Results 31 to 40 of about 2,503,305 (272)

Mechanical resonator [PDF]

, 2004
A sensor and methods for making and using the same in which a mechanical resonator is employed, comprising a resonator portion for resonating in a fluid without the substantial generation of acoustic waves; and an electrical connection between the ...
Padowitz, David, Kolosov, Oleg, Matsiev, L   +2 more
core   +5 more sources

Azimuth Estimation of Multi-LFM Signals Based on Improved Complex Acoustic Intensity Method

Journal of Marine Science and Engineering, 2022
The complex acoustic intensity method is one of the common methods used for the azimuth estimation of single-vector sensors. However, this method establishes a relationship between frequency and azimuth, which limits its practical applicability for ...
Yan Wang, Zherui Wang, Yilin Wang, Wenfeng Dong, Tian Lan   +4 more
doaj   +1 more source

The Maximal Eigengap Estimator for Acoustic Vector-Sensor Processing [PDF]

, 2021
17 USC 105 interim-entered record; under review.This paper introduces the maximal eigengap estimator for finding the direction of arrival of a wideband acoustic signal using a single vector-sensor.
Foster, Jacob, Bassett, Robert, Leary, Paul, Smith, Kevin B., Gemba, Kay L.   +4 more
core   +1 more source

Frequency response characteristics of velocity type underwater acoustic sensor

Dianzi Jishu Yingyong
Sonar technology is the main method of the ocean exploration, and underwater acoustic sensor is an important part of sonar equipment. Underwater acoustic sensors are divided into scalar and vector underwater acoustic sensors.
Meng Yanyu, Luo Ming
doaj   +1 more source

Matched steering vector searching based direction-of-arrival estimation using acoustic vector sensor array

EURASIP Journal on Wireless Communications and Networking, 2019
The acoustic vector sensor (AVS) array is a powerful tool for underwater target’s direction-of-arrival (DOA) estimation without any bearing ambiguities.
Yu Ao, Ling Wang, Jianwei Wan, Ke Xu
doaj   +1 more source

A Support Vector Learning-Based Particle Filter Scheme for Target Localization in Communication-Constrained Underwater Acoustic Sensor Networks

Sensors, 2017
Target localization, which aims to estimate the location of an unknown target, is one of the key issues in applications of underwater acoustic sensor networks (UASNs).
Xinbin Li, Chenglin Zhang, Lei Yan, Song Han, Xinping Guan   +4 more
doaj   +1 more source

Evaluation of Node-Metastasis in Sparse Underwater Acoustic Sensor Networks for Localization Under Acoustically Stratified Malicious Node Conditions

IEEE Access, 2021
Malicious anchor node is a serious issue in underwater sensor networks. This problem gets compounded under sparse deployment scenario. To overcome this issue, the authors present a Compressed Sensing for Malicious node Compensation theorem (abbreviated ...
Prateek, Kundan Kumar, Krishna Pandey, Saurabh Chandra, Rajeev Arya   +4 more
doaj   +1 more source

Source separation with an acoustic vector sensor for terrestrial bioacoustics

The Journal of the Acoustical Society of America, 2022
Passive acoustic monitoring is emerging as a low-cost, non-invasive methodology for automated species-level population surveys. However, systems for automating the detection and classification of vocalizations in complex soundscapes are significantly hindered by the overlap of calls and environmental noise.
Irina Tolkova, Holger Klinck
openaire   +2 more sources

Multimodal Optoelectronic Synapses for Neuromorphic Intelligence: Coupling Light, Electrical, Thermal, and Beyond

Advanced Functional Materials, EarlyView.
This review revisits optoelectronic neuromorphic devices that extend from unimodal sensing toward multimodal perception. Five types of stimuli‐to‐output information flow that are classified based on the device roles within the system and applications are summarized and discussed.
Jihyun Shin, Junhyung Cho, Wangmyung Choi, Jaehyun Hur, Jae Kyeong Jeong, Ulrike Kraft, Hocheon Yoo   +6 more
wiley   +1 more source

Depth Discrimination for Low-Frequency Sources Using a Horizontal Line Array of Acoustic Vector Sensors Based on Mode Extraction

Sensors, 2018
Depth discrimination is a key procedure in acoustic detection or target classification for low-frequency underwater sources. Conventional depth-discrimination methods use a vertical line array, which has disadvantage of poor mobility due to the size of ...
Guolong Liang, Yifeng Zhang, Guangpu Zhang, Jia Feng, Ce Zheng   +4 more
doaj   +1 more source