Results 11 to 20 of about 721,936 (269)

The Effect of Mesoscale Eddy on the Characteristic of Sound Propagation

Journal of Marine Science and Engineering, 2021
A mesoscale eddy is detected and tracked in the western North Pacific region. Within the life cycle of the cyclonic eddies, the intensities of eddies make a difference. Satellite images indicate the oceanic eddy keeps westward-moving until it disappears.
Jiaqi Liu, Shengchun Piao, Lijia Gong, Minghui Zhang, Yongchao Guo, Shizhao Zhang   +5 more
doaj   +1 more source

Efficacy of the LiSN & Learn auditory training software: randomized blinded controlled study

Audiology Research, 2012
Children with a spatial processing disorder (SPD) require a more favorable signal-to-noise ratio in the classroom because they have difficulty perceiving sound source location cues. Previous research has shown that a novel training program - LiSN & Learn
Sharon Cameron, Helen Glyde, Harvey Dillon   +2 more
doaj   +1 more source

Design and Experiments of a Portable Seabed Integrated Detection Sonar

Sensors, 2021
The integrated observation of seabed topography, sediment geomorphology and sub-bottom profile information is very important for seabed remote sensing and mapping.
Jingxin Ma, Haisen Li, Jianjun Zhu, Weidong Du, Chao Xu, Xinyang Wang   +5 more
doaj   +1 more source

Research and Fabrication of Broadband Ring Flextensional Underwater Transducer

Sensors, 2021
At present, high-speed underwater acoustic communication requires underwater transducers with the characteristics of low frequency and broadband. The low-frequency transducers also are expected to be low-frequency directional for realization of point-to ...
Jiuling Hu, Lianjin Hong, Lili Yin, Yu Lan, Hao Sun, Rongzhen Guo   +5 more
doaj   +1 more source

Rapid characterisation of mixtures of hydrogen and natural gas by means of ultrasonic time-delay estimation [PDF]

Journal of Sensors and Sensor Systems
The implementation of the “power-to-gas” concept, where hydrogen and natural gas are blended and transported in the existing network, requires a quick, on-site method to monitor the content of hydrogen in the mixture. We evaluate a rapid characterisation
J. M. Monsalve, U. Völz, M. Jongmanns, B. Betz, S. Langa, C. Ruffert, J. Amelung, M. Wiersig   +7 more
doaj   +1 more source

Improved high-precision approach based on deconvolution in MIMO sonar imagery

The Journal of Engineering, 2019
Multiple-input multiple-output (MIMO) sonar enables high-resolution imaging, which is extremely useful in underwater acoustic high-precision imagery.
Lu Yan, Shengchun Piao, Feng Xu
doaj   +1 more source

Sparse Bayesian Learning Based Direction-of-Arrival Estimation under Spatially Colored Noise Using Acoustic Hydrophone Arrays

Journal of Marine Science and Engineering, 2021
Direction-of-arrival (DOA) estimation in a spatially isotropic white noise background has been widely researched for decades. However, in practice, such as underwater acoustic ambient noise in shallow water, the ambient noise can be spatially colored ...
Guolong Liang, Zhibo Shi, Longhao Qiu, Sibo Sun, Tian Lan   +4 more
doaj   +1 more source

An Underwater Target Localization Method Utilizing Hydroacoustic Communication Signals With a Towed Cylindrical Array

IEEE Access
Underwater target localization using a towed cylindrical array and underwater acoustic communication signals is well-suited for large-area underwater searches, offering high positioning accuracy, operational flexibility, and efficiency.
Yongshou Yang, Wenjing Cao, Jiawang Jing, Qing Hu, Weixin Kong, Guangbiao Chen, Zhongkang Wang   +6 more
doaj   +1 more source

Sparse Bayesian Learning for Channel Estimation in Time-Varying Underwater Acoustic OFDM Communication

IEEE Access, 2018
In this paper, we study the sparse Bayesian learning (SBL) framework for channel estimation in underwater acoustic (UWA) orthogonal frequency-division multiplexing (OFDM) communication systems, which provides a desirable property of preventing structural
Gang Qiao, Qingjun Song, Lu Ma, Songzuo Liu, Zongxin Sun, Shuwei Gan   +5 more
doaj   +1 more source

Industrial archaeoacoustics, methods and applications in heritage safeguarding. The case of the MNACTEC Territorial System project “The Sounds of Industry”

Treballs d'Arqueologia
Archaeoacoustics, an interdisciplinary field that combines archaeology, acoustics and computer modeling, traditionally researches the sonic dimensions of ancient cultures, revealing insights beyond conventional methods.
Emilio Marx, Ginebra Raventós de Volart, Edgardo Gómez Ortiz   +2 more
doaj   +1 more source