Results 71 to 80 of about 478,471 (211)

Structural-acoustic coupling and psychophysical effects in the active control of noise in vehicles

open access: yes, 2011
Active noise control systems offer a potential method of reducing the weight of passive acoustic treatment and, therefore, increasing vehicles' fuel efficiency. These can be particularly cost-efficient if integrated with the entertainment system.
Abbott, Mark   +2 more
core  

Visual Quality Enhancement in Optoacoustic Tomography using Active Contour Segmentation Priors

open access: yes, 2016
Segmentation of biomedical images is essential for studying and characterizing anatomical structures, detection and evaluation of pathological tissues.
Deán-Ben, Xosé Luís   +2 more
core   +1 more source

Hover and forward flight acoustics and performance of a small-scale helicopter rotor system [PDF]

open access: yes
A 2.1-m diam., 1/6-scale model helicopter main rotor was tested in hover in the test section of the NASA Ames 40- by 80- Foot Wind Tunnel. Subsequently, it was tested in forward flight in the Ames 7- by 10-Foot Wind Tunnel.
Kitaplioglu, C., Shinoda, P.
core   +1 more source

Development of universal software radio peripheral amplifier for underwater acoustic platform using software defined radio [PDF]

open access: yes, 2010
First and foremost, the development of a modem using the USRP has applications in oceanographic monitoring and communication. Improved acoustic connecting would allow more efficient transfer of information between Underwater Acoustic (UWA) equipment such
Kalash, Haydar Sabeeh
core  

Sound Insulation Performance of Sustainable LC3 Mortars with Barite and Waste Rubber Aggregates

open access: yesJournal of Sustainable Construction Materials and Technologies
This study investigates the potential of limestone calcined clay cement (LC3) as a sustainable binder for developing as i n g l e - l a y e rc o m p o s i t em a t e r i a li n c o r p o r a t i n gb a r i t ea n dr u b b e ra g g r e g a t e s ,h y p o ...
Begüm Söyek Abay, Leyla Tanaçan
doaj   +1 more source

Noise Reduction in Double‐Panel Structures by Cavity and Panel Resonance Control [PDF]

open access: yes, 2011
This paper presents an investigation of the cavity and the panel resonance control in a double‐panel structure. The double‐panel structure, which consists of two panels with air in the gap, is widely adopted in many applications such as aerospace due to ...
Berkhoff, Arthur, Ho, Jen-Hsuan
core   +2 more sources

Analysis of acoustic performance in wall and floor systems in multifamily buildings

open access: yesRevista de Engenharia Civil IMED, 2019
The performance’s standard NBR 15575 started to demand from builders the minimum standards of quality and performance, in order to attend the user’s requirements and to seek greater market competitiveness.
Felipe Alves Amâncio   +4 more
doaj   +1 more source

A compact inflow control device for simulating flight fan noise [PDF]

open access: yes
Inflow control device (ICD's) of various shapes and sizes have been used to simulate inflight fan tone noise during ground static tests. A small, simple inexpensive ICD design was optimized from previous design and fabrication techniques.
Heidelberg, L. J.   +2 more
core   +1 more source

An acoustic metamaterial lens for acoustic point-to-point communication in air

open access: yes, 2017
Acoustic metamaterials have become a novel and effective way to control sound waves and design acoustic devices. In this study, we design a 3D acoustic metamaterial lens (AML) to achieve point-to-point acoustic communication in air: any acoustic source ...
Guo, Shuwei   +4 more
core  

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