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Browsing by Subject "Underwater acoustics"

Now showing items 1-14 of 14

A Compact Array Transducer for Full Calibration of Underwater Acoustic Detection Neutrino Telescopes

Ardid Ramírez, Miguel; Tortosa, Dídac D.; Martínez Mora, Juan Antonio (IEEE, 2019-10-25)

[EN] KM3NeT, the underwater neutrino telescope in the Mediterranean Sea, is a detector under construction. KM3NeT uses Digital Optical Modules (DOMs) to detect neutrinos but there will be a study about the viability to ...
Acoustical estimation of fish biomass: species identification and stocks management

Espinosa Roselló, Víctor; Calise, Lucio; Estruch, V. D.; Llorens Escrich, Susana; Ordoñez Cebrián, Patricia; Pérez Arjona, Isabel; Puig Pons, Vicente; Soliveres, Ester (Associazione Italiana di Acustica, 2015)

[EN] Acoustics is the basics of the most important technologies for underwater telecommunication, as well as for target detection and identification in the aquatic media. Multiple frequency measurements are the key for ...
Automatic Bluefin Tuna (Thunnus thynnus) biomass estimation during transfers using acoustic and computer vision techniques

Puig Pons, Vicente; Muñoz-Benavent, Pau; Espinosa Roselló, Víctor; Andreu García, Gabriela; Valiente González, José Miguel; Estruch, V. D.; Ordoñez-Cebrian, Patricia; Pérez Arjona, Isabel; Atienza-Vanacloig, Vicente; Mèlich, Begonya; De la Gandara García, Fernando; Santaella, E. (Elsevier, 2019)

[EN] In this work, acoustic and computer vision techniques are combined to develop an automatic procedure for biomass estimation of tuna during transfers. A side scan sonar working at 200¿kHz and a stereo camera, positioned ...
Automatic Bluefin Tuna Sizing with a Combined Acoustic and Optical Sensor

Muñoz-Benavent, Pau; Puig Pons, Vicente; Andreu García, Gabriela; Espinosa Roselló, Víctor; Atienza-Vanacloig, Vicente; Pérez Arjona, Isabel (MDPI AG, 2020-09)

[EN] A proposal is described for an underwater sensor combining an acoustic device with an optical one to automatically size juvenile bluefin tuna from a ventral perspective. Acoustic and optical information is acquired ...
Design and Application of a Passive Acoustic Monitoring System in the Spanish Implementation of the Marine Strategy Framework Directive

Lara, Guillermo; Bou-Cabo, Manuel; Esteban, José Antonio; Espinosa Roselló, Víctor; Miralles Ricós, Ramón (MDPI, 2019-11-30)

[EN] A passive acoustic monitoring (PAM) device named SAMARUC has been developed to acquire underwater sounds following the specifications of the Monitoring Guidance for Underwater Noise in European Seas: Monitoring Guidance ...
Detección acústica de la tortuga boba (Caretta caretta) mediante técnicas activas

Alonso Alonso, Enrique (Universitat Politècnica de València, 2014-11-26)

Sobre una especie protegida, como son las tortugas marinas, para comprobar el éxito de los protocolos de protección y estimar el estado de conservación, es necesaria la realización de censos. Actualmente se realizan ...
Diseño de un circuito electrónico de muy bajo consumo y gran capacidad de almacenamiento adaptado a las necesidades marcadas por la Marine Strategy Framework Directive de la Unión Europea

Lara Martínez, Guillermo Fernán (Universitat Politècnica de València, 2022-10-14)

[ES] Se propone la realización del diseño de un circuito electrónico de muy baja potencia para un sistema autónomo alimentado con baterías tipo D que permita almacenar más de 8 Tbytes de datos acústicos submarinos en ...
Efficiency of parametric ultrasound generation in relaxing media for very shallow-water echo sounders

Ordoñez-Cebrian, Patricia; Jimenez, Noe; Espinosa Roselló, Víctor; Puig Pons, Vicente; Soliveres, Ester (2014-04)

Parametric acoustic generation provides the possibility to obtain narrow and nearly side-lobe free acoustic beams for low frequencies. In this way, the nonlinear interaction of two intense beams with close frequencies ...
Estimation of Bluefin Tuna (Thunnus thynnus) mean length in sea cages by acoustical means

Puig Pons, Vicente; Muñoz-Benavent, Pau; Pérez Arjona, Isabel; Ladino-Velásquez, Anderson; Llorens-Escrich, Susana; Andreu García, Gabriela; Valiente González, José Miguel; Atienza-Vanacloig, Vicente; Ordoñez-Cebrian, Patricia; Pastor Gimeno, José Ismael; Espinosa Roselló, Víctor (Elsevier, 2022-08)

[EN] This paper proposes an indirect method to estimate Bluefin Tuna (Thunnus thynnus) biomass in cages using acoustic techniques. Two Simrad EK60 echosounders working at 120 and 200 kHz and a stereo camera were used to ...
Medida de las características acústicas de los tejidos de las principales especies de túnidos tropicales

García Talavera, Lucía (Universitat Politècnica de València, 2017-10-25)

Tuna is a very popular fish in the feeding in almost the whole world and, in turn, several of its species are catalogued as threatened or in danger of extinction. Due to the shortage caused by overfishing, as well as to ...
New Insights into the Design and Application of a Passive Acoustic Monitoring System for the Assessment of the Good Environmental Status in Spanish Marine Waters

Lara Martínez, Guillermo-Fernan; Miralles Ricós, Ramón; Bou-Cabo, Manuel; Esteban, José Antonio; Espinosa Roselló, Víctor (MDPI AG, 2020-09)

[EN] Passive acoustic monitoring systems allow for non-invasive monitoring of underwater species and anthropogenic noise. One of these systems has been developed keeping in mind the need to create a user-friendly tool to ...
R&D towards the acoustic positioning system of KM3NeT

Ardid Ramírez, Miguel; Bou Cabo, Manuel; Camarena Femenia, Francisco; Espinosa Roselló, Víctor; Larosa, Giuseppina; Llorens Alvarez, Carlos David; Martínez Mora, Juan Antonio (Elsevier, 2011-01-11)

[EN] In this paper we present a possible solution for the acoustic positioning system of KM3NeT, a future very large undersea neutrino telescope. The system consists of an array of budget-priced acoustic transducers that ...
Removing interference components in time frequency representations using morphological operators

Gómez García, Soledad; Naranjo Ornedo, Valeriana; Miralles Ricós, Ramón (Elsevier, 2011-07)

Time-frequency representations have been of great interest in the analysis and classification of non-stationary signals. The use of highly selective transformation techniques is a valuable tool for obtaining accurate ...
Técnicas numéricas aplicadas a la propagación de sonido en el medio marino

Remiro Gargallo, Andrea Vicenta (Universitat Politècnica de València, 2019-10-16)

[ES] Como bien indica unas de las características más importantes y nos concierne a la mayoría de nosotros dentro de la aplicación de la propagación acústica en el marco de la estrategia marina (MSFD), es que el medio ...