Results 21 to 30 of about 89,033 (263)
Journal of Sustainable Construction Materials and Technologies, 2023 This study uses a tested laterite soil composition to investigate the acoustic properties of interlocking compressive stabilized earth blocks (ICSEBs) produced by the Nigerian Building and Road Research Institute (NBRRI).
Timothy Danjuma +2 more
doaj +1 more source
Acoustic properties of dialysed kidney by scanning acoustic microscopy [PDF]
Nephrology Dialysis Transplantation, 1997 A correlation between acquired renal cysts in the dialysed kidney and renal cancer has long been debated, but no changes in the physical properties of kidneys at the microscopic level have been reported. The purpose of the present study was to classify the physical properties of the kidneys of patients undergoing haemodialysis at several stages of ...
H, Sasaki +6 more
openaire +2 more sources
On the Spectral Properties and Stabilization of Acoustic Flow [PDF]
SIAM Journal on Applied Mathematics, 1998 Perturbation theory is used to study certain properties of solutions of a system of differential equations governing two-dimensional acoustic flow. The study of spectral properties as well as energy decay is adressed in detail. Therefore the locations of eigenvalues of the infinitesimal generator of the semigroup associated with the system are ...
Bo Liu, Walter Littman
openaire +1 more source
Application of adaptive filter in fruit quality inspection based on its acoustic properties
浙江大学学报. 农业与生命科学版, 2003 The fruit quality inspecting system consisted of a electromagnet, a striking ball wrapped in rubber, a sensor with 2 microphones at a distance of 0.06 m, a set of signal processing circuit, and a computer with a data acquisition board.
RAO Xiu-qin, YING Yi-bin
doaj +1 more source
Acoustic Properties of a Metamaterial Acoustic Barrier
, 2020 In the last years, a lot of papers have reported the results of researchers on metamaterials. The study of metamaterials represents a new research field in noise control. Metamaterials are artificial structures with periodical elements, made by the arrangement of scatterers in a square or triangular lattice configuration.
Iannace, Gino +3 more
openaire +1 more source
Characterization of sounds produced by three Brazilian Alpheus snapping shrimp species (Decapoda: Caridea) in laboratory [PDF]
Brazilian Journal of BiologySnapping shrimps produce snap sounds used for predation, defense, and reproduction. Despite their ecological importance, only a few studies have described the acoustic properties of these sounds.
T. F. Xavier +6 more
doaj +1 more source
Applied Sciences, 2020 Love wave sensors have attracted significant interest due to their high sensitivity and low attenuation. Love mode acoustic dispersion relation, highest normalized mass sensitivity, optimum normalized waveguide layer thickness, and temperature ...
Naixing Huang +7 more
doaj +1 more source
A Muffler with Adaptive Acoustic Properties
Strojniški vestnik - Journal of Mechanical Engineering, 2015 An adaptive muffler upgrades the conventional muffler with a variable geometry to extend its working range. Adaptive muffler systems, described in the available literature, operate on the principle of controlling only a single property of the muffler to tune its working range.
Čudina, Mirko +3 more
openaire +2 more sources
Development of Acoustic Insulating Carpets from Milkweed Fibers Using Air-Laid Spike Process
FibersFibers from milkweed, which grows in Quebec (Canada), offer a distinct and outstanding advantage compared to other natural fibers: their ultra-lightweight hollow structure provides excellent acoustic and thermal insulation properties for the automobile ...
Deborah Lupescu +2 more
doaj +1 more source
Acoustic properties of /h/ [PDF]
The Journal of the Acoustical Society of America, 1989 The aim of this paper is twofold: (1) to investigate the physical mechanisms of sound generation for the consonant /h/ and (2) to examine the timing of supraglottal and glottal movements of /h/. Utterances in which /h/ was present or absent (e.g., “new heart” versus “new art”) were analyzed acoustically and contrasted.
Sharon Y. Manuel, Kenneth N. Stevens
openaire +1 more source