Results 51 to 60 of about 99,340 (315)

Simplified techniques for predicting the transmission loss of a circular dissipative silencer [PDF]

, 2001
A closed-form analytical solution for the transmission loss of a dissipative silencer with a circular cross-section is described. The silencer contains a bulk reacting acoustic absorbent which is separated from a mean gas flow by a perforated screen ...
Kirby, R
core   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

Sound transmission through curved aircraft panels with stringers and ring frames attachments

, 2007
A numerical approach based on a receptance method has been developed to evaluate the airborne sound insulation of aircraft panels with stringer and ring frame attachments.
Feng, Leping,, Liu, Bilong,, Nilsson, Anders,   +2 more
core   +1 more source

Range-dependent flexibility in the acoustic field of view of echolocating porpoises (Phocoena phocoena) [PDF]

, 2015
Funding: Det Frie Forskningsrad (MJ)Toothed whales use sonar to detect, locate, and track prey. They adjust emitted sound intensity, auditory sensitivity and click rate to target range, and terminate prey pursuits with high-repetition-rate, low-intensity
Christensen, C.B., Johnson, Mark, John M Ratcliffe, Johnson, M., Koblitz, Jens C., Koblitz, J., Madsen, Peter Teglberg, Wisniewska, D., Beedholm, Kristian, Jens C Koblitz, Ratcliffe, J., Wahlberg, M., Koblitz, Jens C, Madsen, P.T., Ratcliffe, John M., Madsen, P., Madsen, Peter T., Koblitz, J. C., Wisniewska, Danuta Maria, Wisniewska, Danuta M., Wahlberg, Magnus, Danuta M Wisniewska, Madsen, Peter M., Christensen, C. B., Christensen, Christian Bech, Beedholm, K., Ratcliffe, J.M., Magnus Wahlberg, Wisniewska, D.M., Kristian Beedholm, Wahlberg, Magnus; id_orcid, Christensen, Christian B., Christian B Christensen, Koblitz, J.C., Wisniewska, D. M.; id_orcid, Ratcliffe, John Morgan, Mark Johnson, Christensen, C., Peter T Madsen   +38 more
core   +1 more source

Flexible Ag2Se‐Based Thermoelectrics: Fundamentals, Processing, and Device Applications

Advanced Materials, EarlyView.
Ag2Se‐based thermoelectrics are reviewed from fundamental transport mechanisms to flexible device integration. Crystal structure, defect chemistry, and band features are correlated with performance optimization strategies and scalable fabrication routes.
Jie Qin, Yuchen Yang, Huangshui Ma, Yong Du, Min Hong, Qinfei Ke   +5 more
wiley   +1 more source

Vibrational Analysis of Building Structures with Irregularities

Applied Sciences
This paper presents a mathematical model for predicting vibrations in lightweight, timber-based floor/ceiling structures, enhanced to account for irregularities in joist shape and stiffness, as well as floor stiffness.
Colin Fox, Hyuck Chung
doaj   +1 more source

A research of the transmission of sound through teeth

Practica Oto-Rhino-Laryngologica, 1928
The writer had tried a comparative test of bone conduction of sound through the teeth, the mastoid process, and the frontal with 100 persons of normal hearing, and proved it to be more effective through the teeth than the other two parts. He has now made a further test with a special apparatus in order to get more conclusive results.
openaire   +5 more sources

The influence of baffle fairings on the acoustic performance of rectangular splitter silencers

, 2005
A numerical model based on the finite element method is developed for a finite length, HVAC splitter silencer. The model includes an arbitrary number of bulk-reacting splitters separated from the airway by a thin perforated metal sheet and accommodates ...
Kirby, R, Ray Kirby
core   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

Analysis of Active Sounds for Fire Localization

SICE Journal of Control, Measurement, and System Integration, 2017
Localization of fire in smoke environments enables fire-fighters to perform fire-fighting operations safely in a short time, and it is also required to develop autonomous fire-fighting robots.
Yasushi Iwatani, Shoji Kasai, Hiroyuki Torikai   +2 more
doaj   +1 more source