Searched for: subject:"acoustics"
(1 - 20 of 945)

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Kotti, S.E. (author), Heusdens, R. (author), Hendriks, R.C. (author)
The use of wireless acoustic sensor networks (WASNs) has received increased attention over the last decade. The advantages of WASNs over stand-alone multi-microphone devices are that the microphone array is not anymore limited by the dimensions of a single device, and that microphones can be placed at arbitrary locations. One of the...
conference paper 2021
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van Neer, P. (author), Volker, A. (author), Berkhoff, A. (author), Schrama, T. (author), Akkerman, H. (author), van Breemen, A. (author), Peeters, L. (author), van der Steen, J.L. (author), Gelinck, G.H. (author)
Ultrasound based mid-air haptic feedback devices can produce tactile sensations at any time and position without restricting human motion. This is useful for augmented and virtual reality, feedback buttons and virtual user interfaces. The haptic feedback mechanism is caused by acoustic radiation force and streaming. Typical solutions to induce...
conference paper 2020
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van Es, M.H. (author), Quesson, B.A.J. (author), Mohtashami, A. (author), Piras, D. (author), Hatakeyama, K. (author), Fillinger, L. (author), van Neer, P.L.M.J. (author)
In order to extract ever more performance from semiconductor devices on the same device area, the semiconductor industry is moving towards device structures with increasingly complex material combinations and 3D geometries. To ensure cost effective fabrication of next generation devices, metrology solutions are needed that tackle the specific...
conference paper 2020
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Müller, R.A.J. (author), von Benda-Beckmann, A.M. (author), Halvorsen, M.B. (author), Ainslie, M.A. (author)
Regulations for underwater anthropogenic noise are typically formulated in terms of peak sound pressure, root-mean-square sound pressure, and (weighted or unweighted) sound exposure. Sound effect studies on humans and other terrestrial mammals suggest that in addition to these metrics, the impulsiveness of sound (often quantified by its kurtosis...
article 2020
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van Es, M.H. (author), Quesson, B.A.J. (author), Mohtashami, A. (author), Piras, D. (author), Hatakeyama, K. (author), Fillinger, L. (author), van Neer, P.L.M.J. (author)
In order to extract ever more performance from semiconductor devices on the same device area, the semiconductor industry is moving towards device structures with increasingly complex material combinations and 3D geometries. To ensure cost effective fabrication of next generation devices, metrology solutions are needed that tackle the specific...
conference paper 2020
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Tajdari, F. (author), Berkhoff, A.P. (author), de Boer, A. (author)
This paper focuses on extensive numerical and experimental investigations of a thin sandwich acoustic source. Due to an energy inefficient actuation design, a thin sandwich acoustic source that was proposed in an early study is redesigned and reconstructed in the current research. The thin acoustic source in the present paper is actuated by long...
article 2020
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Phogat, R. (author), González Díez, N. (author), Smeulers, J.P.M. (author), Casalino, D. (author), Avallone, F. (author)
Impeller rotation, vortex shedding, secondary flows or a combination of these phenomena can lead to the generation of acoustic waves in the compressor cascade causing dynamic pressure loading on the impeller. When the eigenfrequency and eigenmode shape of the acoustic mode match with the structural ones of the impeller, high fatigue stresses and...
conference paper 2020
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Prior, M.K. (author), Duncan, A.J. (author), Sertlek, H.Ö. (author), Ainslie, M.A. (author)
Comparisons are made of sound pressure and particle acceleration predicted by two methods in the vicinity of two arrays of marine-seismic airguns. Data describing the array properties and the environmental conditions are taken from test cases designed to facilitate intermodel comparison.The two propagation approaches, one based on method of...
article 2019
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Ainslie, M.A. (author), Laws, R.M. (author), Sertlek, H.O. (author)
Computer models can be used to predict the sound field near an airgun or airgun array. The accuracy of such predictions can be assessed either by a process of verification (comparison with alternative theoretical solution to the same computational problem) or by validation (comparison with measurement). A set of verification test problems is...
article 2019
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van Neer, P.M.L.J. (author), Quesson, B.A.J. (author), van Es, M.H. (author), van Riel, M.C.J.M. (author), Hatakeyama, K. (author), Mohtashami, A. (author), Piras, D. (author), Duivenvoorde, T. (author), van der Lans, M.J. (author), Sadeghian Marnani, H. (author)
The characterization of buried nanoscale structures nondestructively is an important challenge in a number of applications, such as defect detection and metrology in the semiconductor industry. A promising technique is Subsurface Scanning Probe Microscopy (SSPM), which combines ultrasound with Atomic Force Microscopy (AFM). Initially, SSPM was...
