Results 151 to 160 of about 1,335,366 (185)
Some of the next articles are maybe not open access.
An ensemble source spectra model for merchant ship-radiated noise
The Journal of the Acoustical Society of America, 2002This paper presents an evaluation of the classical model for determining an ensemble of the broadband source spectra of the sound generated by individual ships and proposes an alternate model to overcome the deficiencies in the classical model. The classical model, proposed by Ross [Mechanics of Underwater Noise (Pergamon, New York, 1976)] postulates ...
Stephen C, Wales, Richard M, Heitmeyer
openaire +2 more sources
Ship-radiated noise-field characterization
The Journal of the Acoustical Society of America, 1997Sonobuoy measurements of merchant ships were processed for mean levels and fluctuation dynamics of the broadband and line components from a large database of ships. Direct path results are reported. The mean levels are compared with various ship source level models.
openaire +1 more source
On the active control of spectral lines of ship radiated noise
2014 12th International Conference on Signal Processing (ICSP), 2014By properly setting up a secondary sound source on ship's shell, it is theoretically feasible to suppress ship radiated noise in a local region. Since low frequency line spectrum of ship radiated noise contains significant signature information, its active control has always been an important research task.
Yuan Zheng, Chengjun Hu, Hanbo Zhao
openaire +1 more source
Similarity Evaluation of Ship Radiated Noise’s Continuous Spectrum
2018 14th IEEE International Conference on Signal Processing (ICSP), 2018Similarity evaluation of ship radiated noise’s continuous spectrum is indispensable for applications such as underwater target identification, ship status monitoring, etc. The evaluation mainly consists of two signal processing steps: feature extraction of continuous spectrum, calculation of feature similarity.
Yuan ZHENG, Zhizhong LI, Bin JIANG
openaire +1 more source
Research on Ship-Radiated Noise Beat Tune Future
2014 Seventh International Symposium on Computational Intelligence and Design, 2014Starting from human subject feeling, ship-radiated noise beat tune future is researched based on psychoacoustics. The relationships between beat tune and the shaft frequency harmonic structure of DEMON are found. Harmonic structures between targets of different types are different, and beat tunes are also different.
Jiaxing Qiu, Jingcheng Zhang
openaire +1 more source
Noise Control Engineering Journal, 2016
Ensemble empirical mode decomposition method (EEMD) is important improvement of the empirical mode decomposition (EMD), but it still leaves some annoying difficulties unresolved, such as large computational cost and reconstruction error. To solve above problems of the EEMD, a new method named EEMD of adaptive noise (EEMDAN) is proposed, which can ...
Yang Hong, Li Ya-an, Li Guo-Hui
openaire +1 more source
Ensemble empirical mode decomposition method (EEMD) is important improvement of the empirical mode decomposition (EMD), but it still leaves some annoying difficulties unresolved, such as large computational cost and reconstruction error. To solve above problems of the EEMD, a new method named EEMD of adaptive noise (EEMDAN) is proposed, which can ...
Yang Hong, Li Ya-an, Li Guo-Hui
openaire +1 more source
Simulation of Ship-radiated Noise Based on Shallow Marine Environment
2019 IEEE International Conference on Signal, Information and Data Processing (ICSIDP), 2019Ship-radiated noise is the information source for underwater target detection, and it is the basis for sonar and underwater weapons to search and attack the passive targets. In this paper, the hydroacoustic characteristics of ship-radiated noise is studied firstly.
Yeye Liu +4 more
openaire +1 more source
Signatures Extraction of Ship Radiated Noise Based on Passive Sonar
Applied Mechanics and Materials, 2014By combining likelihood estimation method and Kalman filtering tracking approach, feature extraction algorithm was developed in this paper to extract the harmonic feature from the underwater noise radiated by different kinds of ships. The ability of harmonic features extrication algorithm is demonstrated by simulation and real shallow water data set ...
Hong Ji Wang, Ri Jie Yang, Jian Hui Han
openaire +1 more source
Modulation spectrum simulation according to measured ship radiated noise
2016 IEEE 13th International Conference on Signal Processing (ICSP), 2016Modulation spectrum simulation is important for the simulation of ship radiated noise, because the modulation spectrum contains abundant characteristics of ship target. To satisfy various research requirements for the simulation of ship radiated noise's modulation spectrum, reconstruction method is utilized based on measured ship radiated noise.
Zheng Yuan, Xu Shichang
openaire +1 more source
Design of Ship Radiated Noise Signal Generator Based on FPGA
2019 IEEE International Conference on Signal, Information and Data Processing (ICSIDP), 2019The rapid development of FPGA provides a new platform for target signal simulation. Firstly, the components of ship radiated noise are analyzed in the paper. Then a module of ship radiated noise signal generator based on FPGA is designed, generating 20Hz-10kHz frequency band noise to simulate ship radiated noise.
Hu Chen +5 more
openaire +1 more source