Naturalists fear overuse of birdcall apps
On a spring morning in North Seattle, a chestnut-backed chickadee - let's call him Chuck - was taking care of business when he heard an alarming sound: the high-pitched song of another male.Chuck swooped in to investigate. Perched in a hemlock, he cocked his head, listening for the intruder. Hearing no repeat, he voiced his "chick-a-dee-dee" challenge. He then flew off, paying scant attention to the gray-haired man holding an iPod-speaker combination the size of a coffee mug.
"I promise I'll never do this to you again," said Dennis Paulson, a veteran birder and director emeritus of the Slater Museum of Natural History in Tacoma, Wash.
Paulson was demonstrating a technique that's hatched a flap among bird-watchers: the use of recorded calls to flush out species for better viewing and photography.
These being folks who love nothing more than tramping around with binoculars, the sparring is mostly polite. It's a given that no one wants to harm a feather on a sparrow's head. But the question is whether being summoned by a phantom rival may, in some cases, actually put birds at risk.
"It stresses the birds, I wouldn't deny that for a minute," Paulson said. "But as far as I know, it's a very, very short-term stress." His personal rule is to use "playback" rarely and only where birds aren't likely to ever encounter recorded song again - deep in the woods or, just this once, his forested yard.
But for many other birders, playback has become a tool of first resort, thanks to the proliferation of smartphones and apps that can crank out tunes from every species on the planet. At the same time, birders share unusual sightings and hot spots via the Internet, which can mean the same birds are blasted over and over.
"It has gotten much more common," said Dr. Jack Stephens, president of the Washington Ornithological Society. He recalls the days when only the most expert birders bothered to cart bulky tape players into the field. "Now, you see people get out of a car and the first thing they do is pull out a recording and start to play it on a loop."
Like most birders, Stephens is middle-of-the-road on playback. He cringes at overuse. But, after 45 minutes of fruitless scanning on a Texas trip, a song snippet earned him a glimpse of a Swainson's warbler, one of North America's most secretive species.
While delightful to our ears, singing is serious for birds. Males pour their hearts out to impress the ladies. They trill to proclaim territory and keep other males away. Every strange song - whether from another bird or an iPhone - registers as a threat.
High Pitch Sound - News
SEATTLE -- On a spring morning in North Seattle, a chestnut-backed chickadee - let's call him Chuck - was taking care of business when he heard an alarming sound: the high-pitched song of another male. Chuck swooped in to investigate.
You're walking to sixth period and you suddenly hear the noise you have been dreading all day, the high pitched squeals and giggle of cousins Alli Driscoll and Lauren Pandes-Carter. You instantly become tense and think: how can I possibly deal with
The sudden explosion of high-pitched squealing scares him so much that he runs away and starts talking to their teachers. 14.47 Shrieking teenage girls drown out all other sound on the BBC's coverage. It's like Beatlemania.
Porn is decidedly high pitched, quick changing and repetitive. Using what they had learned, the two Kims were able to classify different types of audio and distinguish them as porn sounds or not. When tested across multiple soundtracks, they achieved a
The researchers, who obviously watched an awful lot of porn, found that while speech is low-pitched and music is variable, pornographic sounds are generally high-pitched, change tone rapidly, and periodically repeat. Surprisingly, this "moan detector"
High pitched engine noise - iRV2 Forums
My '97 460 used to only make a high pitched noise under extreme load with WOT but now it is making it almost constantly. Just the volume varies with load, not the pitch. It sounds electronically generated because of the constant high pitch. I would think a bearing failing or wind noise would vary in pitch. Of course, it sounds like its coming from anywhere and everywhere. Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
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Well, I'll give you something to look at. My 97 460 became very noisey one day and it turned out to be the EGR valve. Don't ask me what happened, cuz I don't know but replacing it quieted the thing down. Had to have a buddy drive while I had my doghouse slid back and me laying on top of the engine to narrow down exactly what was making noise. Good luck.
I hate when girls tryna sound cute and make their voice high pitch.
Dear I am now partially deaf in my right ear due to a very high pitch sound on your 17:57 from Euston to Glasgow (more)
some bass into the Rich Kidz voices...y'all music is fye...but w/ all that high pitch y'all sound like Alvin and the Chipmunks.
These lil old ladies downstairs is hella funny both have high pitch voices n arguing right now. Sound like 2angry chipmunks
Heard a loud high pitch scratching sound there is a car inches from mine in the driveway and 5 people standing around. I'm scared :-/High Pitch Sound - Bookshelf
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