48 25.46N 122 45.48W 1519 Moving sporadically toward Davidson Rock. Lots of breeching, and a few spy-hops. The pod was traveling in three groups, all within a mile of each other, alternating between 8-9kt travel and what looked like foraging behavior.
Considerable noise from the sea state, and occasionally I forget to turn off the depth-sounder…
Listen here (1.2MB) and here (0.6MB)
Lat: 48 37.69N; Lon: 123 13.26W 1248 Making about 7kts toward Kellet Bluff.
One of the frustrations of a sensitive hydrophone is that any abrasion of the cable against the hull of the boat results in quite a bit of noise. You can hear some of that in the last third of the recording, below. I’m crafting a fleece-padded outrigger in an attempt to mitigate this.
Listen here (1.1MB)
J’s and L’s between Williamson Rock and Lawson Reef, southbound around 1600, July 7. This is the most active part of the recording, with some strong echolocation clicks and whistles. The predominant noise (low-rev “clanking”) is from a tanker in the shipping lanes, about 3 miles away.
Listen here (1.4MB)
Posted in Research
Tagged echolocation, frequency response, recording, whale calls