver

Jesse Moody, Pouyan Bassirian, Abhishek Roy, Ningxi Liu, N. Scott Barker, Benton H. Calhoun, Steven M. Bowers
2019 IEEE Journal of Solid-State Circuits  
This paper presents the development of a wake-up receiver (WuRX) at nanowatt power levels for event-driven applications.  ...  Both the detectors have limited sensitivity due to the lack of RF gain on the front end and are primarily limited by the noise produced from the detector.  ...  DETECTOR-FIRST FRONT-END DESIGN A.  ... 
doi:10.1109/jssc.2019.2912710 fatcat:bcd2ojugdvfonf576vw3uixsma

Optical and electrostatic potential investigations of electrical breakdown phenomena in a low-pressure gas discharge lamp

M F Gendre, M Haverlag, G M W Kroesen
2010 Journal of Physics D: Applied Physics  
Differences in the properties of the waves were observed depending on the voltage polarity, and it was estimated that a photoelectric effect at the wall is the most likely source of electron for the ionisation  ...  This return stroke draws a homogeneous plasma column which eventually bridges both electrodes at the end of the wave propagation.  ...  for the sustained propagation of the wave front, and for another part of the influence of the developing wave wake on the propagation of the wave front.  ... 
doi:10.1088/0022-3727/43/23/234004 fatcat:p3rizte4ozf6bauqzwj7bx6ute

Design and Simulation Challenges of a Linac-Based Free Electron Laser in the Presence of Collective Effects [chapter]

S. Di
2012 Free Electron Lasers  
Because of the principle of causality, the wake is zero if the test electron is in front of the wake source.  ...  Machine configurations and start-to-end simulations In spite of the specific features that each new FEL source is showing in its conceptual design, flexibility is still a key word for all existing projects  ... 
doi:10.5772/36647 fatcat:o322okl77nhg5aroraziuulfc4

The resonant brain: How attentive conscious seeing regulates action sequences that interact with attentive cognitive learning, recognition, and prediction

Stephen Grossberg
2019 Attention, Perception & Psychophysics  
They create a foundation for learning to control motor-equivalent arm movement sequences, and for storing these sequences in cognitive working memories that can trigger the learning of cognitive plans  ...  Surface-shroud resonances support conscious seeing and action, whereas feature-category resonances support learning, recognition, and prediction of invariant object categories.  ...  blind spot.  ... 
doi:10.3758/s13414-019-01789-2 pmid:31218601 pmcid:PMC6848053 fatcat:jx27vspaq5fz7o7u6mtasfakju

The Truth on Gravity and Terrestrial Global Warming. Part 1: The Quantum Gravity Field

Horia DUMITRESCU, Vladimir CARDOS, Radu BOGATEANU
2022 INCAS Bulletin  
in most cases from the unfinished Einstein's theory of gravity using untrue models for the torsion tensor, have failed to explain the gravitational and precessional aspects, causally connected with the  ...  Although during the last century both experimental and computational technology progress has accumulated solid factual information on the deeper knowledge of our actual world, the previous approaches derived  ...  The polarization property of a percussion gains different meanings depending on the utilization field, statistical mathematics and/or physics.  ... 
doi:10.13111/2066-8201.2022.14.1.2 fatcat:yveblaorjzhnxn57rtnyopiude

THz cavities and injectors for compact electron acceleration using laser-driven THz sources

Moein Fakhari, Arya Fallahi, Franz X. Kärtner
2017 Physical Review Accelerators and Beams  
Based on the developed concept for optimal coupling of the THz pulse, a THz electron injector and two accelerating stages are designed.  ...  We present a design methodology for developing ultrasmall electron injectors and accelerators based on cascaded cavities excited by short multicycle THz pulses obtained from laser-driven THz generation  ...  The photo emission process for generating the electrons is simulated using the ASTRA model. 10,000 macroparticles with a total charge of 100 fC are injected from the cathode located at the end plate of  ... 
doi:10.1103/physrevaccelbeams.20.041302 fatcat:zzlpytfi7ven5gxlz7rhedzcge

A Mathematical Approach to the Sleep-Waking Cycle [article]

Michael Rvachov
2020 arXiv   pre-print
Instead, presumably, if turning each of them off periodically for a resetting is unavoidable, then doing this one at a time would be the evolutionary choice, if that were possible.  ...  The theory provides simpler and less speculative explanations of a number of the experimental results than interpretations by the existing theories (the two-stage model of memory consolidation etc.).  ...  If waving is slow, we see the light as one spot, because it is in one spot.  ... 
arXiv:1210.8089v15 fatcat:qnhd3dzswrffxf4i4bnj6t3uaa

Reaction?diffusion models of development with state-dependent chemical diffusion coefficients

C ROUSSEL
2004 Progress in Biophysics and Molecular Biology  
In other words, the number of molecules passing through the surface in time dt is just J x dA dt.  ...  What analytic forms for the diffusion coefficients are we likely to encounter in practice? What are the consequences of including state-dependent diffusion coefficients in a model?  ...  e for the use of his computer workstation. This work was supported by the Natural Sciences and Engineering Research Council of Canada.  ... 
doi:10.1016/j.pbiomolbio.2004.03.001 pmid:15261527 fatcat:fz45sgaokjcgbaym7t6rp6xhxm

Direct numerical simulations of riblets to constrain the growth of turbulent spots

JAMES S. STRAND, DAVID B. GOLDSTEIN
2011 Journal of Fluid Mechanics  
Ensemble averaging was used to obtain more accurate results for the spot spreading angle, both for the flat-wall case and the riblet case.  ...  The flat plate, riblets and initial spot perturbation were simulated via an immersed boundary method, and a 'suction wall' allowed the available channel code to model a boundary layer.  ...  in the wake of the spot.  ... 
doi:10.1017/s0022112010005033 fatcat:w4sbtwbhrfanndsqnnedqyfnee

The Constructionist Theory of Speech as Visual Semiotics

Antonio SANDU
2014 Postmodern Openings  
way of gaining interpretative consensus through which the interpretative community assigns sensus to a semantic structure conventionally accepted as being real.  ...  At the end of the campaign when the University couldn't attract any students to this Department, I was asked to conduct an audit of communication in order to identify the real effects of the campaign and  ...  The model of analysis proposed for identifying the semantic drift and the co-variation of the designated based on the interpretative context.  ... 
doi:10.18662/po/2014.0503.04 fatcat:pslolmamkng5ja62gq4dypvfva
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