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Scrolling spectrogram with high resolution video or…

I’m looking for a way to review very high resolution video alongside a scrolling spectrogram of the associated audio track. Some DAWs that have spectrograms (Adobe Audition,Reaper) allow for ...
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  • 41
6 votes
2 answers
28 views

Duty Cycling on FPOD

I am attempting to program an FPODs software to record periodically at 1 min out of 2, but when we save the specific settings file "F_SETS.txt", the POD doesn't read it automatically (as I ...
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  • 61
10 votes
0 answers
31 views

Tools to visualize and compare species detections in long-term recordings

I am looking for a tool to visualize detections (species of choice) in long-term recordings (e.g. over month, over year). I have manual annotations of many files produced in Raven Pro. Raven selection ...
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9 votes
2 answers
51 views

Using animal sounds to inspire conservation efforts in the public? A useful example

Building off of this question on bioacoustics in art media, how can we effectively work with more creatives to help inspire conservation? Music producer So Wylie had a bit of a viral moment when she ...
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  • 3,178
3 votes
1 answer
28 views

What is the threshold to distinguish a birdsong dialect?

I was wondering how researchers are able to establish that a geographic song variation in terrestrial birds is actually a song dialect. What is the threshold of acoustic indices which could identify ...
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4 votes
1 answer
25 views
+50

How best to attach piezzo sensors to a leaf to measure vibration?

I'd like to measure with a cheap piezoelectric disk the vibration signals sent by whiteflies when resting on leaves. These disks are usually pretty big (I have not found any less 2cm diameter) and ...
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  • 3,131
1 vote
0 answers
18 views

Recording of whitefly vibrations: "piezo" versus "low-noise microphone with subtrate-air diffusion"

Whiteflies communicate before and during mating through abdomen oscillations which vibrations are believed to propagate mostly in the leaf (~100-400 Hz). They are very low-energy signals which are ...
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  • 3,131
5 votes
1 answer
48 views

Data augmentation in bioacoustics: pros and cons?

Even though we already have a discussion regarding what kind of data augmentation makes sense for ML in bioacoustics (Data augmentation strategies for bioacoustics machine learning), i believe it ...
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  • 191
8 votes
4 answers
63 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 ...
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  • 191
9 votes
3 answers
125 views

How do industry jobs differ from academic jobs in bioacoustics?

I'm a fresh graduate with a BS Biology degree and so I'm more familiar with the academia side (i.e. how to do research, collect data, write papers, and present them). I keep hearing discussions on ...
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4 votes
2 answers
37 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 ...
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10 votes
1 answer
36 views

Data Standards for Bioacoustics: Is there a GBIF for Bioacoustics?

GBIF, the Global Biodiversity Information Facility, is: an international network and data infrastructure funded by the world's governments and aimed at providing anyone, anywhere, open access to data ...
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  • 3,032
4 votes
2 answers
34 views

Is there any sound repelent/attractant to help rescuing a Beluga who got lost in a river far from the sea?

I've seen in the news that a live Beluga whale has been identified in a French river (Seine, very busy and polluted, >150 km from the sea), which is particularly rare as no Beluga has been seen ...
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  • 3,131
6 votes
2 answers
52 views

Very slow creation of LTSAs from 10-min wav files using Triton

I am generated LTSAs (long-term spectral averages) using program Triton. I have done this lots in the past, but for my most recent dataset, the LTSA creation is taking WAY longer than ever before... ...
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  • 2,816
5 votes
1 answer
97 views

Date ticked LTSA using PAMGuard binaries from duty cycled soundtrap data

I am trying to produce an LTSA of a 3 week period of data from 2018 and the same period in 2020. My 2018 data was collected using a SoundTrap on a 10 min on/10 min off duty cycle. I have processed the ...
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  • 545
8 votes
1 answer
81 views

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 ...
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  • 3,178
8 votes
1 answer
47 views

How to measure long-term dataset for soundscape AND impulsivity?

I have years of passive acoustic monitoring data collected on several full-bandwidth underwater noise recorders around windfarms. Given the volume of the data, I need to automate the analysis, and am ...
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  • 3,009
8 votes
1 answer
39 views

Echosounder setting off automated whistle detector in PAMGuard - Help!

