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Dynamics of an acoustic black hole as an open quantum system
(American Physical Society, 2013-04-11)
We study the process of decoherence induced by the presence of an environment in acoustic black holes, using the open quantum system approach, thus extending previous work. We focus on the ion trap model but the formalism ...
Propagation of natural toad calls in a Mediterranean terrestrial environment
(2012)
Propagation patterns of animal acoustic signals provide insights into the evolution of signal design to convey signalers information to potential recipients. However, propagation properties of vertebrate calls have been ...
Acoustic Characteristics of the Voice for Brazilian Portuguese Speakers Across the Life Span
(2020-01-01)
Introduction: Vocal changes occur across the life span and can be reflected in acoustic measurements. Objective: To investigate the characteristics of voice production of the Brazilian Portuguese speakers across the life ...
Savage beach club: anteprojeto de uma boate
(Universidade Federal do Rio Grande do NorteBrasilUFRNArquitetura e Urbanismo, 2018-06-29)
In coastal cities, as Natal, it is characteristic that the sea becomes an element of daily attraction, concentrating leisure and entertainment equipment. Combined to that, Natal is returning to attract cultural events ...
Calling sites and acoustic partitioning in species of the Hyla nana and rubicundula groups (Anura, Hylidae)
(2006-07-01)
We analysed spatial and acoustic partitioning among four species of Hyla belonging to two species-groups: nana (H. nana and H. sanborni) and rubicundula (H. elianeae and H. jimi). Field activities were conducted at three ...
Calling sites and acoustic partitioning in species of the Hyla nana and rubicundula groups (Anura, Hylidae)
(2006-07-01)
We analysed spatial and acoustic partitioning among four species of Hyla belonging to two species-groups: nana (H. nana and H. sanborni) and rubicundula (H. elianeae and H. jimi). Field activities were conducted at three ...
Influence of emotional expression, loudness, and gender on the acoustic parameters of vibrato in classical singers
(Mosby Inc., 2012)
Objectives: Vibrato is considered one of the most essential characteristics of the classical singing voice. Vibrato can be acoustically described by the rate, extent, onset, and regularity. The aim of this study was to ...
An efficient short-time Fourier transform algorithm for grinding wheel condition monitoring through acoustic emission
(2021-03-01)
Indirect methods to monitor the surface integrity of grinding wheels by acoustic emission (AE) have been proposed, aiming to ensure their optimal performance. However, the time-frequency analysis of the content of these ...