Questions tagged [air]
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High Frequency broadband sound at night in a recording - can I rule out biophonic sources?
I have conducted passive acoustic monitoring at a nature reserve (a wetland, near a city and two medium-sized roads). At night only, I have a strange source of sound that goes on and off every now and ...
Shotgun microphone position for low-level sounds in a tube
I would like to record extremely low sound-level (at ~200-300Hz), produced by an insect which is located at the end of a plastic tube, with a very-sensitive low-noise shotgun pressure microphone (this ...
Is it true that cats don't really meow at each other, but rather at humans as a way to communicate?
This is one of those little factoids that is tossed around a lot. Cats meow as a means to communicate with humans, and not really at each other. It's a fact passed around at parties or in pop sci ...
How much does inner city noise mask bat echolocation?
When traveling in a very busy,very loud city recently, I noticed a few small bats clearly feeding on bugs attracted to a street lamp. I was on a party street, and there was loud music pouring out of ...
Are "acoustic waves" the same as "mechanical waves"?
In my physics program, “acoustics” was referring to any mechanical waves that use local compression/rarefaction of medium particles to propagate, whatever the propagating medium (gas, liquid, solid). ...
Guidelines/Standards for terrestrial ecoacoustics studies
Can you provide useful resources about existing guidelines/standards (or even common practices) for terrestrial ecoacoustics studies (recording entire soundscapes, not specific taxa)? More ...
Are acoustic-based methods used in insect pest control?
While semio-chemical repellents are widespread to tackle insect pest, acoustic-based methods seem to be less commun. I only found this example where it has been used as a commercial tool by disrupting ...
Locating birds by their calls with improvised equipment. Can algorithms rescue this setup?
In winter, I can usually hear one or two birds in an area, and I occasionally see them flitting through the air – but it's usually too dark to see them except in motion, silhouetted against the sky. ...
Is there any insects which produce sound with their mouth part?
Many animals produce sounds with the help of their lungs to make their vocal folds vibrate, and then use their vocal tract to amplify some frequencies. Is there any insects which sounds are diffused ...
Do ultrasound mosquito-repellents work?
There are many anti-mosquito devices for sell that use ultra sounds as a repellent (e.g. see here). Is it supported by science?
What kind of light do you use in the lab to avoid any sound noise?
It can be tricky to have a perfect silence in an experimental space, even if soundproofed. But it is required especially when low sound-level communications are studied such as with arthropods. One ...
Filter or modify an in-air sound to make it sound how it would underwater?
I have recordings of a particular sound generated by a fishing vessel. Our team is trying to identify what exactly ON the fishing vessel is the source of that sound we as of yet only have underwater ...
Could mosquitoes be attracted to the sound of their blood host?
At long-range, female mosquitoes mostly rely on CO2 to find blood host by flying up-wind following the odor plume (ref). They are also known to have excellent auditory organs (ref1, ref2) involved in ...
Where are BirdNET saved observation sound snippets saved on an iPhone?
I've recorded some sounds using the app BirdNET (https://birdnet.cornell.edu/) and would like to share/export some of the recorded observations I made and saved. I cannot find them within my iPhone's ...
What are the main differences in recording solid-borne, water-borne and air-borne sounds?
Bioacoustics is the study of how animals communicates with any acoustic waves. Strickly speaking, it involves any substrates where the acoustic waves propagate: liquids (water), gas (air) and solids (...