This page has only limited features, please log in for full access.
Acoustic leaky-wave antennas (ALWAs) have demonstrated the capacity to steer directive sound waves in frequency-dependent directions, due to the inherent dispersive radiation characteristic of leaky modes. Compared to more conventional uniform linear array (ULA) acoustic traducers for electronic beam steering (which rely on multiple sensors), the ALWA allows for single microphone operation. Thus, ALWAs offer a direct mechanism to scan a directive acoustic beam in the angular space by simply sweeping the operating frequency of the acoustic signal, which envisions cost-efficient single-transducer direction finders for SONAR applications. In this paper, we study for the first time some important features of an ALWA for acoustic underwater Direction-of-Arrival (DoA) estimation applications. First, we report for the first time on the necessity to shape the radiated ALWA beams in both far- and near-field zones to improve the DoA estimation performance, following similar techniques recently applied for low-cost frequency-scanned direction-finding radars based on LWAs. Furthermore, the capacity to reduce the Side Lobe Level (SLL) has been analyzed in order to improve performance, demonstrating aperture tapering techniques to the ALWA for the first time. These acoustic behaviour aspects have a considerable interest in real applications of ALWA in innovative SONAR systems for underwater scenarios.
Ivan Felis-Enguix; Jorge Otero-Vega; María Campo-Valera; Isidro Villó-Pérez; J. L. Gómez-Tornero. Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding. Proceedings of 7th International Electronic Conference on Sensors and Applications 2020, 2, 93 .
AMA StyleIvan Felis-Enguix, Jorge Otero-Vega, María Campo-Valera, Isidro Villó-Pérez, J. L. Gómez-Tornero. Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding. Proceedings of 7th International Electronic Conference on Sensors and Applications. 2020; 2 (1):93.
Chicago/Turabian StyleIvan Felis-Enguix; Jorge Otero-Vega; María Campo-Valera; Isidro Villó-Pérez; J. L. Gómez-Tornero. 2020. "Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding." Proceedings of 7th International Electronic Conference on Sensors and Applications 2, no. 1: 93.
For years, in the field of underwater acoustics, a line of research with special relevance for applications of environmental monitoring and maritime security has been developed that explores the possibilities of non-linear phenomena of sound propagation, especially referring to the so-called parametric effect or self-modulation. This article shows the results of using a new modulation technique based on sine-sweep signals, compared to classical modulations (FSK and PSK). For each of these modulations, a series of 16-bit strings of information with different frequencies and durations have been performed, with the same 200 kHz carrier wave. All of them have been tested in the Hydroacoustic Laboratory of the CTN and, through the application of cross-correlation processing, the limitations and improvements of this novel processing technique have been evaluated. This allows reaching better limits in discrimination of bits and signal-to-noise ratio used in underwater parametric acoustic communications.
María Campo-Valera; Ivan Felis-Enguix; Isidro Villó-Pérez. Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication. Sensors 2020, 20, 5878 .
AMA StyleMaría Campo-Valera, Ivan Felis-Enguix, Isidro Villó-Pérez. Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication. Sensors. 2020; 20 (20):5878.
Chicago/Turabian StyleMaría Campo-Valera; Ivan Felis-Enguix; Isidro Villó-Pérez. 2020. "Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication." Sensors 20, no. 20: 5878.
A full chain simulation of the acoustic hadrontherapy monitoring for brain tumours is presented in this work. For the study, a proton beam of 100 MeV is considered. In the first stage, Geant4 is used to simulate the energy deposition and to study the behaviour of the Bragg peak. The energy deposition in the medium produces local heating that can be considered instantaneous with respect to the hydrodynamic time scale producing a sound pressure wave. The resulting thermoacoustic signal has been subsequently obtained by solving the thermoacoustic equation. The acoustic propagation has been simulated by FEM methods in the brain and the skull, where a set of piezoelectric sensors are placed. Last, the final received signals in the sensors have been processed in order to reconstruct the position of the thermal source and, thus, to determine the feasibility and accuracy of acoustic beam monitoring in hadrontherapy.
Jorge Otero; Ivan Felis; Alicia Herrero; José Antonio Diaz Merchan; Miguel Ardid. Bragg Peak Localization with Piezoelectric Sensors for Proton Therapy Treatment. Sensors 2020, 20, 2987 .
