Experimental study of underwater propeller low-frequency noise flied

2016 ◽  
Author(s):  
Song Li ◽  
Desen Yang ◽  
Haoyang Zhang
Keyword(s):  
Experimental Study ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise

Experimental Study on an Active Noise Control System for Turboprop Driven Aircraft

2013 ◽  
Vol 333-335 ◽  
pp. 2142-2145
Author(s):  
Qing Fu Kong ◽  
Yu Liang Dai ◽  
Shi Jian Zhu ◽  
Jia Ming Wu
Keyword(s):  
Experimental Study ◽  
Control System ◽  
Sound Source ◽  
Noise Control ◽  
Active Noise Control ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Experimental Platform ◽  
Active Noise

In order to find a solution to the control of low frequency noise in the cabin of turboprop driven aircraft, an experimental active noise control (ANC) system is introduced in the paper, which consists of vibroacoustic field analogue subsystem, acoustic field measurement subsystem and acoustic barrier exciter subsystem. Effects of both different spaces between the primary sound source and secondary sound source of the ANC system and different frequency noises on noise-reduction result are investigated based on the experimental platform. Results of the experiment show a significant potential of the ANC method for the control of low frequency noise in the cabin of turboprop driven aircraft.

Low Frequency Noise Behavior in a-Si:H Schottky Barrier Devices

1996 ◽  
Vol 420 ◽  
Author(s):  
K. Aflatooni ◽  
A. Nathan ◽  
R. Hornsey
Keyword(s):  
Experimental Study ◽  
Schottky Barrier ◽  
Schottky Diode ◽  
Reverse Bias ◽  
Schottky Diodes ◽  
Low Frequency ◽  
Reverse Current ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Material Instability

AbstractWe present a systematic experimental study of low frequency noise behavior in Mo/a-Si:H Schottky diodes under reverse bias operation. The noise in the Schottky diode was found to increase with increasing reverse current and with an approximate 1/f behavior at low bias voltages, yielding a Hooge parameter in the range (2 to 3) × 10−4. At high reverse voltages, due to electrical stressing and hence, bias-induced material instability, a significant deviation from the 1/f behavior was observed.

Experimental study of excess low-frequency noise in tin

1982 ◽  
Vol 25 (2) ◽  
pp. 1427-1430 ◽  
Author(s):  
D. M. Fleetwood ◽  
N. Giordano
Keyword(s):  
Experimental Study ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise

Estimating the Quality of Thermionic Cathodes for Microwave Vacuum Tubes Using the Low-Frequency Noise Parameters

Vestnik MEI ◽  
2018 ◽  
Vol 5 (5) ◽  
pp. 120-127
Author(s):  
Mikhail D. Vorobyev ◽  
◽  
Dmitriy N. Yudaev ◽  
Andrey Yu. Zorin ◽  
◽  
...  
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Noise Parameters ◽  
Thermionic Cathodes ◽  
Vacuum Tubes

Simulation of Low Frequency Noise in a CCTWT

1999 ◽  
Author(s):  
Charles K. Birdsall ◽  
J. P. Varboncoeur ◽  
P. J. Christensen
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise
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