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A combined noise source model based on vertical coherence to quantify the proportions of two types of noise power.
J Acoust Soc Am
January 2025
National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China.
With the vigorous development of maritime trade, the frequency band from 100 to 1500 Hz of shallow-sea ambient noise is not only affected by surface wind-induced noise but also the contribution of ship noise. Shallow-sea ambient noise can be described by a linear combination of surface wind-induced noise sources and ship noise sources. By using the correspondence between the real part of the vertical coherence and vertical energy flux, this work establishes a combined noise source model based on vertical coherence.
View Article and Find Full Text PDFHigh-intensity focused ultrasound: an innovative approach for micro-manipulation of demineralized dentine.
J Transl Med
January 2025
Dental School, The University of Western Australia, 17 Monash Avenue, Nedlands, WA, 6009, Australia.
Background: Treatment of deep carious lesions poses significant challenges in dentistry, as complete lesion removal risks compromising pulp vitality, while selective removal often reduces the longevity of restorations. Herein, we propose a minimally invasive approach using High-Intensity Focused Ultrasound (HIFU) for microscale removal of carious dentine. Concurrently, HIFU's antimicrobial effects against associated cariogenic biofilms and the corresponding thermal and biological impacts on surrounding tissues were investigated.
View Article and Find Full Text PDFHigh resolution Brillouin spectroscopy of the surface acoustic waves in SbTe van der Waals single crystals.
Sci Rep
January 2025
ISQI, Faculty of Physics, Adam Mickiewicz University in Poznań, Poznań, Poland.
High-resolution Brillouin spectroscopy was employed to investigate the anisotropy in surface wave velocities within a bulk single crystal of SbTe, a well-known layered van der Waals material. By leveraging the bulk elastic constants derived from various simulation methods, we were able to theoretically calculate the distribution of surface acoustic phonon velocities on the cleavage plane of the material. Upon analyzing multiple simulation results, it became evident that the most significant discrepancies arose in the calculations of the elastic constant c, with values ranging from 48 to 98 GPa.
View Article and Find Full Text PDFNonlinear dynamic wave properties of travelling wave solutions in in (3+1)-dimensional mKdV-ZK model.
PLoS One
January 2025
Department of Mathematics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.
The (3+1)-dimensional mKdV-ZK model is an important framework for studying the dynamic behavior of waves in mathematical physics. The goal of this study is to look into more generic travelling wave solutions (TWSs) for the generalized ion-acoustic scenario in three dimensions. These solutions exhibit a combination of rational, trigonometric, hyperbolic, and exponential solutions that are concurrently generated by the new auxiliary equation and the unified techniques.
View Article and Find Full Text PDFTypicality analysis on statistical shape model-based average head and its head-related transfer functions.
J Acoust Soc Am
January 2025
School of Physics and Optoelectronics, South China University of Technology, Guangzhou, China.
In acoustics, an artificial head generally comprises two pinnae and occasionally a torso, which are useful for recording binaural signals and acquiring head-related transfer functions (HRTFs). Currently, most artificial heads are designed based on the anthropometric parameters of specific populations. However, anthropometric parameters do not accurately express head surface shapes, and thus, typical HRTFs are difficult to generate.
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