These two goals and their associated acoustic cues are thus seemingly in conflict. However, it is possible to create a virtual sound source where each ear only receives one channel of the DTCS signal. S1' and S2' are two channels of DTCS originating from a single virtual sound location, but each is only presented to a single ear. Note however, that the spatialized DTCS technique described here is not strictly presenting two monaural channels, rather there are still a variety of rich interaural cues. The HRTF cues, including interaural intensity differences and monaural spectral cues, are all present.
Speech sounds in particular are very rich in familiar information.
The work presented in this paper has only scratched the surface of the spatialized DTCS technique. Further development of the underlying technique is needed as well as a formal evaluation to test the efficacy of this method of auditory display. The dichotic SOLA technique also needs to be explored in greater detail. With knowledge of, and access to, the internal details of the SOLA algorithm it should be possible to generate a dichotic SOLA signal by calculating only one set of cross correlations. This will be a computational improvement over using the algorithm on a separate sound segment for each ear, as well as making it possible to maximize the amount of information presented in the two signals.