Results 11 to 20 of about 4,178,499 (306)

Design and Implementation of a Composite Hydrophone of Sound Pressure and Sound Pressure Gradient [PDF]

open access: yesMicromachines, 2021
The bionic cilium MEMS vector hydrophone has the characteristics of low power consumption, small volume, and good low-frequency response. Nevertheless, there exists the problem of left–right ambiguity in the azimuth estimation of a single hydrophone.
Guojun Zhang   +6 more
doaj   +5 more sources

Data for sound pressure level prediction in lightweight constructions caused by structure-borne sound sources and their uncertainties [PDF]

open access: yesData in Brief, 2023
When predicting sound pressure levels induced by structure-borne sound sources and describing the sound propagation path through the building structure as exactly as possible, it is necessary to characterize the vibration behavior of the structure-borne ...
Albert Vogel   +3 more
doaj   +2 more sources

Characterization of sound pressure levels and sound sources in the intensive care unit: a 1 week observational study [PDF]

open access: yesFrontiers in Medicine, 2023
BackgroundExposure to elevated sound pressure levels within the intensive care unit is known to negatively affect patient and staff health. In the past, interventions to address this problem have been unsuccessful as there is no conclusive evidence on ...
Aileen C. Naef   +12 more
doaj   +2 more sources

Effects of Sound-Pressure Change on the 40 Hz Auditory Steady-State Response and Change-Related Cerebral Response [PDF]

open access: yesBrain Sciences, 2019
The auditory steady-state response (ASSR) elicited by a periodic sound stimulus is a neural oscillation recorded by magnetoencephalography (MEG), which is phase-locked to the repeated sound stimuli.
Eishi Motomura   +4 more
doaj   +2 more sources

Impact of gear rim narrowing angle on the temperature and sound pressure of Beveloid gear pair made of polymeric materials [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2021
The paper contains a description of the geometry of Beveloid gears. It describes the distribution of forces in a Beveloid gear with a straight tooth line and a helical tooth line. The paper presents research on the experimentally determined parameters of
Piotr Strojny
doaj   +1 more source

EVALUATION OF VIBRATION AND NOISE CHARACTERISTICS OF A COMPRESSION-IGNITION ENGINE FUELLED WITH NATURAL GAS- BIODIESEL DUAL FUEL [PDF]

open access: yesTransport Problems, 2023
As environmental requirements become more stringent and the planet becomes more polluted, the replacement of conventional diesel is attracting more interest.
Saulius STRAVINSKAS   +2 more
doaj   +1 more source

Numerical Study on Flow and Noise Characteristics of High-Temperature and High-Pressure Steam Ejector

open access: yesEnergies, 2023
Based on the shear stress transfer (SST) k-ω model, Ffowcs-Williams and Hawkings (FW–H) equation, and Lilley sound source equation, the flow and sound field of high-temperature and high-pressure steam ejectors are simulated.
Jiajie Zhang   +4 more
doaj   +1 more source

Numerical Simulation of Acoustic Wave Generated by DC Corona Discharge Based on the Shock Wave Theory

open access: yesApplied Sciences, 2023
The audible noise generated by corona discharge has the N-type characteristic at the initial generation stage, and it is a typical shock wave. This shock wave usually only exists around the corona source with a tiny range, making it difficult to obtain ...
Fan Yang   +3 more
doaj   +1 more source

Evaluation of the Oscillation Velocity in the Neck of the Helmholtz Resonator in Nonlinear Regimes

open access: yesAcoustics, 2022
Methods for measuring the acoustic characteristics of orifices have been reviewed. Comparison of three methods for evaluating of oscillation velocity in the neck of the Helmholtz resonator are presented.
Alexandr Komkin   +2 more
doaj   +1 more source

Acoustic analysis of selected sacred buildings in Szczecin

open access: yesBudownictwo i Architektura, 2021
The aim of this study was to assess acoustically selected sacred buildings located in Szczecin. The research part contains the research methodology and the results obtained. The research was carried out using two methods.
Agata Stolarska   +2 more
doaj   +1 more source

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