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Gerryislandgirl t1_izxklfn wrote

Reply to comment by QE7 in Are some North American bat species more likely to reside in man-made structures than others, or is the choice of habitat typically consistent across all bat species? by OrganicDroid

“ they tend to crowd out other species by direct (i.e., echolocation jamming)”

Are you saying they jam another bat’s radar?

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QE7 t1_izxn3mq wrote

Essentially yes, although technically it’s not radar (radio waves) but sound waves. Here’s some good reading on the topic: https://www.science.org/content/article/holy-blocked-bat-signal-bats-jam-each-others-calls#:~:text=The%20jamming%20call%20works%20by,a%20process%20known%20as%20echolocation.

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lord_ne t1_izy0znl wrote

>technically it’s not radar (radio waves) but sound waves

Sonar would be a better comparison, right?

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lfrdwork t1_izyv316 wrote

I believe so, and that ships using sonar do have an effect on marine animals in the area. How much of an effect can vary, but the volume of the sonar pulse can cause direct harm.

https://www.google.com/amp/s/amp.theguardian.com/us-news/2016/jul/16/us-navy-banned-from-using-sonar-that-harms-dolphins-and-walruses

That was the first link I grabbed that discussed the fact. I'm sure there are more detailed studies that can give understanding and methods for research.

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CassandraVindicated t1_izz6pbh wrote

Modern sonar can kill marine animals with a wide area of effect. Militaries don't like to talk about it, but there's plenty of proof.

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Howtomispellnames t1_izz953z wrote

I learned this one just last week or so. Awful fact. The sonar from a navy sub can essentially liquefy you if you're close enough. Whales will swim hundreds of miles out of their way to avoid navy sonar. Sperm whale sonar is also loud enough to kill.

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CassandraVindicated t1_izzkaqt wrote

Well, at least nature did it first. I'm ex-Navy and it is an awful fact. It's not needed and isn't worth the price.

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HardlightCereal t1_izzplfp wrote

Who would have guessed that the branch of the government dedicated to killing people would kill animals too???

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CassandraVindicated t1_izzr1fw wrote

Ok, that's a fair point, but what these new sonars can do, it's like setting off a small nuke underwater. That's a little bit extreme; we wouldn't just nuke some land based target willy nilly. We shouldn't be doing it in the ocean.

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DaSaw t1_izzt6in wrote

Fortunately, I have heard that the Navy have been investigating a passive alternative. You know how someone who is intimately familiar with the sounds of a forest can detect the approach of dangerous animals (including humans) by noticing changes in the sound of animals and insects and stuff? Apparently, they're working on a system that can use marine sounds for the same purpose.

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UsedUpSunshine t1_j03rwqo wrote

I’d throw money at people for that to get done. Other night I was sitting outside enjoying nature when suddenly it got too quiet. The dogs stopped barking, the bugs went quiet. I jumped in my car real quick. Even I felt that there was something lurking. Didn’t see what it was, but I didn’t leave the car again for a while.

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HardlightCereal t1_izzrj9w wrote

https://www.forbes.com/sites/niallmccarthy/2019/06/13/report-the-u-s-military-emits-more-co2-than-many-industrialized-nations-infographic/

The consequences of climate collapse due to CO2 pollution could potentially be as damaging to the environment as a nuclear war. So yes, the military does effectively nuke land based targets willy-nilly

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CassandraVindicated t1_j0dtd85 wrote

The military (at least in the US) is not anywhere near being close to a top polluter. They led the way in remote solar and organically produced fuel. They've effectively become one of the oldest green friendly organizations.

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Unicorny_as_funk t1_j01s9tt wrote

So they’re screaming over each other to cause confusion and disorientation?

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Catfrogdog2 t1_izyl34p wrote

Also many moths have anti-bat ultrasound detection. You can demonstrate this by jingling a bunch of keys (a ready source of ultrasound) near a flying moth, and it will take evasive manoeuvres like dropping to the ground.

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[deleted] t1_izxlz3p wrote

[removed]

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