Optimal sample frequency in computerized rhinomanometry. Development and method.
The authors studied the pressure/flow signals generated during active anterior rhinomanometry of 25 subjects, presenting a normal transnasal breathing. By means of a Fourier transformation, the frequency content of these signals was analyzed. This investigation demonstrated clearly that signals with a frequency of more than 50 Hz no longer yield any further information about the transnasal ventilation.
Versnick
F
F
Dept. of O.R.L., Academic Hospital V.U.B., Brussels, Belgium.
Clement
P
P
Nyssen
M
M
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods*; D008875:Middle Aged; D009666:Nose / Q000502:physiology*; D012129:Respiratory Function Tests; D012815:Signal Processing, Computer-Assisted