2026-04-14T04:13:08Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1172962026-01-12T06:18:49Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Toma, Daniel author Masmitjà Rusiñol, Ivan author Río Fernández, Joaquín del author Martínez Padró, Enoc author Artero Delgado, Carola author Casale, Alessandra author Figoli, Alberto author Pinzani, Diego author Cervantes Fructuoso, Pablo author Ruiz, Pablo author Memè, Simone author Delory, Eric author 2018-05-08 This paper describes cost-efficient, innovative and interoperable ocean passive acoustics sensors systems, developed within the European FP7 project NeXOS (Next generation Low-Cost Multifunctional Web Enabled Ocean Sensor Systems Empowering Marine, Maritime and Fisheries Management) These passive acoustic sensors consist of two low power, innovative digital hydrophone systems with embedded processing of acoustic data, A1 and A2, enabling real-time measurement of the underwater soundscape. An important part of the effort is focused on achieving greater dynamic range and effortless integration on autonomous platforms, such as gliders and profilers. A1 is a small standalone, compact, low power, low consumption digital hydrophone with embedded pre-processing of acoustic data, suitable for mobile platforms with limited autonomy and communication capability. A2 consists of four A1 digital hydrophones with Ethernet interface and one master unit for data processing, enabling real-time measurement of underwater noise and soundscape sources. In this work the real-time acoustic processing algorithms implemented for A1 and A2 are described, including computational load evaluations of the algorithms. The results obtained from the real time test done with the A2 assembly at OBSEA observatory collected during the verification phase of the project are presented. Postprint (author's final draft) Àrees temàtiques de la UPC::Física::Acústica::Sons subaquàtics Underwater acoustic telemetry. Underwater acoustics. underwater acousticsdigital hydrophoneinteroperabilitymarine observationssmart interfaceembedded processing underwater noise bioacoustics Acústica submarina Smart Embedded Passive Acoustic Devices for Real-Time Hydroacoustic Surveys