Results 31 to 40 of about 2,454,565 (202)

Multi-Modal Acoustic Flow Decomposition Examined in a Hard Walled Cylindrical Duct

open access: yesArchives of Acoustics, 2014
Flow fields could be of great interest in the study of sound propagation in aeroengines. For ducts with rigid boundaries, the fluid-resonant category may contribute significantly to unwanted noise.
Stefan WEYNA, Witold MICKIEWICZ
doaj   +1 more source

Design and construction of a scanning stand for the PU mini-acoustic sensor

open access: yesOpen Engineering, 2021
The main objective of this work was to design and construct a device that would facilitate and reduce the intensity of work in the process of scanning surfaces with a Microflown PU Mini acoustic probe.
Liptai Pavol   +3 more
doaj   +1 more source

Active Noise Control Experiments using Sound Energy Flu

open access: yesOpen Engineering, 2015
This paper reports on the latest results concerning the active noise control approach using net flow of acoustic energy. The test set-up consists of two loudspeakers simulating the engine noise and two smaller loudspeakers which belong to the active ...
Krause Uli
doaj   +1 more source

Associated Students of the University of Puget Sound (ASUPS) Senate Minutes 2020-2021 [PDF]

open access: yes, 2020
Meeting minutes of the Associated Students of the University of Puget Sound from 09/2020 - 05/2021.
Associated Students of the University of Puget Sound (ASUPS)
core  

Development of an Experimental Acoustic Noise Characterization Setup for Electric Motor Drive Applications

open access: yesEnergies
This paper presents the development of an experimental setup for acoustic noise characterization of electric motors. It describes the sound measurement microphones utilized in the setup and discusses the application of octave bands and A-weighting in ...
Moien Masoumi   +2 more
doaj   +1 more source

Increased hippocampal GABAergic inhibition after long-term high-intensity sound exposure.

open access: yesPLoS ONE, 2019
Exposure to loud sounds is related to harmful mental and systemic effects. The hippocampal function can be affected to either high-intensity sound exposure or long-term sound deprivation. We previously showed that hippocampal long-term potentiation (LTP)
Alexandra O S Cunha   +3 more
doaj   +1 more source

Visualization of acoustic intensity vector fields using scanning measurement techniques

open access: yes, 2013
Sound propagation paths are not always well understood mainly because of the complex nature of the source or the environment. A direct method to capture the sound energy flow throughout a room is to measure the three-dimensional sound intensity ...
Fernandez Comesana, Daniel   +3 more
core   +1 more source

Sound intensity as a function of sound insulation partition [PDF]

open access: yesLe Journal de Physique IV, 1994
In the modern engineering practice, the sound insulation of the partitions is the synthesis of the theory and of the experience acquired in the procedure of the field and of the laboratory measurement. The science and research public treat the sound insulation in the context of the emission and propagation of the acoustic energy in the media with the ...
Cvetkovic, S., Prascevic, R.
openaire   +2 more sources

Scan-based sound visualisation methods using sound pressure and particle velocity

open access: yes, 2014
Sound visualisation techniques have played a key role in the development of acoustics throughout history. Progress in measurement apparatus and the techniques used to display sound and vibration phenomena has provided excellent tools for understanding ...
Fernandez Comesana, Daniel
core   +1 more source

Exploring vocal pitch and volume across Prakriti types in young Indian adults: A preliminary pilot study using acoustic voice analysis and the CCRAS-PAS

open access: yesInternational Journal of Ayurveda Research
Background: Ayurveda describes three primary Prakriti (~normalcy/physical constitution) types Vata, Pitta, and Kapha, each associated with unique physiological traits, including voice characteristics. Classical texts describe Kaphaja voice as Guru swara (
Sagarika Purohit   +4 more
doaj   +1 more source

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