Zobrazeno 1 - 10
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pro vyhledávání: '"JohnPaul Abbott"'
Autor:
JohnPaul Abbott
Publikováno v:
The Journal of the Acoustical Society of America. 150:A104-A104
Publikováno v:
The Journal of the Acoustical Society of America. 129:622-632
Measurements of the wind noise measured at the ground surface outdoors are analyzed using the mirror flow model of anisotropic turbulence by Kraichnan [J. Acoust. Soc. Am. 28(3), 378-390 (1956)]. Predictions of the resulting behavior of the turbulenc
Publikováno v:
The Journal of the Acoustical Society of America. 137(3)
A large porous wind fence enclosure has been built and tested to optimize wind noise reduction at infrasonic frequencies between 0.01 and 10 Hz to develop a technology that is simple and cost effective and improves upon the limitations of spatial fil
Autor:
Sandra L. Collier, Richard Raspet, John M. Noble, W. C. Kirkpatrick Alberts, Jeremy Webster, JohnPaul Abbott
Publikováno v:
Proceedings of Meetings on Acoustics.
Autor:
JohnPaul Abbott, Richard Raspet
Publikováno v:
The Journal of the Acoustical Society of America. 137:2260-2261
This investigation compares the measured wind noise of two types of infrasonic wind noise reduction barriers. The first type is a set of 2.0 m diameter semi-porous fabric domes constructed and tested by the Army Research Laboratory [J. Acoust. Soc. A
Autor:
JohnPaul Abbott, Richard Raspet
Publikováno v:
Proceedings of Meetings on Acoustics.
Publikováno v:
The Journal of the Acoustical Society of America. 140:3259-3259
As part of its Greenhouse Gas and Climate Science Measurements Program, the National Institute of Standards and Technology (NIST) has successfully developed long-wavelength acoustic flowmeters (LWAFs) to measure the average flow speed, V, and the spe
Publikováno v:
The Journal of the Acoustical Society of America. 140:3260-3260
A cut-off frequency criterion for contributions for the wind noise generated from the undisturbed and surface regions for a wind noise reduction device, such as wind fence enclosures and semi-porous fabric domes, is given. The calculations of the mea
Autor:
JohnPaul Abbott
Publikováno v:
The Journal of the Acoustical Society of America. 140:3194-3194
Wind noise is a form of pseudo-noise. It is generated and propagated by physical mechanisms that are different from acoustic noise; however, its effect on microphones and similar pressure sensitive devices is indistinguishable from acoustic noise. Wi
Publikováno v:
The Journal of the Acoustical Society of America. 139:2120-2120
NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we co