AMA StyleJorge Otero, Ivan Felis, Alicia Herrero, José Antonio Diaz Merchan, Miguel Ardid. Bragg Peak Localization with Piezoelectric Sensors for Proton Therapy Treatment. Sensors. 2020; 20 (10):2987.
Chicago/Turabian StyleJorge Otero; Ivan Felis; Alicia Herrero; José Antonio Diaz Merchan; Miguel Ardid. 2020. "Bragg Peak Localization with Piezoelectric Sensors for Proton Therapy Treatment." Sensors 20, no. 10: 2987.
In the framework of the search for dark matter in the form of WIMPs using superheated liquids, a study is conducted to establish a computational procedure aimed at determining how the thermodynamic conditions kept inside a particle detector affect the acoustic signal produced by bubble nucleation. It is found that the acoustic energy injected into the liquid by the growing vapour bubble increases as the liquid pressure is decreased and the superheat degree is increased, the former effect being crucial for the generation of a well-intelligible signal. A good agreement is met between the results of the present study and some experimental data available in the literature for the amplitude of the acoustic signal. Additionally, the higher loudness of the alpha-decay events compared with those arising from neutron-induced nuclear recoils is described in terms of multiple nucleations.
M. Ardid; Andrea Baschirotto; N. Burgio; M. Corcione; L. Cretara; M. De Matteis; I. Felis; M. Frullini; L. Manara; A. Quintino; A. Santagata; V. A. Spena; E. A. Vallicelli; L. Zanotti. Effects of the thermodynamic conditions on the acoustic signature of bubble nucleation in superheated liquids used in dark matter search experiments. The European Physical Journal C 2019, 79, 961 .
AMA StyleM. Ardid, Andrea Baschirotto, N. Burgio, M. Corcione, L. Cretara, M. De Matteis, I. Felis, M. Frullini, L. Manara, A. Quintino, A. Santagata, V. A. Spena, E. A. Vallicelli, L. Zanotti. Effects of the thermodynamic conditions on the acoustic signature of bubble nucleation in superheated liquids used in dark matter search experiments. The European Physical Journal C. 2019; 79 (11):961.
Chicago/Turabian StyleM. Ardid; Andrea Baschirotto; N. Burgio; M. Corcione; L. Cretara; M. De Matteis; I. Felis; M. Frullini; L. Manara; A. Quintino; A. Santagata; V. A. Spena; E. A. Vallicelli; L. Zanotti. 2019. "Effects of the thermodynamic conditions on the acoustic signature of bubble nucleation in superheated liquids used in dark matter search experiments." The European Physical Journal C 79, no. 11: 961.
The monitoring of the marine environment results in large amounts of data that must be processed and transmitted effectively for efficient resource management. In particular, given its high sampling rate, underwater noise signal acquisition technologies deserve special attention. In this article, a comparative study of the efficiency of different information processing and compression techniques is carried out, depending on the characteristics that want to be transmitted from the original signal. The applications and experiments carried out are focused on responding to the Marine Strategies, a marine environment planning instrument created under the Marine Strategy Framework Directive 2008/56/EC of 17 June, 2008 (MSFD), and, more specifically, to Descriptor 1, which regards the noise levels (both continuous and impulsive), as well as part of Descriptor 11, which is focused on the detection and abundance of cetaceans.
Ivan Felis; Rosa Martínez; Pablo Ruiz; Hamid Er-Rachdi. Compression Techniques of Underwater Acoustic Signals for Real-Time Underwater Noise Monitoring. Proceedings 2019, 42, 80 .
AMA StyleIvan Felis, Rosa Martínez, Pablo Ruiz, Hamid Er-Rachdi. Compression Techniques of Underwater Acoustic Signals for Real-Time Underwater Noise Monitoring. Proceedings. 2019; 42 (1):80.
Chicago/Turabian StyleIvan Felis; Rosa Martínez; Pablo Ruiz; Hamid Er-Rachdi. 2019. "Compression Techniques of Underwater Acoustic Signals for Real-Time Underwater Noise Monitoring." Proceedings 42, no. 1: 80.
