Non-negative matrix factorization based single-channel source-separation of passive underwater acoustic signals in deep sea [0.03%]
基于非负矩阵分解的深海被动水声单通道源分离技术
Jean Lecoulant,Abdel-Ouahab Boudraa,Samuel Pinson
Jean Lecoulant
We use non-negative matrix factorization for source separation on ultra-low frequency passive-acoustic data from a single-channel recording acquired in deep sea. Non-negative matrix factorization decomposes the spectrogram into a spectral-c...
Sina Rostami,Joel Mobley
Sina Rostami
This work reports on the design and characterization of a tunable lens with a planar aperture that employs liquid channels to perform phase-based beamforming. The desired phase patterns are produced using specific speed-of-sound profiles an...
Frequency band analysis and comparison of localisation techniques for drones using microphone array measurements [0.03%]
使用麦克风阵列测量的无人机定位技术的频带分析与比较
Anique Altena,Mirjam Snellen,Salil Luesutthiviboon et al.
Anique Altena et al.
This study covers three aspects of acoustic localisation of drones using a microphone array. First, it assesses a grid-free approach, using differential evolution, to estimate the three-dimensional position of a drone. It is found that this...
Sonar micro-Doppler effect induced by ship oscillatory motion in waves: Phenomenon, model, and experimentation [0.03%]
由波浪引起的舰船振荡运动产生的声呐微多普勒效应：现象、模型和实验研究
Minhao Wang,Cuie Zheng,Dajun Sun et al.
Minhao Wang et al.
Traditional research attributes the modulated sidebands of ship radiation line-spectrum signals to reflections off rough ocean surfaces, but the Doppler effect caused by vessel motion may also contribute. This study establishes a micro-Dopp...
Why does the Falcon-9 booster make a triple sonic boom during flyback? An initial analysis [0.03%]
为什么在一级火箭返航时会产生三次音爆？初步分析
Mark C Anderson,Kent L Gee
Mark C Anderson
When the SpaceX Falcon-9 rocket booster descends through the atmosphere after a launch, it produces a sonic boom with three shocks in the far field, rather than the usual two-shock N-wave. In this Letter, the additional shock's origin is ex...
Validating the Iowa Test of Consonant Perception in a large cohort of cochlear implant users [0.03%]
大组人工耳蜗使用者的艾奥瓦辅音感知测验的验证研究
Francis X Smith,Joel I Berger,Phillip E Gander et al.
Francis X Smith et al.
The Iowa Test of Consonant Perception (ITCP) was designed to test word-initial phoneme perception by uniformly sampling frequently used phonemes as well as balancing feature overlap of response competitors. However, the task has only been v...
Computational Bayesian inference for active sonar localization under uncertainty in sound speed profile [0.03%]
声速剖面存在不确定性条件下的计算式贝叶斯主动声呐定位方法研究
Abner C Barros,Paul J Gendron
Abner C Barros
A computational Bayesian approach is presented to address active sonar localization under the challenges of small receive aperture, uncertain sound speed profile (SSP), and limited coherence time. The approach draws inference on wavevectors...
Synthetic adaptive matched field processing for moving source range estimation in deep water [0.03%]
深海水听阵列中低频段运动声源距离估计的合成自适应匹配场方法研究
Zhaokai Zhai,Fenghua Li,Feilong Zhu et al.
Zhaokai Zhai et al.
Adaptive matched field processing (AMFP) has proven effective for source localization in deep-water environments. However, when the target is in motion, the need for numerous snapshot samples can lead to distortion in covariance estimation,...
Improving transfer function measurements for three-dimensionally printed waveguides using a sand layer [0.03%]
利用沙层改善三维打印波导的传输函数测量
Rémi Blandin,Patrick Häsner,Peter Birkholz
Rémi Blandin
The reciprocity principle is widely used for acoustic measurements, including three-dimensionally printed waveguide transfer functions. Previous studies revealed unexpected deviations in the 1-4 kHz range, likely due to secondary transmissi...
Automated acoustic voice screening techniques for comorbid depression and anxiety disorders [0.03%]
用于共病抑郁和焦虑障碍的自动声学语音筛查技术
Mary Pietrowicz,Kaci Cunningham,Dylan J Thompson et al.
Mary Pietrowicz et al.
Anxiety disorders (AD) and major depressive disorders (MDD) are growing in prevalence, yet many people suffering from these disorders remain undiagnosed due to known perceptual, attitudinal, and structural barriers. Methods, tools, and tech...