Results 1 to 10 of about 99,340 (315)

Sound transmission using a tuning fork for the diagnosis of developmental dysplasia of the hip in newborns [PDF]

Frontiers in Pediatrics
IntroductionThis study aims to estimate the validity and reliability of sound transmission tests using a tuning fork and stethoscope compared with the usual clinical procedures for the diagnosis of developmental dysplasia of the hip in newborns from the ...
Nicolás Padilla-Raygoza, Jéssica Plascencia-Roldán, Jéssica Plascencia-Roldán, Guadalupe Irazú Morales-Reyes, Guadalupe Irazú Morales-Reyes, Luis Guillermo Patiño-Gutiérrez, Ariana Valeria Girón-Soto, Evaristo Antonio Meza-Galván, Itzel Marcela Anguiano-Canchola, Sergio Emmanuel Luna Santillana, José Juan Torres-Hernández, Gilberto Flores-Vargas   +11 more
doaj   +2 more sources

Cause Analysis and Process Optimization of Non uniformity of FRP Anti current Vibration Carrier Shell [PDF]

MATEC Web of Conferences, 2023
For improving the test system, it needs to build measuring carrier and optimize shell design. To obtain valid and reliable test data, it needs the measurement uncertainty of test system with 3dB.But the test results show the measurement of results ...
Liu Yanqiong, Wu Ji, Hou Peng, Wang Wenguan, Men Lijie   +4 more
doaj   +1 more source

Sound Reduction of Ventilation Ducts through Walls: Experimental Results and Updated Models

Acoustics, 2021
Ventilation ducts can have a negative effect on the sound reduction index between two rooms if they pass through the dividing structure without treatments.
Erik Nilsson, Nikolaos-Georgios Vardaxis, Sylvain Ménard, Delphine Bard Hagberg   +3 more
doaj   +1 more source

Investigation on Low Frequency Bandgap of Coupled Double Beam with Quasi-Zero Stiffness for Power Transformer Vibration Control

Shock and Vibration, 2022
To suppress low frequency vibration and noise generated by power transformer in residential area and achieve environment protection standards, a double-beam metamaterial is proposed, which is fabricated through periodically coupling silicon steel sheet ...
Qiang He, Jingkai Nie, Yu Han, Yi Tian, Chao Fan, Guangxu Dong   +5 more
doaj   +1 more source

Analytic model research of sound propagation in pipe wall with sound absorption [PDF]

MATEC Web of Conferences, 2022
There are a lot of principles for sound transmission in the pipeline for whether sound transmission structure or noise reduction structure. Even in ultrasonic testing, there is a large number of principles for using pipeline sound transmission.
Ren Juan, Liu Qingjun, Chen Ting, Deng Pingye   +3 more
doaj   +1 more source

Analysis of a Geometrical-Stiffening Membrane Acoustic Metamaterial with Individually Tunable Multi-Frequencies

Archives of Acoustics, 2021
To realize a structure which can be conveniently tuned to multiple and wideband frequency ranges, a geometrical-stiffening membrane acoustic metamaterial (MAM) with individually tunable multiple frequencies is presented.
Junjuan ZHAO, Xianhui LI, David THOMPSON, Yueyue WANG, Wenjiang WANG, Liying ZHU, Yunan LIU   +6 more
doaj   +1 more source

Fast vibro-acoustic response computations for finite periodic metamaterial plates using a generalized Bloch Mode Synthesis based sub-structuring approach

Frontiers in Mechanical Engineering, 2022
Metamaterials have recently emerged and shown great potential for noise and vibration reduction in specific frequency ranges, called stop bands. To predict stop bands, their often periodic nature is exploited and dispersion curves are calculated based on
Lucas Van Belle, Lucas Van Belle, Claus Claeys, Claus Claeys, Wim Desmet, Wim Desmet, Elke Deckers, Elke Deckers   +7 more
doaj   +1 more source

Study on Sound Transmission across a Floating Floor in a Residential Building by Using SEA

Archives of Acoustics, 2021
For the purpose of reducing the impact noise transmission across floating floors in residential buildings, two main sound transmission paths in the floating floor structure are considered: the stud path and the cavity path. The sound transmission of each
Xianfeng HUANG, Yimin LU, Chen QU, Chenhui ZHU   +3 more
doaj   +1 more source

Analysis of the Acoustic Transcranial Bone Conduction

Audiology Research, 2022
Objectives: (1) To analyze the preferential pathways of sound transmission and sound waves travelling properties in the skull and (2) to identify the location(s) on the skull where bone conduction to the cochlea is optimal.
Catherine Dufour-Fournier, Arnaud Devèze, Jonathan Barbut, Erick Ogam, Issam Saliba, Catherine Masson   +5 more
doaj   +1 more source

Towards an alternative representation of indoor acoustic environment

Acta Acustica, 2022
The purpose of this investigation is to propose an alternative indoor sound spectrum based on objective and verifiable data, representative for an average household in Europe. It is obtained from the energetic sum of the emission spectra of sound sources
Bailhache Simon, Maillard Julien, Guigou-Carter Catherine   +2 more
doaj   +1 more source