Acoustic sensors enable efficient and non-invasive monitoring of a wide range of species, including many that are difficult to monitor in other ways. Although they were initially limited in application scope largely due to cost and hardware constraints, the development of low-cost, open-source models like the Audiomoth in recent years has increased access immensely and opened up new avenues of research. For example, some teams are using them to identify illicit human activities through the detection of associated sounds, like gunshots, vehicles, or chainsaws (e.g. OpenEars).
With this relatively novel dimension of wildlife monitoring rapidly advancing in both marine and terrestrial systems, it is crucial that we identify and share information about the utility and constraints of these sensors to inform efforts. A recent study identified advancements in hardware and machine learning applications, as well as early development of acoustic biodiversity indicators, as factors facilitating progress in the field. In terms of limitations, the authors highlight insufficient reference sound libraries, a lack of open-source audio processing tools, and a need for standardization of survey and analysis protocols. They also stress the importance of collaboration in moving forward, which is precisely what this group will aim to facilitate.
If you're new to acoustic monitoring and want to get up to speed on the basics, check out these beginner's resources and conversations from across the WILDLABS platform:
Three Resources for Beginners:
- Listening to Nature: The Emerging Field of Bioacoustics, Adam Welz
- Ecoacoustics and Biodiversity Monitoring, RSEC Journal
- Monitoring Ecosystems through Sound: The Present and Future of Passive Acoustics, Ella Browning and Rory Gibb
Three Forum Threads for Beginners:
- AudioMoth user guide | Tessa Rhinehart
- Audiomoth and Natterjack Monitoring (UK) | Stuart Newson
- Help with analysing bat recordings from Audiomoth | Carlos Abrahams
Three Tutorials for Beginners:
- "How do I perform automated recordings of bird assemblages?" | Carlos Abrahams, Tech Tutors
- "How do I scale up acoustic surveys with Audiomoths and automated processing?" | Tessa Rhinehart, Tech Tutors
- Acoustic Monitoring | David Watson, Ruby Lee, Andy Hill, and Dimitri Ponirakis, Virtual Meetups
Want to know more about acoustic monitoring and learn from experts in the WILDLABS community? Jump into the discussion in our Acoustic Monitoring group!
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Description | Activity | Replies | Groups | Updated |
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Joachim and Carlos, Thank you both very much for all your help so far with this problem, all of your input is very constructive. I have had look into the CCTV tech and also... |
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Acoustics | 5 years 2 months ago | |
What frequecy are you looking to record, how long does the mic need to run for, what is the distance between the microphone and the "listening" site? As... |
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Acoustics | 5 years 2 months ago | |
How about using Kaleidoscope and the cluster analysis tool? Works fine, and is super-quick.. Ta, Carlos |
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Acoustics | 5 years 3 months ago | |
I'll be there - on the Wildlife Acoustics stand... Please come and say hi! Carlos |
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Acoustics | 5 years 3 months ago | |
Update The current AudioMoth group purchase reached our stock level of 1550 devices, hence the campaign has closed early. We'll now set up the manufacturing run and update... |
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Acoustics | 5 years 3 months ago | |
Please find attached, a short note wherein we propose 03 postulates of soundscape ecology. The focus here is in soundscapes than sound of... |
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Acoustics | 5 years 3 months ago | |
Dear colleagues, we are designing a study to document presence or absence of spider monkeys in forest fragments in western Ecuador. We... |
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Acoustics | 5 years 3 months ago | |
Thanks! We also just posted info on the AVISONA 2019 event to the resources page for anyone who missed it and wants to learn more. |
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Acoustics | 5 years 3 months ago | |
Forgot to say - if you are having trouble reformatting SDcards on Windows- the project suggests this programme http://www.ridgecrop.demon.co.uk/index.htm?guiformat.htm. |
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Acoustics | 5 years 4 months ago | |
Over the past year I have been involved in a project trying to detect illegal fish bomb blasts in Tanzania using acoustics. We have 4 long... |
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Acoustics | 5 years 5 months ago | |
Hi, I've made an initial attemp to design a 3D printed case for an audiomoth (with 3 x AAA battery pack) and have made it available... |
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Acoustics | 5 years 5 months ago | |
Hi All, These are well-produced online introductory videos for the use of the Raven software for acoustic analyses. Really... |
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Acoustics | 5 years 5 months ago |
Acoustic monitoring fieldwork positions in Puerto Rico
22 February 2023 2:41pm
Texas Chapter of The Wildlife Society’s Annual Meeting 2023
20 February 2023 10:56pm
Research Assistants in Kitzes Lab
16 February 2023 4:12pm
Developing Two Non-invasive Survey Methods for Freshwater Ecosystems: Environmental DNA and Ecoacoustics
10 February 2023 10:41am
Interesting PhD thesis just shared via ResearchGate, looking at developing eDNA and bioacoustics to 1) detect invasive/endangered crayfish & identify rivers vulnerable to invasion, and 2) Describe pond soundscape ecology/phenology, & provide guidelines for survey design.
