The first is the famous Ohio Howl. Matt Moneymaker got this recording in 1994 very near the WV border on the Ohio River.
Robert Benson (bioacoustician) at Texas A&M analyzed the Ohio recordings and determined that they were not mechanical/synthesized, they were definitely generated by a mammal, and they weren’t being made by any known animal on this or any other continent. This is the sound I mentioned in Chapter 16 of my book. https://www.youtube.com/watch?v=TPCcLddBekY
Another sound the NAWAC has heard is the Sierra Sounds. Go to Ron Moreheads' site to hear the sounds http://ronmorehead.com/
On page 143 and 153 of my book I mention the following vocalization. This is a call that was manifactured on the internet,,, yet we had responses when we broadcast this call! My theory is that Wood Apes mimic strange sounds in the night, as well as other animals.