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Acoustic image-based damage identification of oxide aluminum grinding wheel during the dressing operation
(2019-01-01)
Grinding is a finish process of parts that require high precision and tight dimensional tolerance, which owe high value-added. As the grinding process takes place, the cutting surface of the grinding wheel undergoes wear ...
Feature extraction based on the high-pass filtering of audio signals for Acoustic Event Classification
(Academic Press, 2015)
In this paper, we propose a new front-end for Acoustic Event Classification tasks (AEC). First, we study the spectral characteristics of different acoustic events in comparison with the structure of speech spectra. Second, ...
Analysis of the stability and dispersion for a Riemannian acoustic wave equation
(ELSEVIER SCIENCE INC, 2019-01-15)
The construction of images of the Earth's interior using methods as reverse time migration (RTM) or full wave inversion (FWI) strongly depends on the numerical solution of the wave equation. A mathematical expression of ...
In-Dressing Acoustic Map by Low-Cost Piezoelectric Transducer
(Ieee-inst Electrical Electronics Engineers Inc, 2020-08-01)
The main difficulty in the grinding process is to identify the correct moment to dress the grinding wheel. Therefore, the cutting tool (grinding wheel) must be monitored. In this context, an innovative technique was developed ...
Simulação acústica de salas de aula em escolas de educação básica: uma proposta tipológica para prática musical
(Universidade Federal de Santa MariaBREngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia Civil, 2012-09-24)
The study of room acoustics is linked to the importance of sound inside a room, so the architectural characteristics of the internal space determine the acoustic
behavior. To get better acoustics of a room there are ...
Caraceterização acústica de salas para prática e ensino musical
(Universidade Federal de Santa MariaBREngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia Civil, 2011-08-25)
The musician needs to properly perceive the sound in rooms where it operates, either in an environment designed to be performed or to studying and practice music. For this, it is necessary that these sites are acoustically ...
DIFFRACTION OF AN ACOUSTIC WAVE BY A PLATE IN A UNIFORM FLOW: A NUMERICAL APPROACH
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2005)
We study the diffraction in time harmonic regime of an acoustic wave by a rigid plate in the presence
of a uniform flow in a duct. Contrary to prior analytical studies, using Wiener–Hopf techniques and
thus restricted ...
Effects of operating conditions on the acoustic emissions (ae) from planetary gearboxesAPPLIED ACOUSTICSAPPL ACOUST
(APPLIED SCIENCE PUBLISHERS, 2014)