Hey, to answer your question: none of your parent Pokemon probably didn't have the perfect Speed IV. Just because a Pokemon has an "Alert to Sounds" characteristic doesn't mean that it'll have a perfect Speed IV. It may also be 26, 21, 26, 11, 6 or even 1. I suggest you check your parent's IVs before you breed.
As a word of advice, ask in the Simple Questions thread next time. (it's stickied)
As a word of advice, ask in the Simple Questions thread next time. (it's stickied)