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!
Header image: Carly Batist
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Link
News about a population survey of California Spotted Owls using 1,600 autonomous recording units in the Sierra Nevada region. Machine learning made analyzing this acoustic data possible at this large scale for the first...
29 August 2023
Careers
Reviewing Now: Animal Telemetry Postdoctoral Fellowship
Smithsonian Institution
The Smithsonian Institution seeks a field- and data-oriented biologist to support marine animal telemetry research and to assist with activities of the Atlantic Cooperative Telemetry (ACT) Network.
24 August 2023
Careers
RFCx/Arbimon is hiring a Quantitative Ecologist!
Carly Batist
Apply to work on a wonderful team translating acoustic monitoring data into conservation & ecological insights!
11 August 2023
Link
This article discusses Cornell's bioacoustics work with AI tools to recognize both elephant "voices" as well as gunshots. The elephant rumbles analyzed in this work are almost imperceptible to the human ear, but can be...
9 August 2023
Article
#Tech4Wildlife Photo Challenge: Judges' Panel Honorees
WILDLABS Team
Please join us in celebrating this year’s top #Tech4Wildlife Photo Challenge Honorees as chosen by our panel of leading conservation organization judges, and enjoy the story contained within these entries about how our...
4 August 2023
Careers
Senior Technical Specialist, Monitoring & Technology, ZSL
Anthony Dancer
Exciting opportunity for an experienced biodiversity monitoring expert in ZSL's conservation department
18 July 2023
Article
New Updates to Carbon Mapper Data Portal
Stephanie O'Donnell
Global methane data and new functionaity on the Carbon Mapper Data Portal
12 July 2023
Careers
RFCx/Arbimon is Hiring a Data Scientist!
Carly Batist
Apply to work with an absolutely all-star group developing AI/ML techniques and models for acoustic monitoring!
28 June 2023
Article
Request for proposals - Biodiversity + tech solutions
Anna Colquhoun
The GSMA ClimateTech programme
21 June 2023
Careers
Job opportunity in Leiden, The Netherlands
9 June 2023
Careers
Wildlife Monitoring Engineer
Tom August
Permanent and Full Time role at the UK Centre for Ecology & Hydrology
8 June 2023
Funding
Field Inclusive, Inc. is offering a $2000 travel award to students to attend bird-focused conferences, workshops, and trainings. Interested acoustic monitoring community members should apply by July 31st for...
2 June 2023
August 2025
event
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September 2025
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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 | 6 years 5 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 | 6 years 5 months ago | |
| How about using Kaleidoscope and the cluster analysis tool? Works fine, and is super-quick.. Ta, Carlos |
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Acoustics | 6 years 5 months ago | |
| I'll be there - on the Wildlife Acoustics stand... Please come and say hi! Carlos |
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Acoustics | 6 years 5 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 | 6 years 5 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 | 6 years 5 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 | 6 years 6 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 | 6 years 6 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 | 6 years 7 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 | 6 years 7 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 | 6 years 7 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 | 6 years 8 months ago |
The WILDLABS Variety Hour: March 2023 - YouTube
30 March 2023 4:04pm
Global shortage of Raspberry Pis - What are the alternatives
3 November 2022 10:27am
29 March 2023 10:13am
UPDATE: The Banana Pi didnt work out for us as it was not possible to track back all the components and ensure that they were responsibly sourced. The Rock board did work for us and we were able to port our system onto this. We will be rolling out units using this over the summer. It also looks like Raspberry Pis are coming back on line and we were able to secure a bulk order for deliver mid-summer
29 March 2023 10:14am
Yes, but for our needs that are not powerful enough
Exploring storage options for mass data collection
22 March 2023 3:20am
22 March 2023 7:36pm
Hi Adam!
I mostly live within the ecoacoustics space so I'll just speak on the hydrophone part of your request; Arbimon is a free web/cloud-based platform with unlimited storage for audio files. We've got an uploader app as well for mass-uploading lots of files. There's also a bunch of spectrogram visualization/annotation tools and analysis workflows available. It's AWS running under the hood.
I have some experience working directly with AWS & Microsoft Azure, and I've found personally that AWS was more user-friendly and intuitive for the (fairly simplistic) kinds of tasks I've done.
27 March 2023 5:23am
Alex Rogers: Acoustic Devices for Biodiversity Monitoring — Smart Forests Atlas
24 March 2023 12:28pm
Alex Rogers: Acoustic Devices for Biodiversity Monitoring — Smart Forests Atlas
In this radio episode, we speak to Alex Rogers, Professor of Computer Science at the University of Oxford. Interviewers: Max Ritts and Michelle Westerlaken Producer: Harry Murdoch Listen on Apple and Spotify.
Catch up with The Variety Hour: March 2023
23 March 2023 11:09am
Using acoustic monitoring to track infectious disease risk
8 March 2023 1:29pm
Proposals wanted for Innovation in Practice
6 March 2023 10:34pm
USD500 available for your workshop
6 March 2023 1:30pm
AudioMoth and Song Meter Micro battery life tests
16 February 2023 4:09pm
24 February 2023 2:20pm
Hi Justin, looks like the link is not working!
24 February 2023 5:23pm
Should work now - a stray full stop snuck in there!
26 February 2023 2:58pm
Hi Justin,
Dropping in a question you've received over on twitter:
Hi! Nope, this report doesn't test SD card size or any other parameters like read/write speed or brand.
— Tessa Rhinehart (@TessaRhinehart) March 7, 2023
Use of passive acoustic monitoring methods to estimate poaching pressure of European turtle doves in Greece (Ionian Islands)
24 February 2023 12:54pm
The Arbimon newsletter is back!
23 February 2023 11:34pm
New guidance - Good practice for ecoacoustic monitoring
23 February 2023 10:31am
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
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
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.
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
28 March 2023 9:37pm
Have you considered Arduinos?