title: The long-term period measurement, an instrumental method in phoniatry.
abstract: With the help of an Analog to Digital Converter we are able to perform serial and statistical analysis in the time domain. The difficulty in those long-term period measurements consists in the correct extraction of the periodicity in human voice. A simple method is the electroglottography, which, however, is not applicable in all cases. The analysis of the acoustic wave (translated via microphone) demands a lot of electronics if to be precise. Our investigation consists of a compromise between precision and amount of instrumentation, and we only took one parameter as a criterion. The possible error is negligible. We present the results of this measurement type using the patterns of one normal voice and eight different kinds of voice disorders.
mesh_terms: D000293:Adolescent; D000328:Adult; D001044:Aphonia / Q000175:diagnosis; D001302:Audiometry, Speech / Q000295:instrumentation / Q000379:methods*; D003389:Cranial Nerve Diseases / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006685:Hoarseness / Q000175:diagnosis; D006801:Humans; D007818:Laryngeal Diseases / Q000175:diagnosis*; D007822:Laryngeal Neoplasms / Q000175:diagnosis; D007823:Laryngeal Nerves; D008297:Male; D008875:Middle Aged; D010212:Papilloma / Q000175:diagnosis; D010243:Paralysis / Q000175:diagnosis; D013997:Time Factors; D014831:Voice; D014832:Voice Disorders / Q000175:diagnosis*; D014833:Voice Quality