Acoustics / Feed

Acoustic monitoring is one of our biggest and most active groups, with members collecting, analysing, and interpreting acoustic data from across species, ecosystems, and applications, from animal vocalizations to sounds from our natural and built environment


Which market-available microphones, accelerometers and GIS sensors for dogs / pets ?

I have conducted an MSc thesis in data-science applied on bioacoustics data, and wish to carry on some experiments on my own now, using domestic environment as a lab.I am looking...

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Hi Luigi!


You should have a look at the μMoth

 developed by @alex_rogers and others from Open Acoustics Devices:

As an alternative audiologger meant to be animal borne, check out the Audiologger developed by Simon Chamaillé-Jammes @schamaille et al :

This one can also log acceleration and magnetometry! We have recently deployed it on muskoxen in Greenland.

For a GPS tracker, you may want take a look at the SnapperGPS by @JonasBchrt & @alex_rogers :

As an alternative the i-gotU GPS logger may be of interest:

Regarding your question on sampling frq: We have been using 8Hz (and 10 Hz on the Audiologger Acceleration logging) for our slow moving muskoxen. For an animal like a dog, you probably want to sample at somewhat higher frq. This group used 50Hz in a study of arctic fox: 



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Bird Acoustic Surveys: Comparison with traditional transect methods

Baker Consultants Releases Whitepaper Comparing Traditional & Ecoacoustic Bird Survey MethodsBaker Consultants is pleased to announce the release of its latest ecoacoustics...

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Thank-you for sharing this study, I read it with interest! I was wondering, in doing this study did you also get a feel for how these methods compare in terms of time and costs and required skills? As a practitioner I am still a bit worried about the amount time required for set up, maintenance, data management, species identification, and analysis. 

Hi Theresa.  In comparison to traditional survey, I think that the time/cost benefits of acoustics are good.  Certainly the set-up, maintenance, and data management requirements are minimal. And if there is significant travel time to site, and the recording period of acoustic survey is long, then I think the benefits are compounded (i.e. there are economies of scale to acoustics that you don't get with trad surveys).

Until the last year or two, the data analysis for species identification has been the time-consuming part.  However, now that systems such as BirdNET are available, this issue is fairly well dealt with (but still needs a little bit of skill/experience).

A couple of scientific papers have assessed these costs/benefits - I hope these make an interesting read.



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Deploying Song Meters in Nigeria

Exciting deployment of these acoustic song meters by Wildlife Acoustics, Inc. in another one of the Important Bird Areas in Nigeria - International institute of tropical...

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Hi Joan,

Sounds like a great project! I would recommend having a look at some of the nice review literature and guidelines that are out there, like - 

And some specific to nocturnal birds:

And a study on bird acoustic monitoring in Nigeria:


In terms of processing and analyzing the data, I work for Rainforest Connection which maintains Arbimon - a free, no-code ecoacoustic analysis platform to help automate species detection and classification within soundscapes. If you're interested, you can get started with our support docs!

There are also a number of stats packages for analyzing soundscape data (seewave, monitoR, warbleR in R; and OpenSoundscape, scikit-maad in Python).  

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New Raspberry Pi Sound Localizing ARU is now fully released and ready for use

Hi All,My low cost Raspberry Pi based sound localizing ARU is now fully released and ready for use. You can download it from here: It installs and configures with just one...

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super cool - thanks for sharing!!

I'm wondering if this software might be adapted to post-processing recordings from a collection of Audiomoths, if they all had GPS synch, and reasonable care was taken to document their relative positioning.

Well I’m just using the opensoundscape library whose purpose was likely exactly that.

I would expect that there should be pointers to that sort of pipeline from audiomoth itself. But I’m just guessing.

But in short. So long as you can generate input for each as in the following example from at least three mics per event. The localization program will spit out a location.

51.01415,5.813725 2023-09-17_15-49-48.523601
51.015365,5.81165 2023-09-17_15-49-48.822030
51.016368332,5.814084879 2023-09-17_15-49-48.715324
51.015221667,5.815915 2023-09-17_15-49-48.545999
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Hydromoth for coastal & offshore surveying

Hi all! I'm interested in deploying a Hydromoth on an Uncrewed Surface Vehicle (USV) to collect acoustic data for biodiversity analysis, for coastal and offshore marine surveys....

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Hi Sol,

I think your concern is well placed.  The pros typically tow an array of hydrophones, in its simpler configuration it looks like a long fat rubber hose containing maybe a dozen transducers feeding their electrical signals to a recording unit back on the ship.  All this is done to reduce noise from the ship, from waves crashing, and flow noise.  The multiple transducers can also be electronically tuned to be directional so that it can be "pointed" away from a noise source (like the ship).

In your position, I would just try the simplest thing that could work, then fix the problems as they arise.  It could be you may need to be dead in the water while recording.  To address surface noise (slapping waves, wind), you could mount the hydromoth low down on a spar buoy, which you tow into position.


Best of luck, it sounds like an interesting project (c:

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Owl call detection software

I’m curious about AI software for analyzing nocturnal bird calls, particularly for detecting owl species. I currently use Nighthawk for help with processing my ARU audio files,...

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Hello Whitney,

Arbimon, as Carly mentioned can be useful, as can the Cluster Analysis tool of Kaleidoscope Pro software. I would also recommend having a look at the new Learning Detector Tool of Raven Pro (link describing it is included below), which taps into the BirdNet database. Assuming you work in parts of the world where most (vocal) bird species are included (e.g. North America, Europe), then you can select the Learning Detector tool to scan for calls of the selected bird species with a threshold that you decide. 