Within the possibilities of non-linear acoustics, the parametric effect offers a range of acoustic applications that are currently being exploited in different areas. In underwater acoustics, environmental monitoring and security are one of the applications that can benefit from these technologies, allowing the transmission of information in a directivity controlled and efficient manner. An essential aspect for the optimal functioning of these technologies is the choice of the modulation that best suits the needs of communication. In the present work, different modulation techniques are explained, through their non-linear propagation, that allows generating the signals to be propagated. Among the modulations presented in this work, we have Amplitude Modulation (AM), Continuous Phase Frequency Shift Keying (CPFSK), and Linear Frequency Modulation (LFM) modulations normally used in communications. These modulations are performed with a modulating signal (sine and sine-sweeps type) whose non-linear demodulation determines the shape of the 1 and 0 bits, through the transmission of a bit string. With all this, comparisons are made between each technique, to obtain a more precise detection and discrimination of the bits.
María Campo-Valera; Ivan Felis. Underwater Acoustic Communication for The Marine Environment’s Monitoring. Proceedings 2019, 42, 51 .
AMA StyleMaría Campo-Valera, Ivan Felis. Underwater Acoustic Communication for The Marine Environment’s Monitoring. Proceedings. 2019; 42 (1):51.
Chicago/Turabian StyleMaría Campo-Valera; Ivan Felis. 2019. "Underwater Acoustic Communication for The Marine Environment’s Monitoring." Proceedings 42, no. 1: 51.
A full chain simulation of the acoustic hadron therapy monitoring for brain tumors is presented in this work. For the study, a proton beam of 100 MeV was considered. In the first stage, Geant4 was used to simulate the energy deposition and to study the behavior of the Bragg peak. The energy deposition in the medium produced local heating that can be considered instantaneous with respect to the hydrodynamic time scale producing a sound pressure wave. The resulting thermoacoustic signal was subsequently obtained by solving the thermoacoustic equation. The acoustic propagation was simulated by the Finite Element Method (FEM) in the brain and the skull, where a set of piezoelectric sensors were placed. Lastly, the final received signals in the sensors were processed in order to reconstruct the position of the thermal source and, thus, to determine the feasibility and accuracy of acoustic beam monitoring in hadron therapy.
Jorge Otero; Ivan Felis; Miguel Ardid; Alicia Herrero; José A. Merchán. Acoustic Bragg Peak Localization in Proton Therapy Treatment: Simulation Studies. Proceedings 2019, 42, 71 .
AMA StyleJorge Otero, Ivan Felis, Miguel Ardid, Alicia Herrero, José A. Merchán. Acoustic Bragg Peak Localization in Proton Therapy Treatment: Simulation Studies. Proceedings. 2019; 42 (1):71.
Chicago/Turabian StyleJorge Otero; Ivan Felis; Miguel Ardid; Alicia Herrero; José A. Merchán. 2019. "Acoustic Bragg Peak Localization in Proton Therapy Treatment: Simulation Studies." Proceedings 42, no. 1: 71.
Hadrontherapy has been constantly evolving in leaps and bounds since the 1950s, when the use of heavy particles was proposed as an alternative treatment to radiotherapy with gamma rays or electrons. The main objective of this treatment is to maximize the dose applied to the tumour, avoiding damage to the surrounding tissue. One of the keys to the success of hadrontherapy is to achieve instantaneous monitoring of the energy deposition in the environment. Since energy deposition leads to the generation of a thermoacoustic pulse, acoustic technologies have been tested with successful results. However, for this purpose, it is essential to increase the sensitivity of the sensors for the acoustical signal and, therefore, to optimize their geometry as a function of the beam that would be used. We have studied a PTZ material in volumetric and surface volumes through experimental measures and FEM methods. In this text, we start with numerical studies which determine the dependence of the thermoacoustic signal frequency with the energy and duration of the hadron beam.
Jorge Otero; Ivan Felis. Geometrical Parametrization of Piezoelectric Sensors for Acoustical Monitoring in Hadrontherapy. Proceedings 2019, 42, 73 .
AMA StyleJorge Otero, Ivan Felis. Geometrical Parametrization of Piezoelectric Sensors for Acoustical Monitoring in Hadrontherapy. Proceedings. 2019; 42 (1):73.
Chicago/Turabian StyleJorge Otero; Ivan Felis. 2019. "Geometrical Parametrization of Piezoelectric Sensors for Acoustical Monitoring in Hadrontherapy." Proceedings 42, no. 1: 73.
