"Can't you hear the sound?"
Translation:¿No puedes escuchar el sonido?
One of the contributors appears to have done this on a number of sentences- put in only one possibility, leaving out multiple perfectly good options and then no effort to add them no matter how often reported. I try to gauge that when being told that an answer I am absolutely sure is good Spanish is wrong, so I do not unlearn correct forms. But I would imagine quite confusing to those who are less sure.
No puedes oir el sonido was accepted 1-16-19.
Having tried various verb alternatives and conjugations, I suspect the tu form of puedes is required instead of puede because of an informal use of the English contraction "can't" rather than the more formal "cannot." Picky point here, perhaps, but this seems to be one of those Duolingo quirks in the designed algorithm application.