Sociodialectology ; Elderspeak; Gerontolekt; Seniorensprache; Old age (language behavior) ; Phonetics (sociolinguistics) ; Sociophonetics ; Vowel change ; Mundartforschung; Dialectology ; Frequency (acoustics) ; Presbyphonia; Old age (phon.) ; Cepstrum; Spectrography ; Voice register ; Lautquantität; Lautqualität; Quantität (phonet.) ; Quantity (phonet.) ; Qualität (phonet.) ; Quality (phonet.) ; Vowel duration (phonet.) ; Diphthongization ; Monophthongization ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English