This proceeding shows the results of the investigation of the techniques of the integration, management, and visualization of massive data from the digitalization of environmental and procedural parameters of facilities that operate in the marine environment. The work focuses on three main lines: (1) research on the development of a cloud-based system for big data, which allows the hosting of the data generated by different devices to be monitored (GPS, sounds, vibrations, video, temperature, emissions, consumption, power, etc.); (2) the implementation of a first layer of analysis and visualization of information; and (3) big data analytics research for the post-processing of information. The studies will be applied to underwater noise monitoring. With this, progress has been made in another of the pillars of Web 4.0—the use of context information—as the application is in charge of intelligently processing the data of the different variables together although they are not, in principle, directly related.
Ivan Felis Enguix; Pablo Ruiz; Manuel de la Torre. Online Digitalization Technologies for Monitoring Activities in the Marine Environment. Proceedings 2019, 42, 59 .
AMA StyleIvan Felis Enguix, Pablo Ruiz, Manuel de la Torre. Online Digitalization Technologies for Monitoring Activities in the Marine Environment. Proceedings. 2019; 42 (1):59.
Chicago/Turabian StyleIvan Felis Enguix; Pablo Ruiz; Manuel de la Torre. 2019. "Online Digitalization Technologies for Monitoring Activities in the Marine Environment." Proceedings 42, no. 1: 59.
The residential and service sectors are responsible for a large portion of energy demand in modern societies. Therefore, today, buildings are expected to be energy-efficient and environmentally friendly. In this context, bioclimatic architecture and its related systems seem to show a good way to achieve this. A relevant system in this issue is the Trombe wall, under study in the present work. Although this system has been studied and implemented in cold climates (in heating mode), not so many theoretical and experimental studies have examined its operation in hot climates (in ventilation mode). To collaborate in this regard, an air-ventilation Trombe wall prototype was made and analysed, both theoretically and experimentally. The size of the prototype is 1 m height, 0.6 m width and 0.2 m length and it has an outer glass surface with a hole at the top, an air chamber, and an inner insulating panel with a hole at the bottom. These experiments were carried out both under controlled conditions in the laboratory and outside. In this sense, physical and psychrometric behaviour were obtained. As a conclusion, the system produced air currents between 0.2 and 0.4 m/s, improving the feeling of comfort by 3 °C. Thus, it demonstrates its possibility of use as a passive ventilation system. Additionally, both air temperature and speed data trends were fitted by mathematical formulation, which allows the prediction of the behaviour of the Trombe wall under different solar radiation conditions in hot climates.
Ivan Felis Enguix; Sina Ellesser; Constantino Torregrosa; María De Castro. The Trombe Wall as a Passive Air Conditioning System for Hot Climates. Proceedings 2019, 44, 7 .
AMA StyleIvan Felis Enguix, Sina Ellesser, Constantino Torregrosa, María De Castro. The Trombe Wall as a Passive Air Conditioning System for Hot Climates. Proceedings. 2019; 44 (1):7.
Chicago/Turabian StyleIvan Felis Enguix; Sina Ellesser; Constantino Torregrosa; María De Castro. 2019. "The Trombe Wall as a Passive Air Conditioning System for Hot Climates." Proceedings 44, no. 1: 7.
The reuse of shipping containers in architecture has grown in global popularity. However, few studies focus on understanding its thermodynamic behavior. The present study addresses, through numerical simulations, the transitory behavior of a typical house built with containers under different climates, both cold and warm. We examined container with different build construction and observed their effect, from completely naked to those that are coated with materials of different insulation and thermal inertia. Additionally, orientation and other design resources, such as height with respect to the ground, shadow elements, and the position of the windows, were considered. With all these multiparametric studies, quantitative conclusions were obtained that can be considered in design.
Ivan Felis Enguix; Jorge Otero Vega; Sina Ellesser. Numerical Performance of Thermodynamic Behavior of Shipping-Container Architecture. Proceedings 2019, 44, 9 .
AMA StyleIvan Felis Enguix, Jorge Otero Vega, Sina Ellesser. Numerical Performance of Thermodynamic Behavior of Shipping-Container Architecture. Proceedings. 2019; 44 (1):9.
Chicago/Turabian StyleIvan Felis Enguix; Jorge Otero Vega; Sina Ellesser. 2019. "Numerical Performance of Thermodynamic Behavior of Shipping-Container Architecture." Proceedings 44, no. 1: 9.
