tag:blogger.com,1999:blog-4723513682494143228.post2196546993746801608..comments2024-03-08T06:37:19.932-05:00Comments on Listening in Nature: Searching for the Missing NotesLisa Rainsonghttp://www.blogger.com/profile/16728287766989599546noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-4723513682494143228.post-66047789061885264032015-03-29T20:40:46.234-04:002015-03-29T20:40:46.234-04:00I was thinking something along those lines, and I&...I was thinking something along those lines, and I'm so glad you confirmed this. Yes, please do send along the sound attenuation references when it's convenient.Lisa Rainsonghttps://www.blogger.com/profile/16728287766989599546noreply@blogger.comtag:blogger.com,1999:blog-4723513682494143228.post-19593184705987687232015-03-29T20:37:16.912-04:002015-03-29T20:37:16.912-04:00Wil, that's a really interesting idea and I ma...Wil, that's a really interesting idea and I may indeed be able to pursue that. Lisa Rainsonghttps://www.blogger.com/profile/16728287766989599546noreply@blogger.comtag:blogger.com,1999:blog-4723513682494143228.post-1290894899266813052015-03-29T17:45:12.082-04:002015-03-29T17:45:12.082-04:00Lisa -- Very interesting, and I love the spectrogr...Lisa -- Very interesting, and I love the spectrogram mash ups! I think the reason you can sometimes hear the higher notes probably has to do with the vegetation and greater attenuation of higher frequencies, especially in an environment with lots of stuff to create reflections and to absorb them. <br /><br />I've noted the loss of high notes for some birds in some environments a number of times. One example is the Black-throated Green Warbler "Trees, trees, murmuring trees" song, which can sound very different from a distance in the woods. If I remember correctly, the buzzy notes get lost and only the lower-pitched, clearer "murmuring" remains. And, just yesterday I was trying to figure out a song I heard in the morning from my brother's deck in Austin -- an accelerating series of buzzes. The best I could come up with was Black-throated Blue Warbler, which shouldn't be there, and the song, though close, did not sound quite right. Later in the day, I heard the song much closer, and heard a little higher-pitched down-slurred whistle at the end. And then I caught a glimpse of my lifer Golden-cheeked Warbler. The song was a Type I song (mate attracting song, I think, and it wasn't on the recordings I'd listened to before. <br /><br />That's a long-winded way to say that I believe the environment -- how many leaves and trees there are for soundsto bounce off of -- is a significant factor in what gets heard and propagated in the environment, with higher frequencies getting attenuated much more easily. I can send along some references about sound attenuation if you'd like. Laurahttps://www.blogger.com/profile/02381055601684353996noreply@blogger.comtag:blogger.com,1999:blog-4723513682494143228.post-86764067068764914522015-03-29T09:00:25.333-04:002015-03-29T09:00:25.333-04:00Wonderful post Lisa. It would be interesting to se...Wonderful post Lisa. It would be interesting to see if the chickadees in these noisy environments are shifting the frequency range of their songs to avoid the masking effects. Perhaps there are some old recordings of CACH in the Borror collection from the same parks that would show what the songs were like decades ago before the noise was really loud.Wilhttps://www.blogger.com/profile/16943273150962683996noreply@blogger.com