Latest Publications & Patents on Acoustics
This is our latest selection of worldwide publications and patents in english on Acoustics, between many scientific online journals, classified and focused on acoustic, sound waves, acoustic absorption, sound pressure, acoustic impedance, frequency response, reverberation, waveform and Doppler.
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Aeroacoustic Study of Synchronized Rotors
Published on 2025-02-19 by Fabio Del Duchetto, Tiziano Pagliaroli, Paolo Candeloro, Karl-Stéphane Rossignol, Jianping Yin @MDPI
Abstract: The main goal of the present study is to explore the noise mitigation potential using an active control strategy based on rotor phase synchronization. This work is focused on the effects of the inflow velocity on the noise interference effect. The inflow velocity does not affect the phase at which the interference phenomenon is observed, as expected. On the other hand, the intensity of the pressure fluctuations is influenced by the inflow velocity for all of the rotor phase shift conditions inve[...]
Our summary: Noise mitigation potential explored through rotor phase synchronization, effects of inflow velocity on noise interference, pressure fluctuations influenced by inflow velocity.
Aeroacoustics, Synchronized Rotors, Active Control, Inflow Velocity
Publication
An Optimized PZT-FBG Voltage/Temperature Sensor
Published on 2025-02-19 by Shangpeng Sun, Feiyue Ma, Yanxiao He, Bo Niu, Cheng Wang, Longcheng Dai, Zhongyang Zhao @MDPI
Abstract: The piezoelectric grating voltage sensor has garnered significant attention in the realm of intelligent sensing, attributed to its compact size, cost-effectiveness, robust electromagnetic interference (EMI) immunity, and high network integration capabilities. In this paper, we propose a PZT-FBG (piezoelectric ceramic–fiber Bragg grating) voltage–temperature demodulation optical path architecture. This scheme effectively utilizes the originally unused temperature compe[...]
Our summary: Optimized PZT-FBG voltage/temperature sensor with improved optical path connection method, synchronous demodulation of temperature and voltage parameters, enhanced linearity and resolution of voltage sensor.
PZT-FBG, voltage sensor, temperature sensor, optical path
Publication
Characterization and Optimization of Sound Transmission Loss of PVC Foam Sandwich Structure Reinforced by Carbon Fiber Columns
Published on 2025-02-19 by Kangle Li, Zhiwei Zhou, Jichao Lei, Lixian Wang, Wenkai Dong, Yongbo Jiang, Ying Li @MDPI
Abstract: This study presents a foam sandwich structure reinforced with carbon fiber columns (FSS-CFC), which exhibits strong mechanical and sound insulation properties. The FSS-CFC consists of two face-sheets and a polyvinyl chloride (PVC) core containing multiple CFC cylinders arranged in a periodic array. The sound transmission loss (STL) measured in acoustic tube experiments closely aligns with the finite element simulation results, validating the reliability of the present research. Through character[...]
Our summary: Foam sandwich structure reinforced with carbon fiber columns exhibits strong mechanical and sound insulation properties. Sound insulation mechanism of FSS-CFC identified through characteristic analyses. FSS-CFC optimized using genetic algorithm in MATLAB and COMSOL, showing significant improvements in both mechanical and acoustic performance.
Characterization, Optimization, Sound Transmission Loss, Carbon Fiber Columns
Publication
Research on the Damage Characteristics of a UAV Flight Control System Irradiated by a Continuous Laser
Published on 2025-02-19 by Le Liu, Chengyang Xu, Sheng Cai, Jiamin Wang, Dandan Huang, Kun Yang, Changbin Zheng, Jin Guo @MDPI
Abstract: To improve laser anti-UAV technology and UAV laser protection capabilities, research on continuous laser damage to a UAV flight control system has been carried out. Combining waveform and function monitoring, the performance of the flight control system under laser irradiation was observed in real time, and the temperature and ablation process were recorded, which were used to analyze its damage characteristics and thresholds. Our experimental results show that the flight control system had two [...]