All the best,



Interesting! I am also embarking on something similar but thinking of using Raven Pro + BirdNet

Colleagues of mine at the BTO have recently extended the functionality of the Acoustic Pipeline recently (which previously focused on the sound identification of European bats, small mammals and bush-crickets) to also include birds - to support batch processing of recordings. See link below.

This includes a specific classifier for nocturnal breeding birds in Europe - including European owls (also classifiers for nocturnal flight calls for migrant birds - NOCMIG etc.

For people that are happy to share individual clips that are of interest to us, the new bird sound identification functionality is free to use. 

I wasn't sure whether you were based in Europe, but if you are, this may be worth trying out.

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Flying with li-ion batteries

Hi everyone, quick question about travelling with acoustic monitoring kit:Has anyone had experience flying international from the US with a load of 18650 Li-ion...

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The 18650s should be packed in discrete holders to separate them and prevent them from shorting. I've taken up to 50 on a plane before. 100 might be a tall ask since most planes have limitations on total Amp Hours you can bring. 

These are the holders I use.

Good luck.

Thanks Akiba, good to know you had no problems with those, and those cases look good. Having read a bit more, it actually seems that in theory there is no limit to the number of batteries you can bring, as long as each is <100Wh. Seems like I'll be testing that theory...

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Seeking AudioMoth in SF Bay Area

Hello Everyone.  Dire situation here. A group or UC Berkeley undergrads is looking to borrow an AudioMoth. Theirs was lost in transit during delivery and their entire...

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I have an AudioMoth that they are welcome to.  I'm down in Moss Beach (just north of Half Moon Bay).

You're awesome Tim, thank you!  However, we ordered another from GroupGets yesterday and it's arriving tomorrow, so we (should) be good to go : )  Now if I can only get LabMaker to reimburse me for the one that didn't arrive, that would fix everything.  Unfortunately they've been incredibly slow to reply ....sigh

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Replacement (cheaper) foam mic covers

Hi everyone; looking for a source of (cheaper) foam mic covers suitable for the stub mics on a Song Meter Mini.  I've always purchased the 'official' ones but as the price of...

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Hi! I got these ones from Amazon. Also, I was tired of creatures eating them so I created a shield using window mesh screen


Hi - thanks for your reply.  I've been thinking along the same lines though unsure where I'd purchase 'acoustic foam' from.  I've made 'dead cats' before for some of my active monitoring mics and that material is not too difficult to source but the only acoustic foam I've come across is the type for deadening sound in studio etc. - the exact opposite of what I want!!  The search continues ....!

Brilliant - thank you.!  Great idea about the screen too - I'm replacing some of them monthly so may try that myself.  Have you found any issues with the mesh generating any tones with wind?

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BirdWeather | PUC

Hi Everyone,I just found out about this site/network!I wanted to introduce myself - I'm the CEO of a little company called Scribe Labs.  We're the small team behind...

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I love the live-stream pin feature!

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Searching for researchers working in Africa

Hi all,I work for World Vision Australia on a project called "Scale Up FMNR" (Famer Managed Natural Regeneration). At its most simple level, FMNR is a practice that encourages...

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Hi Andrew,

Rainforest Connection (RFCx) has projects in a couple different countries in that region, and also working with agroforestry systems to monitor biodiversity using acoustic monitoring! You can read more about that project (Kenya) here: We've also got a project working with small-scale cacao farmers in Colombia to monitor biodiversity in their cacao plots. For some background, RFCx is a non-profit focused using sound and AI to monitor biodiversity and detect threats, and we also manage the Arbimon acoustic analysis platform. 

I'd be happy to talk through ideas further if you'd like, feel free to reach out! [email protected] 

All the best,


HI Andrew,

I am replying to the "elsewhere". I am based in Aus but travel and work in the Arts/ Science field of field recording, often with scientists. I have been acoustic monitoring a peri-urban site in Victoria with a local council. The subject is a wetland, transferring from farmland to a wetland public space that is now surrounded and impacted by urban infrastructure. I was lucky enough to get sounds before, during and after CoVid lockdowns so we can hear a stark comparison of anthropogenic sound.

I'd love to chat further about this and other work I do if this fits your collaboration criteria. 



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PAM workflow and file question

Hey everyone,I have been working in Arbimon to identify the call of an animal I'm studying (hack call of Ceropithecus nictitans), and have 400 presences and 500 absences in my...

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Like this:

ffmpeg -i input.wav -f segment -segment_time 60 -c copy output%03d.wav

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In case you missed it... (no.2)

Five #tech4wildlife people, projects and updates that caught my attention this month. This issue is a naturetech, biodiversity startup edition! Featuring a living map of the biodiversity startup scene, is nature data...

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Acoustic Monitoring Specialist

The Institute for Bird Populations (IBP) seeks a California-based acoustic monitoring specialist to collect, manage, and process avian acoustic data from multiple research and conservation projects across California...

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Soundscapes and deep learning enable tracking biodiversity recovery in tropical forests

New paper in Nature Communications from Jörg Müller et al. using BAR-LT recorders and CNNs to track biodiversity recovery. Study shows that #soundscapes 🎙🎶 and deep learning are powerful tools for tracking biodiversity recovery in tropical forests


Is there a good resource for learning bird calls?

This question popped up on Twitter (or x?) and has had some interesting replies! I thought I'd start it as a discussion here too, and not limit it to australia, as it feels...

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Some of the recommendations Kylie has been getting: 

A few more! 

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