Noise source models for fricative consonants

2000 ◽  
Vol 8 (3) ◽  
pp. 328-344 ◽  
Author(s):  
S. Narayanan ◽  
A. Alwan
Keyword(s):  
Noise Source ◽  
Source Models

Prediction of the Aerodynamic Acoustic Power Contribution on Automobile’s Surface Based on Curle’s Integral in Broadband Noise Source Models

2011 ◽  
Vol 317-319 ◽  
pp. 2284-2288
Author(s):  
Zhen Gyu Zheng ◽  
Ren Xian Li
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Noise Source ◽  
Power Level ◽  
Research Work ◽  
Acoustic Power ◽  
Broadband Noise ◽  
Vehicle Body ◽  
Aerodynamic Noise ◽  
Source Models

The Aerodynamic noise, which is generated by the moving vehicle at high speed, is a kind of broadband noise. This paper dwelled on the Ligthill’s Acoustic Analogy firstly, and applied the realizable k-ε turbulence model to simulate the external steady flow field of automobile, so as to get the distribution characters of statistical turbulence quantities based on the Reynolds-averaged Navier-Stokes (RANS) equation. Then the Curle’s Integral in Broadband Noise Source Models was utilized to predict the local aerodynamic acoustic power contribution on automobile’s surface, which is helpful to the farther research work in the vehicle body optimization design based on aerodynamic noise controlling. The results shows that: The aerodynamic acoustic power contribution regions on surface mainly distribute near the automobile’s head and tail; and the maximum SAPL (Surface Acoustic Power Level) value is up to 83.15 dB in the vicinity of the rear wheel hub when the vehicle speed is 120km/h; the higher the speed of automobile, the more scattered the distribution of main aerodynamic acoustic power on automobile’s surface.

On Predicting Aeroacoustic Performance of Ducts with Broadband Noise Source Models

2005 ◽  
Author(s):  
Ashok D. Khondge ◽  
Sandeep D. Sovani ◽  
Sung-Eun Kim ◽  
Steven C. Guzy ◽  
Ashraf A. Farag
Keyword(s):  
Noise Source ◽  
Broadband Noise ◽  
Source Models

SPATIAL DISTRIBUTION OF 1/f NOISE SOURCE

1988 ◽  
Vol 49 (C4) ◽  
pp. C4-157-C4-160 ◽  
Author(s):  
L.K.J. VANDAMME
Keyword(s):  
Spatial Distribution ◽  
Noise Source

The Role of Computer Modeling in Electrocardiography

1990 ◽  
Vol 29 (04) ◽  
pp. 282-288 ◽  
Author(s):  
A. van Oosterom
Keyword(s):  
Electrical Activity ◽  
Computer Modeling ◽  
Body Surface ◽  
Electrical Current ◽  
The Body ◽  
Volume Conductor ◽  
Current Generator ◽  
Cardiac Electrical Activity ◽  
Source Models

AbstractThis paper introduces some levels at which the computer has been incorporated in the research into the basis of electrocardiography. The emphasis lies on the modeling of the heart as an electrical current generator and of the properties of the body as a volume conductor, both playing a major role in the shaping of the electrocardiographic waveforms recorded at the body surface. It is claimed that the Forward-Problem of electrocardiography is no longer a problem. Several source models of cardiac electrical activity are considered, one of which can be directly interpreted in terms of the underlying electrophysiology (the depolarization sequence of the ventricles). The importance of using tailored rather than textbook geometry in inverse procedures is stressed.

Uncertainty of a Millimeter-Wave Variable Noise Source using a Variable Attenuator

2011 ◽  
Vol 131 (4) ◽  
pp. 302-303
Author(s):  
Hitoshi Iida ◽  
Takayuki Inaba ◽  
Yozo Shimada ◽  
Koji Komiyama
Keyword(s):  
Millimeter Wave ◽  
Noise Source ◽  
Wave Variable ◽  
Variable Attenuator

Physics-informed Broadband Noise Source Identification and Prediction of an Ideally Twisted Rotor

2021 ◽  
Author(s):  
Christopher Thurman ◽  
Nikolas S. Zawodny ◽  
Nicole A. Pettingill ◽  
Leonard V. Lopes ◽  
James D. Baeder
Keyword(s):  
Source Identification ◽  
Noise Source ◽  
Broadband Noise ◽  
Noise Source Identification
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