Results 31 to 40 of about 122,608 (207)

A room-temperature ultrasonic hydrogen sensor based on a sensitive layer of reduced graphene oxide

open access: yesScientific Reports, 2021
It is challenging to increase the sensitivity of a hydrogen sensor operating at room temperature due to weak sorption and tiny mass of hydrogen. In this work, an ultrasonic sensor is presented for detecting hydrogen, which is composed of a 128° YX-LiNbO3
Xue-Yu Zhang   +5 more
doaj   +1 more source

A Robust Denoised Algorithm Based on Hessian–Sparse Deconvolution for Passive Underwater Acoustic Detection

open access: yesJournal of Marine Science and Engineering, 2023
Digital beamforming techniques find wide applications in the field of underwater acoustic array signal processing. However, their azimuthal resolution has long been constrained by the Rayleigh limit, consequently limiting their detection performance.
Fan Yin   +6 more
doaj   +1 more source

Computing Room Acoustics Using 3D FDTD: A Cuda Approach. [PDF]

open access: yes, 2011
In seeking to model realistic room acoustics, direct numerical simulation can be employed. This paper presents 3D Finite Difference Time Domain schemes that incorporate losses at boundaries and due to the viscosity of air.
Stefan Bilbao   +3 more
core   +1 more source

Acoustics of the Vowel - Preliminaries [PDF]

open access: yes, 2016
It seems as if the fundamentals of how we produce vowels and how they are acoustically represented have been clarified: we phonate and articulate. Using our vocal chords, we produce a vocal sound or noise which is then shaped into a specific vowel sound ...
Maurer, Dieter
core   +1 more source

Chronicle

open access: yesArchives of Acoustics, 2014
1. General Assembly of Delegates of Polish Acoustical Society 2. Dissertation: Determination of the spatial distribution of spectral components of ship's noise [in Polish], 23 December 1998 by Paulina Bittner 3.
Editorial Board Archives of Acoustics
doaj   +4 more sources

COMPUTATIONAL ACOUSTICS IN MULTI-FIELD PROBLEMS [PDF]

open access: yes, 2011
We present physical/mathematical models base on partial differential equations (PDEs) and efficient numerical simulation schemes based on the Finite Element (FE) method for multi-field problems, where the acoustic field is the field of main interest ...
MANFRED KALTENBACHER   +1 more
core   +1 more source

JOINT CONFERENCE – ACOUSTICS 2018

open access: yesArchives of Acoustics, 2018
The paper contains the abstracts of papers presented during JOINT CONFERENCE – ACOUSTICS 2018: 65th Open Seminar on Acoustics 35th Symposium on Hydroacoustics Polish-German Structured Conference on Acoustics Ustka, Poland, September 11 – 14 ...
Chronicle JOINT CONFERENCE – ACOUSTICS 2018
doaj   +1 more source

45th Winter School on Wave and Quantum Acoustics and XLIVth Winter School on Environmental Acoustics and Vibroacoustics

open access: yesArchives of Acoustics, 2016
On behalf of Upper Silesian Division of the Polish Acoustical Society (main organizer) and Committee of Acoustics of the Polish Academy of Sciences (co-organizer) we are pleased to announce that it is nearing the end of preparations for the conduct ...
45th Winter School on WQA; XLIVth Winter School on EA&V
doaj   +1 more source

46th Winter School on Wave and Quantum Acoustics XLVth Jubilee Winter School on Environmental Acoustics and Vibroacoustics Szczyrk, Poland, February 27 –March 2, 2017

open access: yesArchives of Acoustics, 2017
46th Winter School on Wave and Quantum Acoustics constitutes a platform for sharing the results and achievements obtained in different branches of physical acoustics.
Winter Schools on Acoustic
doaj   +1 more source

Acoustic biosensors [PDF]

open access: yesEssays in Biochemistry, 2016
Resonant and acoustic wave devices have been researched for several decades for application in the gravimetric sensing of a variety of biological and chemical analytes. These devices operate by coupling the measurand (e.g. analyte adsorption) as a modulation in the physical properties of the acoustic wave (e.g.
Fogel, Ronen   +2 more
openaire   +3 more sources

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