Our summary: Research on damage characteristics of UAV flight control system irradiated by continuous laser, including temporary failure and permanent damage modes with specific temperature thresholds and power density requirements for damage. Thermal effects of laser on diodes and linear regulators analyzed for permanent damage assessment.
UAV, Flight Control System, Continuous Laser, Damage Characteristics
Publication
An Integrated Hierarchical Wireless Acoustic Sensor Network and Optimized Deep Learning Model for Scalable Urban Sound and Environmental Monitoring
Published on 2025-02-19 by Bo Peng, Kevin I-Kai Wang, Waleed H. Abdulla @MDPI
Abstract: Urban sound encompasses various acoustic events, from critical safety-related sound to everyday environmental noise. In response to the need for comprehensive and scalable sound monitoring, this study introduces an integrated system combining the Hierarchical Wireless Acoustic Sensor Network (HWASN) with the new proposed end-to-end CNN-CNN-BiLSTM-Attention (CCBA) sound classification model. HWASN facilitates large-scale, scalable sound data collection and transmission through a multi-hop archite[...]
Our summary: Integrated system combining HWASN with CCBA model for comprehensive urban sound monitoring, optimized for Jetson Nano, trained using distillation techniques.
Wireless Acoustic Sensor Network, Deep Learning Model, Scalable Monitoring, Urban Sound
Publication
Doppler division multiplexing (ddm) multiple-input multiple-output (mimo) radar system and decoding method
Patent published on the 2025-02-19 in EP under Ref EP4509863 by NXP BV [NL] (Rosu Filip Alexandru [nl], Brigalda Adriana [nl], Silion Daniel [nl])
Abstract: A radar system may include transmitter modules configured to transmit multiple transmit signals in accordance with a Doppler Domain Multiplexing (DDM) scheme, receiver modules configured to receive reflections from the plurality of transmit signals reflected off an object and to generate corresponding digital signals, and a signal processor configured to generate a range-Doppler antenna cube representing the digital signals, and, for each of range bin of the cube, to generate a decoded range-Dop[...]
Our summary: Radar system with DDM and MIMO technology for signal processing and peak identification in range-Doppler antenna cube.
Doppler division multiplexing, multiple-input multiple-output, radar system, decoding method
Patent
Improved radar detection using prior tracked object information
Patent published on the 2025-02-19 in EP under Ref EP4509864 by NXP BV [NL] (Chan Lu Lu [nl], Gehrels Cornelis [nl], Sari Alp [nl], Kaneko Takeshi [nl], Paker ÖzgÜn [nl], Koppelaar Arie Geert Cornelis [nl])
Abstract: A system includes a processor and a non-transitory computer-readable medium storing machine instructions that cause the processor to perform a first fast Fourier transform (FFT) on received radar data to obtain a range-antenna data array and to perform a second FFT on the range-antenna data array to obtain a range-Doppler-antenna data cube. The processor performs peak detection on the range-Doppler-antenna data cube based on object information to obtain a subset that includes confirmed peaks and[...]
Our summary: Improved radar detection through peak detection and angle of arrival calculations using prior tracked object information for filtering candidate peaks.
radar detection, fast Fourier transform (FFT), peak detection, angle of arrival calculations
Patent
Acoustic output device
Patent published on the 2025-02-19 in EP under Ref EP4510622 by SHENZHEN SHOKZ CO LTD [CN] (Wang Zhen [cn], Liang Jianing [cn], Zhang Lei [cn], Qi Xin [cn])
Abstract: An acoustic output device comprises a housing, a first loudspeaker and a second loudspeaker disposed in the housing. The first loudspeaker includes a first diaphragm. In the housing, a first front cavity and a first rear cavity are respectively disposed on a front side and a rear side of the first diaphragm, and the first front cavity and the first rear cavity are acoustically coupled with two hole portions disposed on the housing, respectively, to output a first sound wave and a second sound wa[...]
Our summary: A housing contains two loudspeakers with diaphragms and cavities to output multiple sound waves through hole portions.
acoustic output device, loudspeaker, diaphragm, cavity
Patent
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