Questions tagged [pam]

Questions related to Passive Acoustic Monitoring of animals, by stationary recorders, recorders towed behind ships, or deployed on gliders or other moving platforms. Covers both practical issues of hardware and deployment and analysis of recordings. Does not apply to measurements on animal-borne recorders, as those should be covered by the [tag:biologging] tag.

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3 votes
2 answers
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How to convert stereo audio files to mono?

I have multiple stereo .wav recordings which I want to convert into mono files for further analysis. Is there a way in RavenPro/R/Audacity to batch convert them to mono sound files (channel 1 or ...
indobatrachus's user avatar
3 votes
1 answer
38 views

Does anyone know if there's a PAM data library for prawn/shrimp behavioural noises?

First stack exchange post ever, please excuse any breach of convention. Has anyone seen any PAM libraries containing noises from prawn (Penaeus Monodon specifically) or shrimps?
A Learning Prawn's user avatar
4 votes
3 answers
82 views

Very high frequency sounds in Northern France

community, We have in the North of France several recordings full of very high frequencies dolphin types sounds (like clicks, whistles, calls?, burst pulses. etc...) with almost all frequencies above ...
Marjolaine Caillat's user avatar
2 votes
1 answer
42 views

Rechargeable batteries for Song Meter mini

Looking for any recommendations on high quality rechargeable batteries that can be used in Song Meter minis? Looking for rechargeable batteries to last up to 10 days on 12 hour continuous recording ...
Jess Leaver's user avatar
8 votes
1 answer
277 views

What options are there for micro audio recorders?

I'm in the process of purchasing gear for this upcoming field season and am looking for audio recorder recommendations. I'm hoping to place ~30 small recorders in seabird rock crevices to record ...
Katrina W's user avatar
  • 143
5 votes
1 answer
430 views

Song Meter vs AudioMoth PAM performance

I'm assembling a PAM field kit for the upcoming breeding season in the temperate rainforest ecoregion of Washington, USA, and would love to learn about your experiences with different ARU (Autonomous ...
giojacuzzi's user avatar
7 votes
3 answers
198 views

Improving whistle detection rates in PAMGuard

I'm new to PAMGuard and have been trying to use it to detect whistles (of common & Atlantic white-sided dolphins) and I've been having issues with detection accuracy. I'm running the whistle and ...
Maia D'Souza's user avatar
4 votes
0 answers
35 views

Using Kaleidoscope Pro for delphinid whistle detection- how to improve detection rates?

We have 6+ years of continuous underwater recordings, in which we are currently trying to quantify whistle counts/activity. I have been trying to use Kaleidoscope Pro for whistle detection with signal ...
Maia D'Souza's user avatar
9 votes
3 answers
140 views

SoundTrap ST600 click detector for delphinids and porpoises

We are deploying a number of SoundTrap ST600s and are currently trying to determine the best parameters for the click detector. We are most likely to encounter Harbour Porpoise and Bottlenose Dolphins,...
EmmaL's user avatar
  • 737
5 votes
2 answers
117 views

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 ...
Yael Lehnardt's user avatar
9 votes
4 answers
103 views

What are the longest-running wireless PAM surveys to date?

Most published studies in wireless passive acoustic monitoring (PAM) report an audio acquisition duration that is relatively short, from a few hours to a few months. That's what one would get by ...
lostanlen's user avatar
  • 393
6 votes
2 answers
53 views

Requesting your feedback on ideas regarding the utility of PAM devices

I am a master's student working on mixed-species bird flocks in the eastern Himalayan tropical forests. For some administrative and interpersonal reasons, our lab has ended up with a bunch (~25) of ...
akshay_birdwatch's user avatar
14 votes
2 answers
675 views

What is the difference Between Active Acoustics Monitoring (AAM) and Passive Acoustics Monitoring (PAM)?

Detection of animals through the bioacoustics method has been popularised lately. The key terms that we heard in bioacoustics research are PAM and AAM. What is the difference between PAM and AAM? ...
Sougata Sadhukhan's user avatar
9 votes
1 answer
62 views

What happens when PAMGuard freezes (due to memory issues) while creating an LTSA?

