Title :
Choosing adequate average number in electrophysiological studies using correlation coefficient
Author :
Shaw, F.-Z. ; Chen, R.-F. ; Tsao, H.W. ; Yen, C.-T.
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A theoretical relationship was derived among the number of trials averaged (N), initial signal-to-noise ratio (SNR) and correlation coefficient (r). The validity of this relationship was tested with a simulated signal with different amounts of noise. By selecting 0.95 as an acceptable r value, the adequate average number could be determined for different SNR conditions
Keywords :
bioelectric potentials; medical signal processing; ECG; brain evoked potentials; correlation coefficient; electrophysiological studies; ensemble average; initial signal-to-noise ratio; signal waveform extraction; simulated signal; Animals; Background noise; Brain modeling; Differential equations; Electrocardiography; Humans; Signal to noise ratio; Testing; White noise; Zoology;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.579395
