Project Coyote
Sounds by Mark Gahler & Frank Wiley
Forty minutes before sunset on January 26th, Bill Benish and Paul McCaslin heard a double knock that Benish recorded. They heard the sound in relatively close proximity to where they were staking out a cavity. The sonogram below shows that the spacing between the first and second knock was about 103 milliseconds. Benish used an Edirol R-09HR audio field recorder.
On March 2nd, Mark Gahler heard and recorded possible ivorybill vocalizations on public land near the private property on which most of our search effort occurs. Below are six samples of that recording, including a possible faint double-knock that was not heard live but later found on the recording. The sounds are arranged in the order that they occurred, all within a 33-minute period. A Sennheiser shotgun mic and Sony Minidisc recorder were used.
This clip has two pairs of sounds. The sonogram is of the later pair.
This clip has two interesting sounds. The second is faint, 1.3 seconds after the first.
This possible DK (84ms) is followed by very faint vocalizations.
Three series of kent-like sounds were recorded by an acoustic node on January 25th and 26th. Although this system was not designed to detect kents, it can also function as a simple, remote audio recorder. It was being used in this manner when the possible kents were recorded. These share a similar base frequency (~850 Hz) as a number of the sounds presented above. This clip is extremely faint, but the best of the three series, from late afternoon on January 25th:
All six of us had an extended auditory encounter midday on January 25th. Many possible kents, single knocks and double knocks were heard, with some being recorded. Mark Michaels recorded this double knock using an Edirol R-09HR field recorder.
Below is a clip of two of the twelve kent-like calls that were recorded during the encounter. The possible kents tended to occur as singles, and all had a base frequency in the range of 920-955 Hz.
Sonograms created using Raven Lite.
Please direct questions or comments concerning the sounds recorded by Mark Gahler or the acoustic node to mgahler@south-run.com.
Other questions/comments should go to projectcoyote2010@gmail.com.