Article
Engineering, Mechanical
In-Jee Jung, Jeong-Guon Ih
Summary: By using the 3D intensimetry algorithm, a sensor probe with a compact array cluster is able to estimate the direction of arrival at low frequencies. A super compact 3D sound camera is designed to calculate the three-dimensional intensity vectors based on measured pressure data. The implementation requires minimizing scattering and directional response irregularities. The results show accurate localization of voices and real-time tracking of speakers wearing face masks.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Rui Wang, Zhe Chen, Fuliang Yin
Summary: This article proposes a microphone frequency response calibration method based on the consensus strategy, using adaptive calibration filters to compensate for frequency response mismatches among microphones. By using the consensus strategy to design calibration filters in each microphone channel, the method is robust to room impulse response and noise differences among microphones, outperforming gain calibration methods and centralized frequency response calibration methods.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Acoustics
Jikang Li, Desen Yang, Guangzhi Chen, Song Li, Haoyang Zhang
Summary: This paper analyzes the parametric sound field in a waveguide and studies the influences of the flow velocity and surface fluctuation on the order of parametric difference frequency sound selective excitation. The results show that the flow velocity and surface fluctuation in the waveguide affect the amplitude, phase, and modal excitation of the difference-frequency sound field.
Article
Acoustics
Colin VanDercreek, Francesco Avallone, Daniele Ragni, Mirjam Snellen
Summary: This study used a finite element (FE) solver to evaluate the impact of cavities on standing wave characteristics and found that countersunk and conical cavities improve the overall response. The findings also revealed that the shape of the external foam holder drives the standing wave characteristics for melamine foam cavities.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Mechanical
Shilin Sun, Tianyang Wang, Fulei Chu, Jianxin Tan
Summary: The proposed method achieves high accuracy and efficiency in source identification through an integrated model and group sparsity, capable of handling various noise levels and source frequencies with less computing time.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Optics
Zhihui Luo, Bo Lu, Jianglou Huang, Changyan Ran, Huiling He
Summary: This study proposes a sound source direction-of-arrival (DOA) estimation method for a microphone array based on ultra-weak fiber Bragg grating (UW-FBG) distributed acoustic sensor. The system utilizes a series linear array with three UW-FBG microphones and combines convolutional recurrent neural networks for DOA estimation. Experimental results show that the method has good potential in distributed sound source localization.
Article
Engineering, Electrical & Electronic
Wei Wang, Shili Chen, Rui Wang
Summary: This article aims to simplify the methods and design a feasible array within the constraints of the microphone number and available area. An irregular array designed by the eigen distance among microphones is proposed to break through the beamforming limitation. Compared with the traditional regular array, the irregular array possesses balanced characteristics over a wide frequency range of interest and achieves small localization deviation.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Ming-An Chung, Hung-Chi Chou, Chia-Wei Lin
Summary: This study successfully achieved sound source localization in an indoor environment using two microphone arrays and the TDOA algorithm, and the experimental results demonstrate the feasibility of the system.
Article
Multidisciplinary Sciences
Ivana Kovacic, Zeljko Kanovic
Summary: This study utilizes a harmonic excitation on a metal plate to visualize vibration modes using scattered grains and a camera, and measures the responses using an accelerometer and a microphone. The symmetry between vibration and acoustic responses is shown to be an identifier for pattern recognition.
Article
Acoustics
Meiling Hu, Jing Lu
Summary: Acoustic contrast control (ACC) is a commonly utilized sound zone control method, with the time-domain formulation preferred for its ability to optimize the entire bandwidth in a single step. However, researchers have noted uneven frequency response in TACC, which requires further investigation for a convincing theoretical explanation.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Chemistry, Analytical
Nathan Itare, Jean-Hugh Thomas, Kosai Raoof, Torea Blanchard
Summary: The development of UAVs brings opportunities and threats, and dealing with these threats requires good techniques. This study proposes an acoustic method for locating UAVs using a microphone array and time domain Delay and Sum Beamforming. By considering the acoustic signature of the UAV and calculating the content related to this signature, the method achieves robustness to noise.
Article
Engineering, Electrical & Electronic
Michael Clayton, Lin Wang, Andrew McPherson, Andrea Cavallaro
Summary: This study presents an embedded multichannel sound acquisition and recording system with eight microphones mounted on a quadcopter. The system can record the sound from multiple microphones simultaneously, store the data locally for on-device processing, and transmit the multichannel audio via wireless communication for remote processing. Experimental results show that the ego-noise reduction performance of the microphone array varies depending on the array placement and the location of the target sound.
IEEE SENSORS JOURNAL
(2023)
Article
Acoustics
Leo McCormack, Archontis Politis, Raimundo Gonzalez, Tapio Lokki, Ville Pulkki
Summary: In this article, a parametric signal-dependent method is proposed to encode microphone array signals into Ambisonic signals. The method aims to achieve Ambisonic signals over a wider frequency band-width and at a higher spatial resolution compared to conventional signal-independent encoding. It is shown through objective and perceptual evaluations that the proposed parametric method outperforms conventional signal-independent encoding in most cases.
IEEE-ACM TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING
(2022)
Article
Energy & Fuels
Muhammad Usman Liaquat, Hafiz Suliman Munawar, Amna Rahman, Zakria Qadir, Abbas Z. Kouzani, M. A. Parvez Mahmud
Summary: Sound localization is a field in signal processing that involves identifying the origin of a sound signal, which has applications in speech enhancement, communication, radars, and medicine. A novel sound localization method has been developed that uses fewer microphones to reduce algorithm complexity, yet provides results comparable to more complex methods.
Article
Acoustics
M. Volpe, S. Bellizzi, R. Cote
Summary: This work analytically characterizes the acoustic properties of a one-port nonlinear acoustic sample loaded on a waveguide by extending the classical reflection coefficient as a scattering matrix. The proposed method combines the harmonic balance method and the polyharmonic distortion approach, showing promising results in theoretical and numerical aspects on two acoustic nonlinear absorbers.
JOURNAL OF SOUND AND VIBRATION
(2021)