I have underwater acoustic recordings and am interested in marking out dolphin whistles. I am currently having to manually remove an echosounder (which has a bit of a sweep to it), as I do not want my ...
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  • 3,009
5 votes
1 answer
34 views

What are the differences in selection table data in Raven Pro versus Raven Lite when labeling vocalizations?

For the purposes of creating a library of labeled vocalizations for suite of species to use in a machine learning algorithm - is there a difference in using Raven Lite versus Raven Pro in terms of the ...
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5 votes
1 answer
34 views

How does biotremology identify with bioacoustics?

I am wondering how much biotremology (vibrational communication) differs from bioacoutics (e.g. sister disciplice or sub-branch). From what I understood (Biotremology (2016), What is Biotremology? (...
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  • 3,131
10 votes
2 answers
707 views

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 ...
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  • 3,178
7 votes
2 answers
47 views

What are the mentorship awards available in acoustics / bioacoustics / ocean acoustics?

My PhD supervisor was a phenomenal mentor and I would really like him to be recognized for it. I nominated him for the David T Blackstock Mentorship Award from the Acoustical Society of America but ...
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7 votes
1 answer
68 views

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). ...
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  • 3,131
20 votes
4 answers
92 views

Comparison of Soundscape metrics from different software?

There are a number of software packages available for describing soundscape and differing views on which approach is 'best' (see this thread), and there have been attempts at developing standards for ...
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  • 3,032
10 votes
2 answers
316 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? ...
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5 votes
1 answer
61 views

Best practice for measuring amplitude of biophony

It is often useful to quantitatively measure (or at least estimate) the amplitude of an acoustic event such as a bird song. The desired measurement could be, for instance, that a bird sang at 105 dB ...
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  • 171
8 votes
1 answer
92 views

How applicable are kurtosis-corrections for noise impact assessments across marine mammal functional hearing groups?

I've recently heard a lot of people talk about kurtosis (a measure of signal 'peakiness') in the context of assessing the impacts of noise exposure. (The higher the kurtosis score, the more the signal ...
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  • 3,009
11 votes
2 answers
378 views

What is the purpose of overlapping windows in acoustic signal processing?

When reading the methods sections of bioacoustics papers, I often see a window length and % overlap reported in the description of how the spectral analysis was done. What is the purpose of this? ...
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  • 3,009
5 votes
1 answer
33 views

How can you incorporate the hydrophone calibration in Avisoft?

I am stuck in being able to calibrate the avisoft. I have a soundtrap Hf300 and I'm not sure how to insert the data into the avisoft calibration. Any advice? Thanks All the best
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18 votes
4 answers
2k views

Can you have SoundTrap recorders as carry-on luggage in a plane?

I will be travelling in the field by plane with a SoundTrap recorder and its hydrophone. It will be an international flight (USA to Canada) with Air Canada. I am planning to take this as a carry on ...
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6 votes
1 answer
69 views

Resources specific to bioacoustics fieldwork in terrestrial settings

I'm a practitioner who has come into bioacoustics from a non-ecology background, as my practice up to 2020 was largely confined to sound art, field recording and holistic aspects of acoustic ecology. ...
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6 votes
5 answers
522 views

What Autonomous Recording Units (ARU) allow on-board compression?

In an attempt to spare storage, I'm interested in reducing the size of continuous recordings of soundscapes. Are there some Autonomous Recording Units that are able to do this on-board? More ...
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7 votes
1 answer
66 views

How to handle leap seconds? UTC or GPS timestamps for data management?

A while ago we decided to use UTC timestamps for our data management of under water acoustic recordings. UTC time is convenient because you can combine it with drone recordings, photo cameras and even ...
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4 votes
1 answer
32 views

Many time Hydrophone recording consist of Chain noise at regular interval. How to minimize this unintended sounds?

