Neural activity patterns (NAPs) for harmonic complex sounds composed of the third to tenth harmonics of (a) an F0 of , and (b) an F0 of . Side panels show the spectral profiles (vertical) and temporal profiles (horizontal) of the NAP.
Stabilized auditory images (SAI) of four harmonic complexes. All stimuli have eight consecutive harmonics; they differ in their fundamentals and lowest components. (a) , harmonics 11–18; (b) , harmonics 3–10; (c) , harmonics 11–18; (d) , harmonics 3–10. Side panels show the spectral profiles (vertical) and temporal profiles (horizontal) of the auditory images.
Schematic of the procedure of the melody task, adapted from Patterson et al. (1983). One note changes by a single diatonic interval between the first and second presentations of the melody, and the listener has to identify the changed note, marked here by a grey square.
Performance on the melody task with the 75 and fundamentals. The abscissa shows the average lowest component and the ordinate shows the probability of the listener correctly identifying the note which changed. Performance is plotted for each NC condition as a function of average lowest component. The black and grey lines show the results for the 75 and F0’s, respectively. The solid and dashed lines show the results for the four- and eight-harmonic stimuli, respectively.
Performance on the melody task in the ancillary experiments with the fundamental (black lines) and the fundamental (grey lines). The abscissa shows the average lowest component and the ordinate shows the probability of the listener correctly identifying the note which changed. Performance is plotted separately for the two rove conditions. The dashed and solid lines show the results for LCR values of one and three, respectively.
(Color online) The dual profile for a stimulus with four resolved harmonics: , , and . The temporal profile is the blue (dark) line and the spectral profile is the red (light gray) line. The F0 is represented in the temporal profile by the locating of the largest peak. In the spectral profile the F0 is represented by the spacing of the peaks.
(Color online) Dual profiles produced with the GT-AFB for stimuli with F0’s of 75 and . Panels (a)–(h) Profiles for an F0 of . (i)–(p) Profiles for an F0 of . Each row shows dual profiles with a constant NC; the value is eight for the top row, four for the middle row, eight for the second from bottom row, and four for the bottom row. Each column shows dual profiles for stimuli with a constant ALC, with values of three for the leftmost column, seven and eleven for the middle columns, and fifteen for the rightmost column.
Comparison of the experimental results with pitch-strength estimates from the dual profile model, based on a gammatone auditory filterbank, for an F0 of (black lines) and (grey lines). Dashed lines are the average experimental data plotted using the right ordinate (probability of correct identification as a function of average lowest component). Solid lines are the model values plotted using the left ordinate (pitch strength as a function of the average lowest component).
Results of an ANOVA of performance data (Dependent variable: SCORE). There is one significant main effect and one significant interaction, both of which are shown in bold type; they are ALC, and .
Article metrics loading...
Full text loading...