Frequency-difference sparse Bayesian learning for unambiguous direction-of-arrival estimation [0.03%]
无模糊来向估计的频差稀疏贝叶斯学习方法
Ze Yuan,Haiqiang Niu,Zhenglin Li et al.
Ze Yuan et al.
The frequency-difference (FD) method uses the FD Hadamard product, comprising auto-products to model below-band acoustic fields and unintended cross-products, for efficient direction-of-arrival (DOA) estimation under spatial aliasing. Despi...
An ultrasonic digital lock-in probing technique for monitoring fast changes within an elastic body [0.03%]
一种用于监测弹性体内快速变化的超声数字锁相探测技术
John Y Yoritomo
John Y Yoritomo
A probing technique using ultrasonic waves and a digital lock-in detection scheme is developed to monitor changes within an elastic body. The scheme integrates products of the signal and reference rather than low pass filtering them. Two ap...
Daiki Hashimoto,Akane Ida,Hinako Jozuka
Daiki Hashimoto
Word frequency plays an important role in a variety of phonetic phenomena. One of the well-known observations is that low-frequency words exhibit more phonetic imitation than high-frequency words. The previous studies made this observation ...
Nonlinear acoustic impedance of circular vent holes in miniaturized speakers [0.03%]
微型扬声器中圆形通气孔的非线性声阻抗
Mohammad Mohammadi
Mohammad Mohammadi
Back volume vent holes are designed to boost the low-frequency response of miniaturized electro-acoustic transducers in hearing aids and earphones. The acoustic impedance of these small vent holes considerably alters the frequency response ...
Seasonal dependence of very low frequency basin-scale telemetry observations [0.03%]
甚低频盆地尺度遥测观测的季节性依赖性
Kay L Gemba,Geoffrey F Edelmann
Kay L Gemba
Underwater position, navigation, and timing messages are transmitted to moored, single acoustic receivers over basin-scale distances. At a 75 Hz center frequency, the lengthy coherence time allows for successive and long-duration symbol tra...
Sound power level spectra of an installed General Electric F404 engine [0.03%]
安装在机翼下的通用电气F404发动机的声功率级谱分析
Hunter J Pratt,Logan T Mathews,Tyce W Olaveson et al.
Hunter J Pratt et al.
A sound power spectrum analysis has been conducted on a T-7A-installed F404 engine, for operating conditions spanning intermediate thrust to afterburner. From free-field pressure spectra at microphone arc arrays with radii of 38 and 76 m, s...
The stability of articulatory and acoustic oscillatory signals derived from speecha) [0.03%]
语音发声和声学振荡信号的稳定性研究
Jessica Campbell,Dani Byrd,Louis Goldstein
Jessica Campbell
Articulatory underpinnings of periodicities in the speech signal are unclear beyond a general alternation of vocal tract opening and closing. This study evaluates a modulatory articulatory signal that captures instantaneous change in vocal ...
Ye Yang,Dathan Nguyen,Katherine Chen et al.
Ye Yang et al.
Humans can modify their speech to improve intelligibility in noisy environments. With the advancement of speech synthesis technology, machines may also synthesize voices that remain highly intelligible in noise condition. This study evaluat...
Spatial observations of low-frequency acoustic propagation near isolated seamounts using an autonomous surface vehicle [0.03%]
基于自主水面航行器的孤立海山周边低频声场观测
Matthew McKinley,Davis Rider,Laurent Grare et al.
Matthew McKinley et al.
This work demonstrates the feasibility of using autonomous surface vehicles equipped with a shallow towed acoustic module (TAM) to survey the spatial variability of low-frequency acoustic propagation across complex bathymetry, such as the A...
Estimating sound pressure levels from distributed acoustic sensing data using 20 Hz fin whale calls [0.03%]
基于20 Hz长须鲸叫声的分布式声学感应数据声压级估计研究
Léa Bouffaut,Quentin Goestchel,Robin André Rørstadbotnen et al.
Léa Bouffaut et al.
Distributed acoustic sensing (DAS) is a promising technology for underwater acoustics, but its instrumental response is still being investigated to enable quantitative measurements. We use fin whale 20 Hz calls to estimate the conversion be...