I think that such questions are too localized. What is the benefit for future readers that find those questions?
The other issue I can find with that kind of questions is that Stack Exchange sites don't allow to attach files to questions, if they are not images. What would happen if the voice recording is hosted in a site that would have any problem, orand lose the file you stored there? Future readers would find a question they wouldare not be able to understand. Questions that are asked areshould not be just helpful for those who askasked them, but also for future readers; if a question is only helpful for the person who asksasked it, then the questionit is too localized.
Then, howHow do you decide which word to pronounce when you record your voice? If you record your voice when you say a simple word (e.g. for, example, why), those who areis a native English speakersspeaker may not find anything wrong with your pronunciation. Would you ask about a single word that you think you are not pronouncing correctly? How useful will the question beifbe if the answer is "You pronounce it correctly"?