Eldritch Horror Sounds

…There were no boats out on that side of the lake, no jet skiers, and the sound came from east/slightly south of us. The first time we heard/felt it, we moved as far towards the sound as we could- from over by the playground to out on the end of the pier/boat launch area, and we were able to record the second sound on a cell phone. The second sound left us with a deeply uneasy feeling that dissipated after we left and as we approached downtown to go home….