Recording underwater impulsive noise data is an important aspect of mitigating its environmental impact and improving maritime environmental management systems. This paper describes the method used and results of the spatial monitoring of both the baseline noise level and the impulsive noise sources in the Port of Cartagena. An autonomous vessel was equipped with a smart digital hydrophone with a working frequency range between 10 and 200 kHz and a received voltage response (RVR) of, approximately, −170 dB re 1V/µPa. A GIS map was drawn up with the spatiotemporal distribution of the basal sound pressure levels by coupling the acoustic data with the vessel’s GPS positions to identify the sources of the impulsive noise of interest and their temporal characteristics. The loading of cargo containers was identified as the main source of impulse noise. This study is the first of a series designed to obtain accurate information on underwater noise pollution and its potential impact on biodiversity in the Port of Cartagena.
Ivan Felis Enguix; Marta Sánchez Egea; Antonio Guerrero González; David Arenas Serrano. Underwater Acoustic Impulsive Noise Monitoring in Port Facilities: Case Study of the Port of Cartagena. Sensors 2019, 19, 4672 .
AMA StyleIvan Felis Enguix, Marta Sánchez Egea, Antonio Guerrero González, David Arenas Serrano. Underwater Acoustic Impulsive Noise Monitoring in Port Facilities: Case Study of the Port of Cartagena. Sensors. 2019; 19 (21):4672.
Chicago/Turabian StyleIvan Felis Enguix; Marta Sánchez Egea; Antonio Guerrero González; David Arenas Serrano. 2019. "Underwater Acoustic Impulsive Noise Monitoring in Port Facilities: Case Study of the Port of Cartagena." Sensors 19, no. 21: 4672.
Hadrontherapy makes it possible to deliver high doses of energy to cancerous tumors by using the large energy deposition in the Bragg-peak. However, uncertainties in the patient positioning and/or in the anatomical parameters can cause distortions in the calculation of the dose distribution. In order to maximize the effectiveness of heavy particle treatments, an accurate monitoring system of the deposited dose depending on the energy, beam time, and spot size is necessary. The localized deposition of this energy leads to the generation of a thermoacoustic pulse that can be detected using acoustic technologies. This article presents different experimental and simulation studies of the acoustic localization of thermoacoustic pulses captured with a set of sensors around the sample. In addition, numerical simulations have been done where thermo-acoustic pulses are emitted for the specific case of a proton beam of 100 MeV.
Jorge Otero; Ivan Felis; Miguel Ardid; Alicia Herrero. Acoustic Localization of Bragg Peak Proton Beams for Hadrontherapy Monitoring. Sensors 2019, 19, 1971 .
AMA StyleJorge Otero, Ivan Felis, Miguel Ardid, Alicia Herrero. Acoustic Localization of Bragg Peak Proton Beams for Hadrontherapy Monitoring. Sensors. 2019; 19 (9):1971.
Chicago/Turabian StyleJorge Otero; Ivan Felis; Miguel Ardid; Alicia Herrero. 2019. "Acoustic Localization of Bragg Peak Proton Beams for Hadrontherapy Monitoring." Sensors 19, no. 9: 1971.
The data recording of underwater noise is a key aspect for the prevention and improvement of management systems of maritime spaces. Thus, due to the presence of activities potentially generating impulsive noise, ports deserve special attention. This article describes and shows the results of the spatial monitoring of both the basal noise and impulsive noise sources present in port facilities. A vessel was equipped with a smart digital hydrophone with a working frequency range between 10 and 200 kHz and an RVR (Received Voltage Response) of, approximately, −170 dB @ 1 V/µPa. Coupling the acoustic data together with the GPS coordinates of the vessel, a GIS map with spatiotemporal distribution of the basal sound pressure levels was made, identifying the sources of impulsive noise of interest and its temporal characteristics. This is a preliminary step for the development of future studies on underwater noise pollution and its potential impact on biodiversity in the environment of port facilities, with the maximum guarantees possible.
Ivan Felis Enguix; Marta Sánchez Egea; Antonio Guerrero González; David Arenas. Acoustic Characterization of Impulsive Underwater Noise Present in Port Facilities: Practical Case in the Port of Cartagena. Proceedings 2018, 4, 57 .
AMA StyleIvan Felis Enguix, Marta Sánchez Egea, Antonio Guerrero González, David Arenas. Acoustic Characterization of Impulsive Underwater Noise Present in Port Facilities: Practical Case in the Port of Cartagena. Proceedings. 2018; 4 (1):57.
