Now showing items 1-10 of 584
Energy method to calculate the density of liquids using ultrasonic reflection techniques
In this work it is introduced a new approach to calculate the density of liquids in terms of the energies of the acoustic signals. This method is compared to other methods in the time domain (peak-to-peak amplitudes) and ...
A model for three-dimensional simulation of acoustic emissions from rotating machine vibration
(Acoustical Soc Amer Amer Inst PhysicsMelvilleEUA, 2010)
Energetic analysis of an actively controlled one-dimensional acoustic waveguide
(Elsevier Sci LtdOxfordInglaterra, 2003)
An indirect hybrid sound transmission loss controller
(Elsevier Sci LtdOxfordInglaterra, 2012)
Acoustic Imaging of In-Duct Aeroengine Noise Sources Using Rotating Beamforming and Phased Arrays
(Ieee-inst Electrical Electronics Engineers Inc, 2017-09-01)
An in-duct rotating beamforming technique, using a wall-mounted array of microphones placed within a long duct, was developed for locating broadband noise sources from an aeroengine fan. The technique was experimentally ...
Geoprocessing applied to the assessment of environmental noise: a case study in the city of Sorocaba, São Paulo, Brazil
Noise mapping has been used as an instrument for assessment of environmental noise, helping to support decision making on urban planning. In Brazil, urban noise is not yet recognized as a major environmental problem by the ...
Urban green spaces and the influence on vehicular traffic noise control
(ANTAC - Associação Nacional de Tecnologia do Ambiente Construído, 2018)