The following sound files were posted and discussed in Walk In The Woods but in order to keep things simple I decided to repost them here without the extra text and sound files.
The evening of the 4th of May, 2009 we heard and recorded a very strange hissing type of sound coming from the ridge just above our location. Difficult to describe, it’s position changed several times. The location was in my “Main Research Box” in Central Illinois.
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Click here to listen to sound clip:Â Hissing 1
About 30 seconds later it moved further up the ridge.
Waveform View
Spectral View
This picture is from Adobe Audition showing the length of time that the sound lasted, about 10 seconds which is quite a while for an animal to be exhaling.
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Click here to listen to sound clip:Â Hissing 2
We walked an hour back to the Jeep. We returned along the road to this last position and did a series of three soundblasts. It was 1 1/2 hrs. between the time that we heard the 2nd Strange Sound, hiked back the mile through the woods and drove the 4 1/2 miles back to begin the soundblasting . After soundblasting we again heard and recorded this strange hissing sound. This time the sound maker had moved further south, across the road into some trees on the other side.
Waveform View
Spectral View
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Click here to listen to sound clip:Â Â Hissing 3
I returned two days later and did an all night recording session. I left my recording gear in the woods and retrieved it the next morning. Although the sound recording was from a much greater distance it still seems to resemble the hissing sound.
Waveform View
Spectral View
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Click here to listen to sound clip:Â Hissing 4
Waveform View
Spectral View
About 25 years ago while hitch hiking across Washington state and about 10 miles west of Wenatchee I heard the same hissing sound that's on the number four recording. It didn't last quite as long but on the recording where the sound pitch gets high I got goose bumps because that's exactly what I heard except the hissing was only 20 feet away from where I was standing. The creature stayed pace with me while I walked at a quick pace. I could hear chatter as it was also breaking branches of the apple trees in the grove. Yes I was very nervous but really didn't feel threatened just as long as I stayed on the road and kept walking. This might sound crazy but I also talked to it and I could hear it chatter back as if we were carrying on a conversation. This of course happened at night and the creature never showed itself as it stayed in the shadows.