Swift Software Developer - Lab of Ornithology
10 February 2023 10:38am
Research Associate - Machine Learning (Underwater Sound)
10 February 2023 10:19am
Cleaning audiomoth circuit board
17 January 2023 11:42am
2 February 2023 8:13am
Hi Akiba,
thanks for your this great advice! I used the conformal coating on parts
of the PCB with exposed metal but was has hesitent using it on the "backside" with
all the resistors and transistors. Also what about the "back" of the microfon. Might this side be coated?
Do you have any experience with coatings @alex_rogers
Greetings,
Robin
9 February 2023 9:56pm
Cleaning the water damaged audiomoth boards is in full swing:
Left before, right after cleaning
Technical Officer – IMOS Animal Tracking Facility
7 February 2023 12:30pm
Commercially available connected audio sensors
2 February 2023 3:08pm
2 February 2023 3:55pm
Hi!
I am not aware of any such connected loggers/recorders but they would be nice.
The AudioMoths have been revolutionary in providing audologging at a low cost but they take a lot of "data muling" (carrying SD cards in and out of the field sites) and swapping of batteries.
Cheers,
2 February 2023 7:50pm
Hi Lars, thanks for the response. We are using lots of Song Meter Micro's atm and they have proved to be resilient. Just need something which doesn't involve going on site regularly - but get the data off.
3 February 2023 7:04pm
Rainforest Connection's (RFCx) Guardian devices may be of interest. They are solar-powered and have connectivity options for Wifi, GSM and satellite transfer. They've previously been used for detecting e.g., gunshots or chainsaws (using edge computing) and then sending positive detections/alerts to folks on the ground. RFCx also hosts Arbimon, a free, no-code software platform that facilitates analysis of audio data as well. Happy to chat more if you'd like to talk further about it!
Job: Building a network of conservation tech across continents
2 February 2023 1:50pm
Consultancy opportunity: Wildlife monitoring specialist
31 January 2023 11:26am
AI for Forest Elephants Challenge
25 January 2023 3:34pm
Pandas & Prose with Karen Bakker and David Thau
19 January 2023 11:55pm
Apply Now: AI for Conservation Office Hours
18 January 2023 5:15pm
International Congress for Conservation Biology
16 January 2023 2:53pm
Potential collaboration: integrating acoustics and NASA airborne remote sensing to monitor animal and habitat biodiversity
30 November 2022 1:17am
10 December 2022 6:18am
Although not a professor, I know a fair number through long-term association with scgis.org, and personally am using Audiomoths in collaboration with the UC System at the Blue Oak Reserve.
I've developed a fair bit of scripts to automatically crunch things using 'Birdnet', as per:
I can certainly facilitate dialogue with the Cornell Ornithology lab if you do not have those connections already.
