Within above-such solutions, the available processing power and advanced combinations of data acquisition and DSP techniques theoretically allow for a substantive data epoch record → frequency domain process → play-back routine in a continuous, effective real-time manner (at-least within the acceptable time delay limits collectively indicated by others).
Thus, tablet-based devices potentially offer clear technological advantage when compared to the spectrally-limited DSP capabilities and approaches of many conventional BTE hearing aids that may for example simply isolate and statistically process filter-selected time-based envelopes, or rely on simple environmental classifiers for some DSP outcomes such as noise reduction.
As a means of highlighting the substantive DSP opportunities available, a frequency domain process of focus for the presented exemplar is that of spectral shifting (especially frequency lowering relevant for hearing- mpaired individuals with limited access to higher frequency sounds), for which several techniques exist within the literature