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Browsing by Author "GODINHO, LUIS"

Now showing items 1-8 of 8

A finite element model of perforated panel absorbers including viscothermal effects

Carbajo San Martín, Jesús; Ramis Soriano, Jaime; Godinho, Luis; Amado-Mendes, Paulo; Alba Fernández, Jesús (Elsevier, 2015-04-01)

Most of the analytical models devoted to determine the acoustic properties of a rigid perforated panel consider the acoustic impedance of a single hole and then use the porosity to determine the impedance for the whole ...
A model for acoustic absorbent materials derived from coconut fiber

Ramis Soriano, Jaime; Rey Tormos, Romina María del; Alba Fernández, Jesús; Godinho, Luis; Carbajo, Jesús (CSIC, 2014)

[EN] In the present paper, a methodology is proposed for obtaining empirical equations describing the sound absorption characteristics of an absorbing material obtained from natural fibers, specifically from coconut. The ...
A Simple Method to Estimate the In Situ Performance of Noise Barriers

Redondo, Javier; Gaja-Silvestre, Pau; Godinho, Luis; Amado-Mendes, Paulo (MDPI AG, 2022-07)

[EN] Noise barriers are usually classified attending to their intrinsic acoustic characteristics. This is standardized by the European Standards EN 1793, parts 2 and 6, in which a single parameter, DLR or DLSI, is defined ...
An equivalent lattice-modified model of interfering Bragg bandgaps and Locally Resonant Stop Bands for phononic crystal made from Locally Resonant elements

Redondo, Javier; Godinho, Luis; Staliunas, Kestutis; Sánchez Pérez, Juan Vicente (Elsevier, 2023-08-31)

[EN] waves is a hot topic. An important class of these metamaterials is based on phononic crystals with Locally Resonant Structure, included in those commonly known as Locally Resonant Sonic Materials. In these metamaterials, ...
Numerical Evaluation of the Vibration Reduction Index for Structural Joints

Ramis Soriano, Jaime; Segovia, Enrique; Alba Fernández, Jesús; Carbajo San Martín, Jesús; Godinho, Luis (Polish Scientific Publishers, 2012)

The present paper addresses the analysis of structural vibration transmission in the presence of structural joints. The problem is tackled from a numerical point of view, analyzing some scenarios by using finite element ...
Numerical simulation of target strength measurements from near to far field of fish using the method of fundamental solutions

Pérez Arjona, Isabel; Godinho, Luis; Espinosa Roselló, Víctor (S. Hirzel Verlag, 2018)

[EN] We propose the application of a numerical model based on the Method of Fundamental Solutions to the estimation of the target strength (TS) of single fish, a crucial parameter for evaluating fish abundance when using ...
Role of material properties in acoustical target strength: Insights from two species lacking a swimbladder

Ladino-Velásquez, Anderson; Pérez Arjona, Isabel; Espinosa Roselló, Víctor; CHILLARÓN-PÉREZ, MÓNICA; Vidal-Gimeno, Vicente-Emilio; GODINHO, LUIS; Moreno, G.; Boyra, G. (Elsevier, 2024-02)

[EN] Acoustic target strength (TS) is a key parameter for species identification and stock assessment in fisheries. The TS of fish is influenced by the contrast in acoustic impedance between their tissues and the surrounding ...
The method of fundamental solutions for the analysis of infinite 3D sonic crystals

Godinho, Luis; Redondo, Javier; Amado-Mendes, P. (Elsevier, 2019)

[EN] The use of periodic structures in acoustic applications has interested the scientific community in the last two decades. Although in-depth research has been thoroughly performed, many issues have still not been solved. ...