Stimulus dependencies of the gerbil brain‐stem auditory‐evoked response (BAER). II: Effects of broadband noise level and high‐pass masker cutoff frequency across click polarity

1989 ◽  
Vol 85 (6) ◽  
pp. 2526-2536 ◽  
Author(s):  
Robert Burkard ◽  
Herbert F. Voigt
Keyword(s):  
Brain Stem ◽  
Noise Level ◽  
Cutoff Frequency ◽  
Broadband Noise ◽  
Evoked Response ◽  
Auditory Evoked Response ◽  
Gerbil Brain ◽  
High Pass ◽  
Click Polarity

Influence of click polarity on the brain-stem auditory evoked response (BAER) revisited

1990 ◽  
Vol 77 (6) ◽  
pp. 445-457 ◽  
Author(s):  
Daniel M. Schwartz ◽  
Michele D. Morris ◽  
John D. Spydell ◽  
Charlotte Ten Brink ◽  
Michael A. Grim ◽  
...  
Keyword(s):  
Brain Stem ◽  
Evoked Response ◽  
Auditory Evoked Response ◽  
The Brain ◽  
Click Polarity

Analog and Digital Filtering of the Brain Stem Auditory Evoked Response

1989 ◽  
Vol 98 (7) ◽  
pp. 508-514 ◽  
Author(s):  
Kevin T. Kavanagh ◽  
Renaee Franks
Keyword(s):  
Phase Shift ◽  
Wave Amplitude ◽  
Cutoff Frequency ◽  
Evoked Response ◽  
Auditory Evoked Potential ◽  
Pass Filter ◽  
Auditory Evoked Response ◽  
High Pass Filter ◽  
High Pass ◽  
Zero Phase

This study compared the filtering effects on the auditory evoked potential of zero and standard phase shift digital filters (the former was a mathematical approximation of a standard Butterworth filter). Conventional filters were found to decrease the height of the evoked response in the majority of waveforms compared to zero phase shift filters. a 36-dB/octave zero phase shift high pass filter with a cutoff frequency of 100 Hz produced a 16% reduction in wave amplitude compared to the unfiltered control. a 36-dB/octave, 100-Hz standard phase shift high pass filter produced a 41% reduction, and a 12-dB/octave, 150-Hz standard phase shift high pass filter produced a 38% reduction in wave amplitude compared to the unfiltered control. a decrease in the mean along with an increase in the variability of wave IV/V latency was also noted with conventional compared to zero phase shift filters. The increase in the variability of the latency measurement was due to the difficulty in waveform identification caused by the phase shift distortion of the conventional filter along with the variable decrease in wave latency caused by phase shifting responses with different spectral content. Our results indicated that a zero phase shift high pass filter of 100 Hz was the most desirable filter studied for the mitigation of spontaneous brain activity and random muscle artifact.

Effect of Broadband Noise on the Human Brain Stem Auditory Evoked Response

1989 ◽  
Vol 10 (6) ◽  
pp. 346-353 ◽  
Author(s):  
Kurt E. Hecox ◽  
Jennifer Patterson ◽  
Marina Birman
Keyword(s):  
Human Brain ◽  
Brain Stem ◽  
Broadband Noise ◽  
Evoked Response ◽  
Auditory Evoked Response

Brain stem auditory evoked response—A study in parameters

1989 ◽  
Vol 41 (1) ◽  
pp. 6-8 ◽  
Author(s):  
Deepak Gupta ◽  
S. K. Vishwakarma
Keyword(s):  
Brain Stem ◽  
Evoked Response ◽  
Auditory Evoked Response
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