scholarly journals Specifying Power Filter Insertion Loss Values in Terms of Electromagnetic Safety of IT Equipment

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 2041
Author(s):  
Leszek Nowosielski ◽  
Bartosz Dudziński ◽  
Rafał Przesmycki ◽  
Marek Bugaj
Keyword(s):  
Insertion Loss ◽  
Noise Level ◽  
Information Leakage ◽  
Environmental Noise ◽  
Analytical Relation ◽  
Power Filter ◽  
Conducted Emission ◽  
System Input ◽  
Filter Insertion

At present, one of the main methods of minimizing risk resulting from electromagnetic information leakage is to attenuate the undesired levels of radiated and conducted disturbances generated by IT equipment, as these disturbances can carry information processed by said equipment. Attenuation of conducted compromising emissions is most commonly handled with filters with a sufficiently high insertion loss. This article defines an original analytical relation specifying insertion loss value requirements for mains filters and estimates values of parameters included in the defined relation. Furthermore, this defined relation was used to define requirements for insertion loss provided by the mains filters, above which the ratio value of potentially compromising conducted emission levels to the environmental noise level at the infiltrating system input S/N < 0 dB. As a consequence, electromagnetic infiltration is significantly impeded.

Power Filter Insertion Loss Evaluated in Operational-Type Circuits

1968 ◽  
Vol EMC-10 (2) ◽  
pp. 243-255 ◽  
Author(s):  
Don Clark ◽  
Roger Benning ◽  
Paul Kersten ◽  
Donald Chaffee
Keyword(s):  
Insertion Loss ◽  
Power Filter ◽  
Filter Insertion

Influences of environmental noise level and respiration rate on the accuracy of acoustic respiration rate monitoring

2017 ◽  
Vol 32 (1) ◽  
pp. 127-132 ◽  
Author(s):  
Shizuha Yabuki ◽  
Hiroaki Toyama ◽  
Yusuke Takei ◽  
Toshihiro Wagatsuma ◽  
Hiroshi Yabuki ◽  
...  
Keyword(s):  
Respiration Rate ◽  
Noise Level ◽  
Environmental Noise

scholarly journals Traffic Noise Levels in the City of Banja Luka

2018 ◽  
Vol 16 (1-2) ◽  
Author(s):  
Predrag Ilić ◽  
Dragana Nešković Markić ◽  
Ljiljana Stojanović Bjelić
Keyword(s):  
Noise Level ◽  
Environmental Problem ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Environmental Noise ◽  
Noise Levels ◽  
Great Problem ◽  
Health Institutions ◽  
Banja Luka ◽  
The City

Noise pollution, as a major environmental problem, is present in Banja Luka. The measured values exceeded the level of noise allowed, which is a great problem. Evaluation of the noise levels was carried out in the streets in the area with health institutions. Objectives of this research were to evaluate the environmental noise pollution in the City of Banja Luka due to traffic noise and to compare the measured noise levels in the city with legislation and to establish the connection between noise and the number of vehicles. Correlation between the noise level and number of vehicles was positive and significant during the study period (r=0.89). It is confirmed that, with the increase of the number of vehicle, the noise level increases, i.e. the decrease in the number of vehicle decreases the noise level.

scholarly journals STUDY ON EFFECTIVE NOISE BARRIER AT SENIOR HIGH SCHOOL (SMAN 02) CIBINONG

2019 ◽  
Vol 2 (2) ◽  
pp. 181
Author(s):  
Aulia Ramandha ◽  
Wisnu Eka Yulyanto ◽  
Sandra Madonna
Keyword(s):  
High School ◽  
Insertion Loss ◽  
Noise Level ◽  
Road Traffic ◽  
Traffic Noise ◽  
Road Traffic Noise ◽  
Type Ii ◽  
Noise Barrier ◽  
Barrier Type ◽  
The Difference

<strong>Aim:</strong> The aim of this study is to design noise barrier shapes and to investigate its effectiveness in reducing traffic noise at one public school in Indonesia. <strong>Methodology and Results:</strong> Two types of barriers were designed on a laboratory scale using plywood materials and the noise level was measured using Noise Analyzer Briiel and Kjaer Type 2250. Noise reduction was analyzed by using the Insertion Loss method based on the difference of the noise level before and after implementing the barrier. The results show that the barrier Type II with a length of 200 cm, a receiver height of 30 cm, and a curved shape of 45° angle (Type L) is more effective in reducing the noise than the other variation of barrier shape and length. Barrier Type L (Type II) can reduce the noise at high frequency between 1–8 kHz with an Insertion Loss value of 6.9–27.9 dB. <strong>Conclusion, significance and impact study:</strong> The noise barrier Type II, with specifications of 20 m length, 3 m height, and barrier material of reinforced concrete, is recommended to be used at the high school to reduce the road traffic noise.

scholarly journals Evaluation of Environmental Noise Pollution (Traffic, Schools, Hospitals) and Noise Perception

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Betul Kasagıcı ◽  
Nuray Ates
Keyword(s):  
Environmental Pollution ◽  
Health Effects ◽  
Noise Level ◽  
Noise Pollution ◽  
Environmental Noise ◽  
Environmental Problems ◽  
Noise Levels

Nowadays, noise pollution, one of the crucial environmental problems as a result of increase in the population, has caused physical and psychological negativities in people's lives. The increase in the number of vehicles along with the population, the lack of infrastructure in the existing roads, misbehavior of the drivers due to the lack of education lead to an increase in noise pollution. The current study aimed to determine how much noise pollution that people are exposed to in traffic, schools and hospitals in Kayseri, one of the most important industrialized centers in Turkey with a population approximately 1.4 million. The levels of noise pollution averagely varied between 62-72 dBA in the streets and it is observed that the noise level changes depending on the vehicle intense in traffic. The noise levels in schools ranged from 41 to 57 dBA in the morning when window was closed that were higher than the regulation limit. The noise levels in hospitals were between 46 and 58 dBA when window is closed. The results of the survey conducted among a total of 153 people showed that noise was considered as environmental pollution by 98% in residential, 90% in schools and 73% in hospitals. The most noise-related health effects specified by the participants was the headache with 41% followed by frustrated and stressed with 24%

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