Aleksander Sek

TL;DR: The worsening of performance at high frequencies is greater when subjects are required to indicate the direction of a frequency change than when they just have to detect any change.

TL;DR: These experiments tested the hypothesis that detection of frequency modulation (FM) at very low rates depends mainly on temporal information (phase locking to the carrier) for carriers below about 5 kHz, whereas FM detection at higher rates (10 Hz and above) depends mainlyon changes in the excitation pattern (a "place" mechanism).

TL;DR: A fast method, using a band of noise that sweeps in centre frequency and a Békésy method to adjust the masker level required for threshold, gave PTCs with shifted tips, for both normally hearing and hearing-impaired subjects.

TL;DR: The test provides a simple, quick, and robust way to measure sensitivity to TFS, and shows that, for normal-hearing subjects, learning effects are small, and the effect of the level of testing is also small.

TL;DR: Psychometric functions measured for the detection of FM and AM using quasitrapezoidal modulation with a rate of five periods per second produced improvements in performance relative to that obtained with 5-Hz sinusoidal modulation and, for the two lower carrier frequencies only, the improvements were markedly greater for FM than for AM detection.