Semestral Work Suppression of 50 Hz disturbance in ECG by notch-filter
Notch filter design • Transfer function:
• 50 Hz centered disturbance: c=0
19/01/2007
Yann KOWALCZUK
2
Notch filter design • Frequency and phase response
19/01/2007
Yann KOWALCZUK
3
Application on signals • ECG clean signal/ECG with 50 Hz noise
19/01/2007
Yann KOWALCZUK
4
Application on signals • ECG with 50 Hz/Result after filtering
19/01/2007
Yann KOWALCZUK
5
Application on signals • Waveforms with 50 Hz/Result after filtering
19/01/2007
Yann KOWALCZUK
6
Results • Initial SNR with 50 Hz: 0,6 dB • SNR over signal after filtering: dB • Linear phase response and 2nd order filter with really sharp attenuation • Useful for fixed frequency disturbance 19/01/2007
CIIR filter design • Frequency and phase response (r=0,5)
19/01/2007
Yann KOWALCZUK
9
CIIR filter design • Frequency and phase response (r=0,2)
19/01/2007
Yann KOWALCZUK
10
Application on signals • Same ECG+50 Hz/Filtered with CIIR
19/01/2007
Yann KOWALCZUK
11
Application on signals • Waveforms with 50 Hz/Result after filtering
19/01/2007
Yann KOWALCZUK
12
Results • SNR=1,54 dB • Non-linear phase: distorsion of signal • Distorsion on clean ECG: -4,75 dB • Influence of coefficient r 19/01/2007
Yann KOWALCZUK
13
Signal application • Adding 47,5 Hz disturbance to clean ECG
19/01/2007
Yann KOWALCZUK
14
Signal application • 47,5 Hz/Result with 2 different filters
19/01/2007
Yann KOWALCZUK
15
Results • Initial SNR of mixed signal= -0,22 dB • SNR notch filter= -0,22 dB => fixed frequency filtrering! • SNR CIIR filter= 1,21 dB • Distortion by CIIR filter(r=0.1): -4,75 dB • Fixed frequency attenuation 19/01/2007
Yann KOWALCZUK
16
Conclusion • Notch filter: very efficient on fixed signal disturbance • Order 2 with notch filters equivalent to very high order IIR filters • CIIR filter suitable when high and sharp attenuation needed but brings distortion 19/01/2007
Centre, National Centre for Scientific Research, France) and Michel Gollac at the ...... Some physical problems such as skin disorders show only a tenuous link to ...
managerâshareholder relationship, in particular, tends to encourage a ... This combination of constraints, which may be seen as a characteristic of new ...... observed only from the middle of working life onwards; moreover, among young ...
Researcher and MaxMSP developper for NUMEDIART program (http://www. ... Play (Sonoscopie #2) on the 11th of may at Phenix theatre of Valenciennes. (France) - text ... JAVA trainer for an educational institute (ISF - Damigny, France).
Ignorez-vous par où commencer et auriez-vous besoin d'une bonne session de brainstorming avec nous ? Alors, connectez-vous à nous. C'est avec plaisir que ...
supplying air via a manifold and demand valve (reducer) which .... It is also essential that the air intake of the compres- ..... However, manufacturers are de-.
sections will provide an overview of the characteristics of platform work, ..... workers, clients and revenue generated, resulting in a quasi-non-existence of administrative ..... a supplementary form of income, the share of female workers is much ..
portable htc one v,telephone mobile ebay,telephone portable lg kp501,telephone mobile virtuel gratuit,telephone mobile blackberry sfr,telephone mobile costa rica,telephone portable samsung ancien modele,free mobile resiliation par telephone,telephone
Nov 20, 2002 - Please observe waste disposal requirements! - Remove dipstick and ... If oil level is above -a - there is risk of damage to Three Way. Catalytic Converter. ... contributes to safe operation at high engine load, especially in .... m.y.
the top right of each page and indicate the subject of each chapter. 1 General information. 2 Specifications. 3 Periodic inspections and adjustments. 4 Engine.
health problem across the EU15 (at 28%; only back pain was more common). ... pdf) , UK National Work-Stress Network , the National Institute for .... high work pace, up to 1997-1999 (depending on the question and the length of time that ...... in the
International architectural company specialized in luxury projects. ... brand's stores. Details design of the ... Louis Vuitton Japanese stores design department, responsible for the LV flagship at Roppongi in Tokyo, ... sketches for strategic areas.
"LEE Soon-Shin", Korean TV drama for KBS, 2004. CG boats battle,. My Job: Vfx supervisor, lighting TD, precompositing. 1997: Mac Guff Ligne (Paris). "Ocean" ...
Jan 8, 2003 - winding starting only), is not permitted even in an emergency. ... this case, only open the radiator plug or expansion chamber with the utmost caution, ... If there is an electric fan, do not approach the engine whilst it is still hot a
Oct 22, 2007 - 3. Work Ability Index. 7 Items. ⢠Current work ability compared with the lifetime best. ⢠Work ability ... Sick leave during the past year (12 months).
Stress at Work. How to Reduce and Manage Job and Workplace Stress. In this difficult economy, you may find it harder than ever to cope with challenges on the ...
CSIS0403 Implementation, Testing and Maintenance of Software Systems 2006-2007. Does 1x1 work? ... of multiple variables. But consider: will our 1x1 test cases for Boundary 3 spot the ..... scope: class, cluster, component, subsystem, up to ...
Science and Technology, Networks, Signal Theory, French language, ... Study of C, C++, JAVA, PHP languages at university. ... I had the chance to go to the.
faire de l'argent rapidement forum,comment faire quand on a 2 carte grise a faire,que vous ayez,comment faire un avion en papier super rapide,comment faire ...
extreme pitesti,chaussure sport femme tunisie,fitness first de lifestyle club dortmund,prendre masse musculaire course a pied,chaussures de sport femme montreal,dw gym opening times glasgow fort,salle de sport a vendre tunis,sala de fitness cluj big,