The hydrophone node at Lime Kiln State Park is located just southwest of the Lighthouse in about 7 meters of water. There is a long history of hydrophone deployments, repairs (after winter storm damage), and acoustic research at the Lighthouse. We thank Lime Kiln State Park for hosting the long-term research efforts of the Whale Museum and the Washington State Department of Wildlife for supplemental funding to repair storm damage in winter, 2007.
As of March, 2016, the stereo streaming system is maintained through a partnership between The Whale Museum and SMRU, led by Dr. Jason Wood. From 2007-2016, a dual-hydrophone system provided a live stream and archived time series of mean broadband and spectrum levels. The hydrophones were wired up by Val Veirs and attached to existing moorings during an initial SCUBA dive by David Howitt and Scott Veirs. Custom software written in Visual Basic by Val Veirs assesses average underwater sound levels and automatically detects "unusual" sounds. The stream was distributed by spacialnet.com for $23-30/month, paid for first through a NOAA grant to TWM and Beam Reach, and subsequently (2011-2016) by Beam Reach.
You can use the above "playlist" to access all archived files. Exceptional recordings are described below (and can be played using the adjacent icons).
|A 2-minute mono clip of J pod calls and clicks (w/some ship noise). From a longer vocal period (16:40~17:45).
|A 4.5-minute stereo clip of J pod calls and clicks, including an airplane and the sound of an orca surfacing. From a longer vocal period (19:45-20:23). [Warning -- this recording has low background noise and some sudden much louder sounds and concomitant distortion from the stream encoding].
|A 2-minute mono clip of J pod clicks and remarkably similar clicks from an approaching ship. The end of a longer vocal period (19:45-20:23). (The ship noise waned by ~20:35. Two faint calls were heard ~21:21. Another ship was approaching at 21:30.)
|A 4-minute 16-second mono clip of southern residents (J+K+L?) recorded by Lynn Waller. She noticed increased vocal activity about 2-min 45-sec into recording. Other listeners reported calls at Lime Kiln at 21:25, 22:50 and 23:10, and at OrcaSound around 23:15 (with a harbor seal), suggesting they were spread out along much of the west side.
|A 1-hour 4-minute 4-second mono clip of southern residents J pod members containing calls, echolocation clicks, pebble splash sounds, and boat noise. The J16s were sighted about two hours earlier ~1km south of the hydrophone. Listening log
|A 2-minute stereo clip of southern residents recorded by Andy Good of the UK. This recording contains a few very loud whistles, as well as S1 and S16 calls, that were made as the orcas traveled north past Lime Kiln.