Acoustically transparent duct

A Configurable Microphone Array with Acoustically Transparent Omnidirectional Elements

An acoustically transparent, configurable microphone array with omnidirectional elements, designed for room acoustics analysis and synthesis, and archaeological acoustics applications, is presented. Omnidirectional microphone elements with 2 mm-diameter capsules and 1 mm-diameter wire mounts produce a nearly acoustically transparent array, and provide a simplified mathematical framework for pro...

Carbon nanotube reinforced acoustically transparent epoxy nanocomposites for underwater sonar windows

acoustically transparent epoxy, nanocomposites for underwater sonar windows J. Adv. Mater. 41 [3] (2009) 5-17. 1 Carbon nanotube reinforced acoustically transparent epoxy nanocomposites for underwater sonar windows Wei Chen, Shankar Rajaram, Shad Thomas, Steven R. Nutt 1. Materials Science and Chemical Engineering, University of Southern CaliforniaVHE406, 3651 Watt Way, Los Angeles, CA, USA, 90...

A Difference Theory for Noise Propagation in an Acoustically Lined Duct with Mean Flow

The Acoustic and Instability Waves of Jets Confined inside an Acoustically Lined Rectangular Duct

An analysis of linear wave modes associated with supersonic jets con ned inside an acoustically lined rectangular duct is presented. Mathematical formulations are given for the vortex-sheet model and continuous mean ow model of the jet ow pro les. Detailed dispersion relations of these waves in a two-dimensional con ned jet as well as an uncon ned free jet are computed. E ects of the con ning d...

Acoustically propelled nanoshells.

Herein we report a new design for acoustic nanoswimmers, making use of a nanoshell geometry that was synthesized using a sphere template process. Such shell-shaped nanomotors display highly efficient acoustic propulsion on the nanoscale by converting energy from the ambient acoustic field into motion. The propulsion mechanism of the nanoshell motors relies on acoustic streaming stress over the ...