I'm using PAMGuard to process some recordings and I keep having an issue where it is freezing. I'm trying to create an LTSA at the same time as using the GPL detector (for blue whale A/B calls). I ...
Cory Hom-Weaver's user avatar
17 votes
3 answers
131 views

Harbour porpoise click detection using deep learning

Harbour porpoises produce distinct narrow band high frequency clicks centered around 130 kHz. Typically these are usually easy to identify by a manual analyst and should be relatively easy to ...
user avatar
8 votes
1 answer
209 views

Apple M1/M2 chips for acoustic deep learning

I’ve been reading that both Tensorflow and Pytorch deep learning frameworks are now supported by Apple M1/M2 chips. This means that a deep learning acoustic species classifier should run an order of ...
user avatar
11 votes
3 answers
59 views

Existing research on using passive acoustics to monitor Pika or other small, vocal mammals?

I'm interested in using passive acoustics to monitor for the presence of pika (Ochotona spp.). I have found very few publications that consider pika vocalizations (none in the last decade), and none ...
KMerkens's user avatar
  • 221
11 votes
1 answer
69 views

Can someone recommend hardware to generate ultrasound on underwater recording rig?

I would like to construct a simple system for automatic playback of ultrasound signals at low levels for calibration purposes on an underwater recording rig. Can anyone point to a suitable DAC (...
user avatar
10 votes
5 answers
74 views

Where do you put a terrestrial recorder if you have no freestanding structures to attach it to, and also can't put a stake in the ground?

I have a terrestrial acoustic monitoring situation that presents two challenges: Acoustic monitoring is being conducted in an area with limited options for attaching the units (i.e., very few ...
Cathleen B's user avatar
  • 1,024
3 votes
1 answer
116 views

Determination of position of a vocalizing animal [closed]

I am interested in passive acoustic monitoring of bird in difficult to access terrain. But then I want to know if sensors can determine the exact position of vocalising birds
Dickson Anoibi Matthew's user avatar
9 votes
1 answer
92 views

Calculate noise exceedance levels - passive acoustic monitoring

I am trying to describe the acoustic environment at a nature reserve based on continuous passive acoustic monitoring. I am using calibrated SM4 (Wildlife acoustics). KaleidoscopePro does provide batch ...
Yael Lehnardt's user avatar
7 votes
1 answer
49 views

What are the limitation of Density Estimation in Passive-Acoustics Monitoring?

Passive acoustics monitoring (PAM) is a fast-growing ecological field. The data is very useful for monitoring animal presence/absence and studying their vocal behaviour. There are several limitations ...
Sougata Sadhukhan's user avatar
7 votes
3 answers
241 views

What are the automated bat identification (acoustics) tools available?

Bat acoustics research started as early as the 1970s. Many researchers and manufacturers have developed automated bat detectors. These tools are effective ways to assess an ecological system. ...
Sougata Sadhukhan's user avatar
14 votes
1 answer
54 views

Method for assessing false negatives for rare sounds in long-term PAM dataset

Hi fellow bioacousticians, I am working on a needle-in-a-haystack detection problem and am trying to figure out the best way to assess the rate of false negatives. My goal is to detect gunshots in ...
Ben Gottesman's user avatar
9 votes
3 answers
115 views

How do I detect 50kHz echsounder in PAMGuard

I have collected a large (~10TB) dataset using SoundTraps recording at 576kHz to investigate harbour porpoise foraging behaviour around fishing nets. I processed the data using PAMGuard's click ...
user avatar
9 votes
2 answers
97 views

What are the tools available for freshwater acoustic monitoring?

Recording in freshwater is getting more popular and people usually use a handheld recorder and hydrophone for focal recordings. How about passive acoustic monitoring? There used to be a possibility to ...
Cam Desjonqu's user avatar
12 votes
2 answers
114 views

Which methods /software/scripts can be used to time-align recordings from an acoustic array?

In the past, I used Osprey and I am aware of the script by Malinka et al., 2020. What other methods/scripts/software folks have used and would recommend? Here's some background on the dataset: I have ...
Julia Dombroski's user avatar