article 2019
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Saeed, A. (author), Volker, A.W.F. (author), Martina, Q. (author), Alalouni, A. (author)
Scale and corrosion affect the production certainty of oil and gas well. Scale build-up reduces flow and ultimately could shut down production when it block to tubing completely. Corrosion of the tubing wall occurs very often simultaneously with scale build-up and affects the integrity of the tubing wall. Vital information about the integrity is...
conference paper 2019
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Koek, W.D. (author), van Zwet, E.J. (author), Plissi, M. (author), Eschen, M. (author), Piras, D. (author), van Neer, P.L.M.J. (author), van der Lans, M.J. (author)
We have developed a photo thermal acoustic imaging (PTAI)setup and have applied it for the characterization of sub surface features composed of materials which are commonly used in the semiconductor industry. Photo thermal acoustic imaging (PTAI) is a measurement technique that combines the practical advantages of an optical technique (non...
other 2019
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von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Prior, M. (author), Ainslie, M.A. (author), Hansen, R.R. (author), Isojunno, S. (author), Lam, F.P.A. (author), Kvadsheim, P.H. (author), Miller, P.J.O. (author)
To understand the consequences of underwater noise exposure for cetaceans, there is a need for assessments of behavioural responses over increased spatial and temporal scales. Bottom-moored acoustic recorders and satellite tags provide such long-term and large spatial coverage of behaviour compared to short-duration acoustic-recording tags....
article 2019
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Dol, H.S. (author)
In this paper, the European Defence Agency (EDA)project SALSA is presented. In SALSA, which stands for Smart Adaptive Long- and Short-range Acoustic network, five European navies have united to create a common protocol stack for adaptive underwater acoustic communication and cognitive underwater networking. Within four years, the SALSA stack...
conference paper 2019
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Bosschaart, C. (author)
The Royal Netherlands Navy operates a low-frequency active sonar consisting of a combination of a towed sonar source and receiver array in order to detect and classify objects underwater. The operation involves transmitting high power underwater sound towards an object and detecting the echo reflected by the object. Operating a towed source at...
conference paper 2019
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Blom, K.C.H. (author), Dol, H.S. (author)
For enabling efficient operation of untethered underwater vehicles, error-free underwater communication of command-and-control and telemetry data is a necessity. In contrast, the communication requirements for the sensor data of these vehicles are often less stringent, i.e., a few bad pixels in a SONAR image might be tolerated. To maximize...
conference paper 2019
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Fransman, J.E. (author), Sijs, J. (author), Dol, H.S. (author), Theunissen, E. (author), de Schutter, B. (author)
In this paper, Mine Counter-Measures (MCM) operations with multiple cooperative Autonomous Underwater Vehicles (AUVs) are examined within the Distributed Constraint optimization Problem (DCOP) framework. The goal of an MCM-operation is to search for mines and mine-like objects within a predetermined area so that ships can pass the area through a...
conference paper 2019
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Verdel, A. (author), van Haeringen, D. (author), Vandeweijer, V. (author), Carpentier, S. (author), Meekes, S. (author)
We demonstrate in this geothermal exploration case study performed in The Netherlands that ambient noise seismic interferometry (ANSI) can be an effective and efficient method for obtaining surface wave dispersion curves, leading to shallow shear-wave velocity-depth profiles that can improve imaging of deep structures. As the ANSI method...
conference paper 2019
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Zebregs, M. (author), Mayer, A.E.H.J. (author), van der Heijden, A.E.D.M. (author)
In this comparative study, a solid composite, AN/HTPB-based propellant was prepared by conventional processing in a mechanical mixer and by applying an advanced processing technique relying on resonant acoustic mixing (RAM). After curing of the propellants, cross-sections were prepared and characterized by scanning electron microscopy. Also the...
article 2019
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Pacini, F. (author), Paoli, G. (author), Cayón, I. (author), Rivera, T. (author), Sarmiento, B. (author), Kebkal, K. (author), Kebkal, O. (author), Kebkal, V. (author), Geelhoed, J. (author), Schipperijn, B. (author), Dol, H.S. (author), Skogseth, T. (author)
The management of a heterogeneous mix of underwater vehicles needs a robust and reliable communication network, able to connect the remote command and control station (typically ashore or on board of a support ship) with nodes and vehicles in the deep sea. on the basis of this scenario, the infrastructure shall satisfy requirements such as:...
conference paper 2018
Searched for: subject:"acoustics"
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