I was analyzing some marine data from the Red sea. I found some sound structures which didn't look like any biophony. When I listen to this sound, it looked like some chain noise. since I didn't have ...
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8 votes
1 answer
67 views

Mystery Marine Animal Sound off Georgia USA in Western Atlantic

I am trying to learn the source of the sound in the spectrogram below. It has been recorded in early to late winter (January/February) on the shelf (25 m depth) off the US state of Georgia in the ...
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  • 396
6 votes
1 answer
59 views

Low cost hydrophones for quantitative sound pressure measurements?

Has anyone experience with using low-cost hydrophones, for example the Acquarian Audio H2a, and use a calibration measurements, for example by comparing to a Brüel Kjaer 8106, to get quantitative ...
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5 votes
1 answer
92 views

Which software can read bwf file cue chunk data and present it in an easily accessible format, such as a .txt file?

'Whispering bats' are bat species that either use low volume echo location calls or use passive hearing for prey detection, so producing no echo location calls at all. Detecting and identifying ...
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15 votes
3 answers
98 views

Acoustic Recording File Description and Annotation Standards - What Exists? What Should Exist?

I am hoping to compile a list of existing standards or recommended approaches for describing acoustic files, including any notable strengths or weaknesses with the systems. My team has access to large ...
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6 votes
3 answers
158 views

Alternative to tuneR::readWave function in R?

tuneR's readWave function is good and works pretty quickly for loading audio recordings into R. But I was wondering if there are any alternative functions for loading .wav files? And if so, are ...
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16 votes
6 answers
1k views

How to reduce the unwanted wave noise in Hydrophone recordings?

Many times hydrophone recording contains unwanted noise like 'wave noise'. How to deal with this noise at the source? Is there any way to deal with this in the analysis stage? as abrupt noise impacts ...
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14 votes
5 answers
686 views

What animals can be individually identified through their vocalisations? And to what extent?

Like humans, many animals have unique voices through which we can identify them individually. This information is beneficial in non-invasive tracking, population/density estimation and much more. But ...
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14 votes
1 answer
61 views

safety protocol for working with flooded housing with lithium batteries

As noted by others here, there have been occasions where recorder housings flood, and this can lead to damage to the lithium batteries. We are looking to develop safety protocol in case this happens ...
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  • 3,032
7 votes
2 answers
159 views

What amplitude do you use for playbacks?

When performing playback experiments with birds, is there a biologically relevant source level for song playbacks? I have read that a standard value is 90 dB @ 1 m, however I could not find a good ...
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  • 602
4 votes
1 answer
63 views

Can I convert dB(A) into dB?

Suppose I have a recorded sound, from which I can calculate a power spectrum, along with the Received Level of that sound measured in dB(A). Is there a realistic way to back-calculate the non-weighted ...
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  • 602
10 votes
2 answers
577 views

Should we normalize audio before training a ML model

In computer vision it seems that image normalization is very important to keep the gradients "in check" (detailed description here). However, I was wondering if it was also the case in audio ...
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3 votes
0 answers
29 views

Equipment recommendation for sound source localisation

Do you have any recommendation for multichannel equipment for source localization? What parameters should I consider for the microphones, for the recorder? Also any advice for starting multichannel ...
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15 votes
3 answers
167 views

What soundscape visualizations are useful for assessing biodiversity over long time periods (>1 year)

I'm interested in effective methods to visualize and subsequently analyze long-term acoustic datasets, including those from disparate datasets. Are there preferred color schemes that work well for ...
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14 votes
3 answers
85 views

How to evaluate changing sensitivity of a recorder over time?

In discussions with colleagues I've learned that the sensitivity of a recorder can vary over the duration of a deployment. I'm not sure why or how this happens, but how can you evaluate if it has ...
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  • 1,536
8 votes
1 answer
47 views

What contributes to differences in click structure for populations of the same species?

I am examining the case of Pacific White-sided Dolphins as an example. Reading Melissa Soldvevilla's 2017 paper sparked my interest in this topic. In the paper, 'Geographic variation in Risso’s ...
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12 votes
2 answers
109 views

Bioacoustics lab start-up recommendations [closed]

Something that isn’t really talked about or taught along the way to a Phd, is how to put together a lab wishlist when starting a new (academic) lab. It’s likely more difficult the more specialized the ...
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