Results 51 to 60 of about 299,182 (254)

Historical Acoustics: Relationships between People and Sound over Time

open access: yesAcoustics, 2020
The Special Issue “Historical Acoustics: Relationships between People and Sound over Time” was the inaugural collection of the recently established journal “Acoustics (MDPI)”, so it felt appropriate to give it a focus to history ...
Francesco Aletta, Jian Kang
doaj   +1 more source

Colours of velvet noise

open access: yesElectronics Letters, 2022
Velvet noise is a sparse ternary pseudo‐random signal containing only a small portion of non‐zero values. In this work, the derivation of the spectral properties of velvet noise is presented.
Nils Meyer‐Kahlen   +2 more
doaj   +1 more source

Application of the LMS algorithm to identify the surface velocity responsible for the radiated sound pressure

open access: yesActa Acustica, 2021
A time domain approach based on the least mean square (LMS) algorithm is applied to reconstruct the source amplitude and source distribution on a plate. For this a numerical experiment is established.
Kropp Wolfgang   +3 more
doaj   +1 more source

Acousto-elastic interaction in combustion chambers [PDF]

open access: yes, 2006
This thesis deals with the interaction between combustion, acoustics and vibrations with emphasis on frequencies below 500 Hz. Extensive literature is available on the interaction between combustion and acoustics and much work is also available on the ...
Huls, Rob Alexander
core   +1 more source

Broadband Acoustic Collimation and Focusing using Reduced Aberration Acoustic Luneburg Lens [PDF]

open access: yes, 2020
Acoustic Luneburg lens is a symmetric gradient-index lens with a refractive index decreasing radially from the centre to the outer surface. It can be used to manipulate acoustic wave propagation with collimation and focusing capabilities. However, previously studied acoustic Luneburg lens works only at audible frequency ranges from 1 kHz to 7 kHz, or ...
arxiv   +1 more source

Research on the Robustness of Active Headrest with Virtual Microphones to Human Head Rotation

open access: yesApplied Sciences, 2022
The movement and rotation of the human head can significantly degrade the control performance of active headrests with virtual microphones. This paper investigates the performance robustness of an active headrest with virtual microphones against the head
Hongyu Chen   +3 more
doaj   +1 more source

Sonar acoustics [PDF]

open access: yes, 1997
The problem of producing a model to determine the beam pattern produced by a sonar set in the form of a circular cylinder with hemispherical end caps is studied.
Harriman, K.
core  

Some information on acoustic topological insulator [PDF]

open access: yesarXiv, 2023
In this exceedingly short review article, we have provided some information on acoustic topological insulator for pedagogical purpose. Since, intrinsically acoustic systems do not have Kramers doublets due to spin-zero status, artificially acoustic spin-half states could be engineered as reported in refs. 5-26 maintaining time reversal symmetry.
arxiv  

Investigating the Potential Use of EEG for the Objective Measurement of Auditory Presence

open access: yesApplied Sciences, 2022
Presence is the sense of being in a virtual environment when physically situated in another place. It is one of the key components of the overall virtual reality (VR) experience, as well as other immersive audio applications.
Shufeng Zhang, Xuelei Feng, Yong Shen
doaj   +1 more source

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