INFLUENCE OF TRANSMISSION CHANNEL CHARACTERISTICS ON PERCEIVED VOWEL QUALITY
AJ WATKINS, H PATTISON, CJ DARWIN · 2024
Three experiments address the question of how the perception of P1 is influenced bypassing isolated steady-state vowels (Expt 1) or /jVJ/ syllables (kpt 2) through filters which change the relative amplitudes of harmonics in the 11 region.The results of the experiment show reliable changes in the /I/-/E/ phoneme boundary that move in opposite directions depending on whether the relative amplitudes of the F1 harmonics are changed or whether the whole of the PI region is simply reduced in amplitude.The third experiment introduces the steady-state vowels with a natural carrier phrase that is either unfiltered or has been filtered in the same way as the vowels.This experiment failed to show any phoneme boundary shift or any difference between the different filterings of the carrier phrase.