scholarly journals Principal Component Analysis of Evoked Cortical Potentials from Awake Cat—Narrow‐Band Noise Masking

1969 ◽  
Vol 46 (1A) ◽  
pp. 95-95
Author(s):  
Charles M. Suter ◽  
Edmund M. Glaser
Keyword(s):  
Principal Component Analysis ◽  
Narrow Band ◽  
Principal Component ◽  
Component Analysis ◽  
Noise Masking ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Evoked Cortical Potentials ◽  
Cortical Potentials

Comparative Bekesy Typing with Broad and Modulated Narrow-Band Noise

1969 ◽  
Vol 12 (4) ◽  
pp. 840-846
Author(s):  
Charles T. Grimes ◽  
Alan S. Feldman
Keyword(s):  
White Noise ◽  
Narrow Band ◽  
Band Width ◽  
Masking Effect ◽  
Type Ii ◽  
Noise Masking ◽  
Narrow Band Noise ◽  
Band Noise ◽  
Continuous Tone ◽  
Békésy Audiometry

This study explored the effectiveness of modulated narrow-band noise as a masking source for sweep-frequency Bekesy audiometry. Five sophisticated normal-hearing subjects traced Bekesy audiometry thresholds for pulsed and continuous tone with no masking and under three conditions of contralateral masking: (1) white noise, (2) modulated narrow-band noise with a constant band-width of ±150 Hz, and (3) modulated narrow-band noise with a band-width of ±300 Hz. Results indicated that the continuous tone tracing obtained under the second condition separated from the pulsed tracing supportive of a Type II tracing. With the third condition, pulsed-continuous differences were somewhat smaller. Under the first condition, the difference between pulsed and continuous tracings was not apparent. When two unsophisticated subjects were tested with the modified band-width noise, results indicated extreme variation between pulsed and continuous tracings. We concluded that the masking effect of a constant band-width modulated narrow-band noise is about the same as that of white noise for a pulsed tone tracing. However, the use of a modulated narrow-band noise masking source may cause false Type II Bekesy audiograms due to the greater masking effect on a continuous tone threshold.

Evoked response narrow-band noise masking patterns in the chinchilla

1990 ◽  
Vol 47 (1-2) ◽  
pp. 175-181 ◽  
Author(s):  
Zhang Weiping ◽  
Richard J Salvi ◽  
Nicholas Powers ◽  
Wu Jinghui
Keyword(s):  
Narrow Band ◽  
Evoked Response ◽  
Noise Masking ◽  
Narrow Band Noise ◽  
Band Noise

Narrow‐band noise masking in the parakeet

1977 ◽  
Vol 61 (S1) ◽  
pp. S29-S29 ◽  
Author(s):  
S. E. Fahrbach ◽  
J. C. Saunders ◽  
G. R. Bock
Keyword(s):  
Narrow Band ◽  
Noise Masking ◽  
Narrow Band Noise ◽  
Band Noise

Identification of movement-related cortical potentials with optimized spatial filtering and principal component analysis

2008 ◽  
Vol 3 (4) ◽  
pp. 300-304 ◽  
Author(s):  
Andreas Trøllund Boye ◽  
Ulrik Qvist Kristiansen ◽  
Martin Billinger ◽  
Omar Feix do Nascimento ◽  
Dario Farina
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Spatial Filtering ◽  
Component Analysis ◽  
Cortical Potentials

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

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