My own background is in remote sensing (SAR, etc) and currently working in machine learning (albeit for health care currently..) this project sounds fascinating!
Are you already working with Audubon, and/or people in the UC System?
10 December 2022 6:22am
I'll also note that I'm planning to work with a few parks in the DRC/Congo basin to deploy Audiomoths alongside their camera traps.
13 January 2023 12:24pm
Dear Antonio,
It is a long-shot, but this may be relevant to what you are looking for? I have collected across 4 seasons (2022) 8-10 days/season acoustic data from 11 stations located at pine forests of different post-fire regeneration stage (>20 years since last burn, burnt in 2001, 2009, 2018) in Greece. These are typical Mediterranean forest pine landscapes - but certainly not in California or South Africa. We did not have plans at present to continue collecting data - since we got all seasons of one year, but may be the existing data or future data from these or similar areas here in Greece would be relevant to what you wish to accomplish with the airborne measurements?
Feel free to drop me a line.
All the best,
Christos
New Paper - The sound of the illegal: Applying bioacoustics for long-term monitoring of illegal cattle in protected areas
12 January 2023 5:20pm
This study uses passive acoustic monitoring to record the patterns of illegal cattle occurrence within protected areas in the Brazilian Pantanal.
WEBINAR: Earth, Wind & Fire: Amphibian Response to Wildfires, Windfarms, & More
11 January 2023 5:59pm
Conservation Technology Intern (Vietnam)
11 January 2023 5:00pm
Education Paper on Computer Vision for Ecology
9 January 2023 5:30am
Job: Conservation Technology Specialist (PT)
6 January 2023 12:49am
Job: maker / workshop technician
5 January 2023 10:53am
San Diego Zoo needs Summer Undergraduates!!
19 December 2022 1:58pm
Upcoming PAM & R Ocean Science Courses
16 December 2022 3:27pm
PhD - Sensory ecology of vespine wasps
8 December 2022 12:47pm
New paper - First population estimates of two Critically Endangered frogs from an isolated forest plateau in Madagascar
28 November 2022 4:19pm
Acoustic survey data is used to estimate the diversity of critically endangered amphibians in the fragmented forests of Madagascar.
Unifying acoustic metadata
2 November 2022 10:21am
3 November 2022 12:34pm
Hi Ellie - OK sure thing - I can set up an article too.
4 November 2022 3:47pm
Hi Jamie, this is super exciting! I had not realized that PAMGuard integration was going to be part of the plan for Tethys - so thrilling!
One quick question - when processing large datasets, often I end up with a series of binary/database files (e.g., separate runs for separate frequency bands). Does Tethys accommodate the multiple file scenario?
Would love to give it a whirl when appropriate.
7 November 2022 12:32pm
Yeah, it's an exciting project. Also will be a great excuse to improve PAMGuard documentation - something sorely needed. Python libraries also on the way as part of this.
As for Tethys, yes it will accommodate the multiple configuration file scenario - ideally the end game will be that any configuration you use in PAMGuard will be directly exportable to a Tethys database. If you use multiple configurations, then each is a separate Tethys database, however, when these are exported they can be amalgamated into one because the Tethys is clever enough to know these are the same data processed in different ways.
"Would love to give it a whirl when appropriate. " - might be a while but noted! :-)
28 January 2023 5:40am
I'd also add that if the boards are just dirty or dusty, you can just remove all batteries, then wash with a toothbrush and water. Air dry (or use compressed air which speeds things up greatly) and then spot clean areas that need solvent with isopropanol as Harold mentioned. Also if you don't have access to conformal coating, you can also use a non-conductive clear lacquer. The conformal coating covers all the components and prevents short circuits due to conductive water (ie: salt water) or other contaminants. However if you do use a conformal coating, make sure all cables are connected first and the device is in the exact state that it will be deployed in. Also don't conformal coat the battery connectors since you'll want to change out batteries periodically.