Hi I have just listened to it and can't make out any difference with other recordings. It sounds normal to me. There could have been an audio glitch. It seems to match what we have for it elsewhere. We also have 4 soundfiles from two speakers attached to this sentence and they all sound identical to me (aside from the gender of the speakers).
I forced myself to hear "ooah" in the female voice recording, even though I'd originally beard "blaa".
I think it probably has something to do with people's perceptions, like the black and blue/white and gold dress, you just have to put your mind to it and force yourself to hear the right thing.
P.S.: I don't actually know if this works for other people, but it does for me.