Study of MOSFET Low Frequency Noise Source Fluctuation Using a New Fully Programmable Test Set-up

2007 ◽  
Author(s):  
K. Rochereau ◽  
C. Blanc ◽  
M. Marin
Keyword(s):  
Noise Source ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Test Set ◽  
Set Up ◽  
Source Fluctuation

scholarly journals Factors influencing low-frequency noise reduction in typical Chinese dwelling layouts

2020 ◽  
pp. 146134842094297
Author(s):  
Yang Song ◽  
Jian Kang
Keyword(s):  
Noise Reduction ◽  
Noise Exposure ◽  
Noise Source ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Low Frequencies ◽  
Factors Influencing ◽  
Polyline Distance

Existing approaches to reducing the low-frequency noise exposure of dwellings are not always sufficient. This study investigated the significance of dwelling layout design for low-frequency noise control. The sound distribution in six typical Chinese dwelling layouts was analysed using in-situ measurements under steady-state noise of various low frequencies. The results showed that among two-bedroom dwelling layouts, the overall average noise reduction varied considerably (6 dB). The noise reduction for room levels (number of rooms sound crosses) 1–2 and 2–3 varies by 5 and 3 dB, respectively, and the noise reduction at door openings varies by 5 dB. A model to approximate the low-frequency noise reduction of a layout was developed using the polyline distance from the noise source and the number of walls the polyline has to cross, which were clearly shown to influence low-frequency noise reduction and seem to be the strongest investigated factors.

Low Frequency Noise Emitted from a Shake-Out Machine

1982 ◽  
Vol 1 (2) ◽  
pp. 73-78
Author(s):  
T. Nakashio ◽  
K. Higaki ◽  
I. Oshita
Keyword(s):  
Noise Reduction ◽  
Rotational Speed ◽  
Noise Source ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise

The propagation of low frequency noise from a shake-out machine has been investigated. It was shown that the primary noise source was in the rotation of the imbalanced mass and noise reduction was achieved by reducing the rotational speed.

scholarly journals Threshold of Rattling of Windows and Doors by Low Frequency Noise

2000 ◽  
Vol 19 (3) ◽  
pp. 141-149 ◽  
Author(s):  
Toshiya Kitamura ◽  
Jun-Ichi Takano ◽  
Yosuke Imura ◽  
Shinji Yamada
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Noise Generation ◽  
Low Frequency Noise ◽  
Auditory Thresholds ◽  
Visual Threshold ◽  
Resonance Frequencies ◽  
Glass Panels ◽  
Set Up ◽  
The Relationship

We set up a low frequency noise generation room to study the relationship between rattling phenomena and low frequency noise. Auditory thresholds and visual thresholds of rattling phenomena were measured for six kinds of Japanese and European doors. This paper describes the thresholds of rattling phenomenon for these doors, especially the Shoji (a thin paper pasted sliding door) and the Garasudo (a sliding door with glass panels). This study shows a relationship between the rattling thresholds and the resonance frequencies, changes of these thresholds according to the seasons and differences between auditory threshold curves and visual threshold curves.

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