Here is a sound that sounds like either brainstorm or green needle, depending on which words you focus. Try own word combinations. I have no trouble hearing brain needle or green storm, for example.
That is incredible. Every time I try to hear it one way I do, and then I try and hear it the other way and I do, clear as day. I even started backing up the playback bar and repeating the exact same part of the audio and it's BOTH!
Hmm no matter how hard I try, I can't get storm. Closest I can get is brain needle. It's just too clear to me that there are three syllables, and I can't map storm to the second half.
I had trouble hearing it too, so I closed my eyes to remove the flashing light as input and, I shit you not, just straight up told myself "you will hear brain storm". It was interesting not only in that that worked, but that my perception of the word was so completely different that it sounded nothing like green needle.
https://www.youtube.com/watch?v=1okD66RmktA