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Acoustic Sensors and Their Applications—2nd Edition
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Acoustic Sensors and Their Applications—2nd Edition

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Intelligent Sensors".

Deadline for manuscript submissions: 10 January 2025 | Viewed by 2899

Special Issue Editors

Dr. Farook Sattar

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada
Interests: hydrophones; acoustic signal processing; signal classification; Big Data; acoustic devices; acoustic signal detection; data analysis; filter banks; data mining; ecology; environmental science computing; feature extraction; feature selection; feedforward neural nets; geophysical signal processing
Special Issues, Collections and Topics in MDPI journals
Dr. Niladri Bihari Puhan

E-Mail Website
Co-Guest Editor
School of Electrical Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar 752050, India
Interests: signal and image processing; computer vision; machine learning & deep learning; medical image analysis; biometrics
Dr. Reza Fazel-Rezai

E-Mail Website
Co-Guest Editor
Department of Electrical Engineering, Americal Public University, Charles Town, WV 25414, USA
Interests: machine learning and deep learning applied to signal and image processing; computer vision; brain-computer interface; seizure detection and prediction based on brain signals; neurofeedback applications

Special Issue Information

Dear Colleagues,

Acoustic sensors have been in commercial use for more than 60 years. Acoustic sensing technologies have been studied extensively, and the information, transmission, reception, transformation, processing and application of acoustic signals have been developed, with acoustic sensors as central focus. An acoustic sensor is a device that converts a sound wave signal into an electrical signal.

The Special Issue, entitled “Acoustic Sensors and Their Applications” will present original research and critical review articles covering recent advances in all aspects of the development, production, testing, and application of acoustic sensors. Authors are invited to present on advanced research trends in acoustic sensors technology combined with other physical principles (conductometric, optic, calorimetric, etc.).

Dr. Farook Sattar
Dr. Niladri Bihari Puhan
Dr. Reza Fazel-Rezai
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrophones
  • acoustic signal processing
  • acoustic signal classification
  • acoustic devices
  • acoustic signal detection
  • data analysis
  • channel bank filters
  • feature extraction
  • medical signal detection
  • mixture models
  • patient diagnosis

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Related Special Issue

Published Papers (3 papers)

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Research

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18 pages, 8812 KiB  
Article
A Method for Real-Time Measurement of the Vertical Vortex at Flood Discharge Outlets Using Ultrasonic Sensors
by Dingfan Fan, Min Yu, Zhixiang Yao, Yang Du and Hang Liu
Sensors 2024, 24(17), 5583; https://doi.org/10.3390/s24175583 - 28 Aug 2024
Viewed by 613
Abstract
In this study, ultrasonic sensors were used to measure the vertical vortex at flood discharge outlets in real time, and numerical simulations and model experiments were conducted. When a sound signal passes through a vortex, its propagation characteristics will change, which helps to [...] Read more.
In this study, ultrasonic sensors were used to measure the vertical vortex at flood discharge outlets in real time, and numerical simulations and model experiments were conducted. When a sound signal passes through a vortex, its propagation characteristics will change, which helps to determine the existence of the vortex. Moreover, its characteristic parameters can be obtained through inversion. In this paper, first, the theories of acoustic measurement methods were introduced and their feasibility was verified through a comparison between Particle Image Velocimetry (PIV) measurement and numerical simulation results. Then, the Computational Fluid Dynamics (CFD) method was used to simulate the vertical vortex at the flood discharge outlets of hydraulic structures and the simulation data were restored to the actual size at scale. Finally, acoustic numerical simulations of actual vortex data were conducted, and ultrasonic sensors were used to measure the velocity of a simplified vertical vortex model under laboratory conditions. The research results indicate that the acoustic measurement method proposed in this article is effective in the measurement of the characteristic parameters of vertical vortex with a core radius of 0.03~0.05 m and a maximum tangential velocity of 0.5 m/s, the measurement error of the maximum tangential velocity is within 10%. Full article
(This article belongs to the Special Issue Acoustic Sensors and Their Applications—2nd Edition)
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15 pages, 3841 KiB  
Article
Dispersion Influence of Electroacoustic Transducer Parameters in the Design Process of Miniature Loudspeaker Arrays and Omnidirectional Sound Sources
by Bartlomiej Chojnacki
Sensors 2024, 24(15), 4958; https://doi.org/10.3390/s24154958 - 31 Jul 2024
Viewed by 607
Abstract
Electroacoustic transducers represent one of the crucial materials used in the construction of loudspeaker arrays. The dispersion in their parameters may influence the performance of a speaker set. Parametric loudspeaker arrays and omnidirectional sound sources have been used for years. However, the possible [...] Read more.
Electroacoustic transducers represent one of the crucial materials used in the construction of loudspeaker arrays. The dispersion in their parameters may influence the performance of a speaker set. Parametric loudspeaker arrays and omnidirectional sound sources have been used for years. However, the possible influence of transducer manufacturing tolerances on the arrays’ performance has not been investigated. In previous research, the sources of possible dispersion in acoustic measurements carried out with omnidirectional sources were studied, pointing out that the problems with sound sources may be a significant reason behind the small measurement repeatability in standards. This paper investigated the measurement of several common types of miniature speakers, using 10 pieces of each type and investigating the influence of their parameter dispersion in electric and acoustic ways. Numerical simulations of omnidirectional sound sources were performed to investigate the drivers’ dispersion influence sensitivity. The results provided proof of the small-signal parameter dispersion reaching 20% of the variation. The acoustic measurements show that the loudspeakers may differ in sensitivity parameters by up to 4 dB in 10 transducer tests. The analysis of an example multitransducer array indicated that a dispersion of a sensitivity higher than 1 dB might lead to significant misperformance in constructed arrays and measurement deviations with this type of array. Full article
(This article belongs to the Special Issue Acoustic Sensors and Their Applications—2nd Edition)
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Review

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22 pages, 1271 KiB  
Review
Hydrogen-Bond Acidic Materials in Acoustic Wave Sensors for Nerve Chemical Warfare Agents’ Detection
by Michał Grabka, Krzysztof Jasek and Zygfryd Witkiewicz
Sensors 2024, 24(8), 2477; https://doi.org/10.3390/s24082477 - 12 Apr 2024
Cited by 1 | Viewed by 1079
Abstract
The latest trends in the field of the on-site detection of chemical warfare agents (CWAs) involve increasing the availability of point detectors to enhance the operational awareness of commanders and soldiers. Among the intensively developed concepts aimed at meeting these requirements, wearable detectors, [...] Read more.
The latest trends in the field of the on-site detection of chemical warfare agents (CWAs) involve increasing the availability of point detectors to enhance the operational awareness of commanders and soldiers. Among the intensively developed concepts aimed at meeting these requirements, wearable detectors, gas analyzers as equipment for micro- and mini-class unmanned aerial vehicles (UAVs), and distributed sensor networks can be mentioned. One of the analytical techniques well suited for use in this field is surface acoustic wave sensors, which can be utilized to construct lightweight, inexpensive, and undemanding gas analyzers for detecting CWAs. This review focuses on the intensively researched and developed variant of this technique, utilizing absorptive sensor layers dedicated for nerve CWAs’ detection. The paper describes the mechanism of the specific interaction occurring between the target analyte and the sensing layer, which serves as the foundation for their selective detection. The main section of this paper includes a chronological review of individual achievements in the field, largely based on the peer-reviewed scientific literature dating back to the mid-1980s to the present day. The final section presents conclusions regarding the prospects for the development of this analytical technique in the targeted application. Full article
(This article belongs to the Special Issue Acoustic Sensors and Their Applications—2nd Edition)
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