Results 21 to 30 of about 129,142 (267)
Weak Underwater Acoustic Target Detection and Enhancement with BM-SEED Algorithm
Journal of Marine Science and Engineering, 2023 Bearing time record (BTR) is widely used in the field of passive sonar information processing for target detecting and tracking. One of its challenges is to obtain high-resolution beamforming power spectral to facilitate the directions estimating of ...
Fan Yin +6 more
doaj +1 more source
Acoustic radiation force on small spheres due to transient acoustic fields [PDF]
Phys. Rev. Applied 15, 044034 (2021), 2020 Acoustic radiation force is a net force experienced by an object under the action of an acoustic wave. Most theoretical models require the acoustic wave to be periodic, if not purely monofrequency, and are therefore irrelevant for the study of acoustic radiation force due to acoustic pulses.
arxiv +1 more source
A low-frequency multiple-band sound insulator without blocking ventilation along a pipe
Scientific Reports, 2022 It is challenging to insulate sound transmission in low frequency-bands without blocking the air flow in a pipe. In this work, a small and light membrane-based cubic sound insulator is created to block acoustic waves in multiple low frequency-bands from ...
Zi-jian Zhou +7 more
doaj +1 more source
Acoustics-Actuated Microrobots
Micromachines, 2022 Microrobots can operate in tiny areas that traditional bulk robots cannot reach. The combination of acoustic actuation with microrobots extensively expands the application areas of microrobots due to their desirable miniaturization, flexibility, and ...
Yaxuan Xiao +4 more
semanticscholar +1 more source
Multifunctional acoustic holography based on compact acoustic geometric-phase meta-array [PDF]
, 2022 Optical geometric-phase metasurface provides a robust and efficient means for light control by simply manipulating the spatial orientations of the in-plane anisotropic meta-atoms, where polarization conversion plays a vital role. However, the concept of acoustic geometric-phase modulation for acoustic field control remains unexplored because airborne ...
arxiv +1 more source
Scientific Reports, 2023 The knowledge of acoustic wave propagation in a borehole embedded in gas hydrate-bearing sediments is of great significance for the exploitation of gas hydrate.
Lin Liu +4 more
doaj +1 more source
Trends in Hearing, 2022 For the realization of auditory augmented reality (AAR), it is important that the room acoustical properties of the virtual elements are perceived in agreement with the acoustics of the actual environment.
Annika Neidhardt +2 more
semanticscholar +1 more source
Ship Shaft Frequency Extraction Based on Improved Stacked Sparse Denoising Auto-Encoder Network
Applied Sciences, 2022 The modulation spectrum of ship radiated noise contains information on shaft frequency, which is an important feature used to identify ships and a key parameter involved in calculating the number of propeller blades.
Junshuai Ni +4 more
doaj +1 more source
The Journal of the Acoustical Society of America, 2017 Editor's Note: Readers of this journal are encouraged to submit news items on awards, appointments, and other activities about themselves or their colleagues. Deadline dates for news and notices are 2 months prior to publication.
openaire +9 more sources
Superhuman spatial hearing technology for ultrasonic frequencies
Scientific Reports, 2021 Ultrasonic sources are inaudible to humans, and while digital signal processing techniques are available to bring ultrasonic signals into the audible range, there are currently no systems which also simultaneously permit the listener to localise the ...
Ville Pulkki +2 more
doaj +1 more source