Pierre, yes, those are good recent papers. But the basic idea of ITD
at high frequencies goes way back. As McFadden and Pasanen (1976) say,
based on bands of noise and two-tone signals, "In many conditions of
listening, sensitivity to interaural time differences at high
frequencies compares favorably with sensitivity at low frequencies--good
performance requires only tens of microseconds of interaural time
delay."
(McFadden, D. and Pasanen, E. G. (1976). "Lateralization at high frequencies based on interaural time differ-
ences", The Journal of the Acoustical Society of America 59, 634-639.)
Dick(McFadden, D. and Pasanen, E. G. (1976). "Lateralization at high frequencies based on interaural time differ-
ences", The Journal of the Acoustical Society of America 59, 634-639.)
ps. Their introduction lists older observations, and comments on how they tend to get ignored in the face of the duplex theory that works only with tones and narrowband signals; it is a good reminder for us now:
Recently Henning (1974a, 1974b) remade a point that
badly needed to be remade. He showed once again that
the auditory system can utilize interaural time differ-
ences to lateralize at high frequencies when the wave-
forms are complex. The same fact had previously
been demonstrated by David, Guttman, and van Bergeijk
(1959), Leakey, Sayers, and Cherry (1958), Klumpp
and Eady (1956), Tobias and Schubert (1959), and oth-
ers, but many of us concerned with binaural processing
had been ignoring these data and had come to think
solely in terms of the so-called duplex theory of sound
localization. This widely cited theory asserts that the
auditory system uses interaural time differences to
localize only for frequencies below about 1200-1500 Hz,
and that at higher frequencies it can only use the gradu-
ally increasing interaural level differences. But as
Henning (1974a, 1974b) showed, and as we shall further
demonstrate here, time-delayed complex waveforms at
high frequencies can be lateralized just as accurately
as time-deiayed low-frequency waveforms. The im-
plication is that with complex waveforms the auditory
system is able to process the ongoing interaural time
differences present in the fluctuating envelope. The
problem with the duplex theory, then, is that it was
based solely on localization and lateralization research
employing pure tones, and thus, is concerned only with
cycle-by-cycle differences in the fine structure of the
waveform. And while the theory is true enough for
such waveforms, it is almost totally irrelevant, for it
cannot be appropriately generalized to real-world situ-
atious involving complex waveforms.