Chicago/Turabian StyleIvan Felis Enguix; Marta Sánchez Egea; Antonio Guerrero González; David Arenas. 2018. "Acoustic Characterization of Impulsive Underwater Noise Present in Port Facilities: Practical Case in the Port of Cartagena." Proceedings 4, no. 1: 57.
The impulse response of a piezoelectric transducer can be calculated using the electrical equivalent circuit model with the Manson method for bandwidth transducers. Nevertheless, these approaches are not sufficiently precise because the importance of the homogeneous structure medium where the transducer emits the signal in part determines the bandwidth in which it acts due to the medium interactions with the environment. This paper describes preliminary research results on piezoelectric impulse response measurements in a small space, making use of the procedure presented by Angelo Farina for transducers emitting in reverberant spaces. Combining the basics of the exponential sine sweep (ESS) method, techniques of arrival detection, and signal processing it is possible to obtain the impulse response in a piezoelectric transducer emitting in a homogeneous medium.
Jorge Otero; Ivan Felis. Measurement Transducer Impulse Response Using an Exponential Sine Sweep Method. Proceedings 2018, 4, 53 .
AMA StyleJorge Otero, Ivan Felis. Measurement Transducer Impulse Response Using an Exponential Sine Sweep Method. Proceedings. 2018; 4 (1):53.
Chicago/Turabian StyleJorge Otero; Ivan Felis. 2018. "Measurement Transducer Impulse Response Using an Exponential Sine Sweep Method." Proceedings 4, no. 1: 53.
The purpose of this project was to design and implement an autonomous system based on Arduino to monitor environmental parameters that intervene in the perception of human comfort such as temperature, humidity, and solar radiation, and use them to analyze factors related to climate control and energy efficiency in buildings. The system was tested in laboratory conditions as well as by in situ measurements of building elements and living spaces. Some of the experiments carried out were contrasted with numerical simulations that allowed us to understand the implemented system.
María De Castro; Ivan Felis; Constantino Torregrosa; Jorge Otero; Sina Ellesser. Design of an Open-Source Monitoring System for Thermodynamic Analysis of Buildings and Systems. Proceedings 2018, 4, 54 .
AMA StyleMaría De Castro, Ivan Felis, Constantino Torregrosa, Jorge Otero, Sina Ellesser. Design of an Open-Source Monitoring System for Thermodynamic Analysis of Buildings and Systems. Proceedings. 2018; 4 (1):54.
Chicago/Turabian StyleMaría De Castro; Ivan Felis; Constantino Torregrosa; Jorge Otero; Sina Ellesser. 2018. "Design of an Open-Source Monitoring System for Thermodynamic Analysis of Buildings and Systems." Proceedings 4, no. 1: 54.
Hadrontherapy makes it possible to deliver high doses of energy to cancerous tumors by using the large energy deposition in the Bragg-peak. However, uncertainties in the patient positioning and or in the anatomical parameters can cause distortions in the calculation of the dose distribution. In order to maximize the effectiveness of heavy particle treatments, an accurate monitoring system of the deposited dose depending on the energy, the beam time, and the spot size is necessary. The localized deposition of this energy leads to the generation of a thermoacoustic pulse that can be detected using acoustic technologies. This article presents different experimental and simulation studies of the acoustic localization of thermoacoustic pulses by generating similar signals that have been captured with a set of sensors around the samples. In addition, numerical simulations have been done where thermoacoustic pulses are emitted for the specific case of a proton beam of 100 MeV.
Jorge Otero; Miguel Ardid; Ivan Felis; Alicia Herrero. Acoustic Location of Bragg Peak for Hadrontherapy Monitoring. Proceedings 2018, 4, 6 .
AMA StyleJorge Otero, Miguel Ardid, Ivan Felis, Alicia Herrero. Acoustic Location of Bragg Peak for Hadrontherapy Monitoring. Proceedings. 2018; 4 (1):6.
Chicago/Turabian StyleJorge Otero; Miguel Ardid; Ivan Felis; Alicia Herrero. 2018. "Acoustic Location of Bragg Peak for Hadrontherapy Monitoring." Proceedings 4, no. 1: 6.
