Is it permissible to record academic curricula for the blind with a woman's voice?

The preponderant view is that a woman's voice is not in itself 'awrah (something that must be concealed). This is indicated by the absence of any prohibition against listening to their speech. The prohibition only pertains to softening the speech in a way that leads to temptation, and it is forbidden to derive pleasure from her voice. Therefore, there is no impediment to recording or listening to educational materials in a woman's voice for the blind, provided that her speech is not softened, and the male listener does not derive pleasure from her voice.