Live or Memorex?
March 18, 2009
I woke up in a grouchy mood, still sulking about the credibility issues. I got out well before sunrise, didn't wait for Scott to get out of his tent, and drove right past Melinda's encampment to the end of the road. I grabbed my boat along with the rest of my gear and started the long portage across the sill, down the ATV trail, to the put-in on Willow Flat. All the way I was pondering whether my services were still actually needed on this project. I didn't feel like more uncorroborated detections from me alone would accomplish anything at this point; encounters by others would be much more valuable. I might have come to the end of my usefulness unless I got something on tape or anyone else got something at all.
Once I got out on the water, my mood improved. It was an absolutely perfect morning, with clear skies, calm winds, sunrise glows in the east, and birds calling everywhere. I paddled a short ways north from the put in, and then floated stationary for a bit while I got the video camera out. I had never actually paddled on Willow Flat before, and I was quite impressed with it. It was beautiful, and seemed to provide the perfect vantage points for listening to the woods to the west. I decided to shoot a video panorama from my location, just because it was such a nice morning.
Towards the end of this panorama, I heard and recorded a gorgeous, perfect
series of double knocks coming from the woods to my west, at a distance I would have guessed at roughly a half a kilometer. They were, to my ears, absolutely identical to the series I had heard in February, three weeks earlier. They also seemed to be originating from the same patch of woods, just a few hundred meters farther north than the February series. As I described in the earlier post, I decided with some disappointment over the next two minutes that I had actually only heard Scott's 7:00 simulated double knock series, not the real thing. Damned simulators. Here's the entire video segment, edited only to add titles marking the time and pointing out the double knocks. The final (third) one is the easiest to hear. There's a fairly long stretch after the double knocks where you are just looking at a closeup of my trousers while I dig around for my GPS, in order to get an accurate time stamp on the video:
4 Comments:
I'm not quite clear, but I take it neither Scott nor anyone else heard the 7:00 DKs you heard; and if that's so is that because they were that much farther away from the potential source than you were, or they were upwind and you were downwind or something else??? (I assume after doing the simulations Scott would be closely listening for a response).
That's correct, neither heard anything. There was no discernible wind; as you can see in the video the water is nearly mirror flat, with just the ripples from my own boat. Next Tuesday's post will include a map and more discussion. Melinda's not hearing anything is especially interesting as she was closer to Scott than I was, and had been within earshot of him and his simulator for most of the previous day so she knew well what his simulated DKs sound like. It does suggest that I was closer to the sounds that I recorded than she was, as it seems unlikely she would have failed to notice them if they were as loud at her location as they were at mine. This would place them between me and the head of Rhodes Lake, in the woods, several hundred meters from me, somewhat farther from Melinda, and a kilometer or more from Scott.
Again, just to be clear: listening to the video it almost sounds like the "series" of DKs are emanating from different directions (may just be an artifact of the way the boat is turning), but you felt confident at the time that they were all coming from the same point-source (or just the same general direction?) -- or is there any degree of uncertainty about that (as you yourself say, the 3rd DK almost sounds different/closer than the first two)?
Well the video doesn't really give any direct indication of the direction of a sound. The first one I did not consciously register. The second one did, and was coming from the direction in which I immediately swung the camera to face. The third one came from that direction as well, but this time with the camera pointed right at it. Relative to the direction of the camera, the first and second ones came from behind, the third came from directly in front. This is a function of the direction of the camera not the direction of the sound.
So the camera picked up the first two in spite of being pointed away from them, another thing that seems unlikely if they were simulations 1800m away.
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