This paper presents a study of different types of parametric signals with application to underwater acoustic communications. In all the signals, the carrier frequency is 200 kHz, which corresponds to the resonance frequency of the transducer under study and different modulations are presented and compared. In this sense, we study modulations with parametric sine sweeps (4 to 40 kHz) that represent binary codes (zeros and ones), getting closer to the application in acoustic communications. The different properties of the transmitting signals in terms of bit rate reconstruction, directivity, efficiency, and power needed are discussed as well.
María Campo-Valera; Miguel Ardid; Dídac D. Tortosa; Ivan Felis; Juan A. Martínez-Mora; Carlos D. Llorens; Pablo Cervantes. Acoustic Parametric Signal Generation for Underwater Communication. Sensors 2018, 18, 2149 .
AMA StyleMaría Campo-Valera, Miguel Ardid, Dídac D. Tortosa, Ivan Felis, Juan A. Martínez-Mora, Carlos D. Llorens, Pablo Cervantes. Acoustic Parametric Signal Generation for Underwater Communication. Sensors. 2018; 18 (7):2149.
Chicago/Turabian StyleMaría Campo-Valera; Miguel Ardid; Dídac D. Tortosa; Ivan Felis; Juan A. Martínez-Mora; Carlos D. Llorens; Pablo Cervantes. 2018. "Acoustic Parametric Signal Generation for Underwater Communication." Sensors 18, no. 7: 2149.
This paper presents a study of different types of parametric signals with application to submarine acoustic telecommunications. In all of them, the carrier frequency is 200 kHz, which corresponds to that resonation of the transducer under study, while they differ by the different modulations they present. In this sense, we study modulations with sweeps (4 to 40 kHz), in which represent binary codes (zeros and ones), getting closer to the application in acoustic telecommunications. The different properties of the transmitting signals in terms of communication speed, directivity, efficiency and power needed are discussed as well.
Miguel Ardid; María Campo-Valera; Dídac D. Tortosa; Ivan Felis; Carlos D. Llorens; Juan A. Martínez-Mora. Underwater Communication Using Acoustic Parametric Arrays. Proceedings 2017, 2, 139 .
AMA StyleMiguel Ardid, María Campo-Valera, Dídac D. Tortosa, Ivan Felis, Carlos D. Llorens, Juan A. Martínez-Mora. Underwater Communication Using Acoustic Parametric Arrays. Proceedings. 2017; 2 (3):139.
Chicago/Turabian StyleMiguel Ardid; María Campo-Valera; Dídac D. Tortosa; Ivan Felis; Carlos D. Llorens; Juan A. Martínez-Mora. 2017. "Underwater Communication Using Acoustic Parametric Arrays." Proceedings 2, no. 3: 139.
A short bipolar pressure pulse with “pancake” directivity is produced and propagated when an Ultra-High Energy (UHE) neutrino interacts with a nucleus in water. Nowadays, acoustic sensor networks are being deployed in deep seas to detect this phenomenon as a first step toward building a neutrino telescope. In order to study the feasibility of the method, it is critical to have a calibrator that is able to mimic the neutrino signature. In previous works the possibility of using the acoustic parametric technique for this aim was proven. In this study, the array is operated at a high frequency and, by means of the parametric effect, the emission of the low-frequency acoustic bipolar pulse is generated mimicking the UHE neutrino acoustic pulse. To this end, the development of the transducer to be used in the parametric array is described in all its phases. The transducer design process, the characterization tests for the bare piezoelectric ceramic, and the addition of backing and matching layers are presented. The efficiencies and directivity patterns obtained for both primary and parametric beams confirm that the design of the proposed calibrator meets all the requirements for the emitter.
María Saldaña; Carlos D. Llorens; Ivan Felis; Juan Antonio Martínez-Mora; Miguel Ardid. Transducer Development and Characterization for Underwater Acoustic Neutrino Detection Calibration. Sensors 2016, 16, 1210 .
AMA StyleMaría Saldaña, Carlos D. Llorens, Ivan Felis, Juan Antonio Martínez-Mora, Miguel Ardid. Transducer Development and Characterization for Underwater Acoustic Neutrino Detection Calibration. Sensors. 2016; 16 (8):1210.
Chicago/Turabian StyleMaría Saldaña; Carlos D. Llorens; Ivan Felis; Juan Antonio Martínez-Mora; Miguel Ardid. 2016. "Transducer Development and Characterization for Underwater Acoustic Neutrino Detection Calibration." Sensors 16, no. 8: 1210.