All Questions
454
questions
5
votes
2
answers
98
views
How to convert relative db to db SPL knowing microphone specifications?
Similarly to this discussion (Is it common to have a negative-positive dB range in underwater spectrograms?), I used the 'seewave' R package to plot the below spectrograms.
I limited the coloured ...
- 53
1
vote
1
answer
19
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?
2
votes
1
answer
30
views
How do I use BirdNet without getting an error?
BirdNet is very new to me and I can't really find a guide online. I've installed it, and I've done the 'pip3 install pywebview gradio' to use the GUI version. Every time I've uploaded a recording and ...
- 23
2
votes
2
answers
58
views
How can I measure indisctict temporal(Pulse duration) properties of call?
I'm in my very first year of master's course and bioacoustic studies. My topic is the temporal/spectral structure of Rain call in Treefrog, which is poorly investigated for its function worldwide. ...
- 21
3
votes
2
answers
44
views
Modeling PTS and TTS Distances for Pile Driving?
I was just wondering if anyone has any suggestions on how to find the auditory Permanent Threshold Shift (PTS) and Temporary Threshold Shift (TTS) ranges for Right whales.
I know the source level for ...
- 31
3
votes
3
answers
54
views
Resources/courses for large PAM dataset- porpoises
I am working on extracting porpoise clicks from a multi-year dataset from the northeast pacific using PAMGuard's click detector. I am new to the software and have come across issues in detection using ...
- 31
1
vote
1
answer
24
views
What kind of cheap ultrasound speaker would you recommend for basic playback tests?
I'd like to test the sound response of some rodents to ultrasounds (~40-100 kHz), but my recording/playback devices (microphone, speaker, soundcard) are for human-hearing range.
Regarding speakers, ...
- 4,032
1
vote
1
answer
29
views
Can I use music-related soundcards to record ultrasounds (providing the sampling frequency is high enough)?
I'd like to record rodent ultrasounds (~40-120 kHz) with a soundcard initially made to deal with human-related sounds. The sampling frequency can be adjusted accordingly, however, the microphone/line ...
- 4,032
2
votes
1
answer
26
views
SoundTrap is not appearing in ST Host
I recently plugged in a ST600 into my computer, and it would not show up in ST Host. I followed the instructions (removed the batteries and ST cards) to troubleshoot the issue as outlined in the ...
- 3,618
2
votes
1
answer
32
views
How does cetacean echolocation sound inside a submersible?
To be more specific: assuming an inner and outer hull, with the in-between gap partially serving as a ballast tank, would the transition from water to metal to air/water to metal to air:
a) amplify or ...
- 21
5
votes
3
answers
864
views
If we turn on a TV, is the sound pressure level of the room increased definitely?
I am a computer engineer and I am not an expert in physics. I read about Sound Pressure Level from different references but I can't solve my problem. My question is: if we turn on the TV, is the sound ...
- 51
2
votes
1
answer
41
views
Python Module to Parse 'GUANO' .wav file metadata
Anyone has suggestions for python module to read the GUANO file metadata generated by Wildlife Acoustics Echo Meter Touch application.
https://www.wildlifeacoustics.com/SCHEMA/GUANO.html
Unfortunately,...
- 123
3
votes
1
answer
43
views
What is the bearing's reference point in PAMguard
Maybe a silly question but I haven't found simple obvious answer in the help of PAMGuard.
I am running the click detector on recordings from a two-fixed-hydrophone array simplified on the figure below....
- 51
1
vote
1
answer
35
views
dynaSpec R package is creating an MP4 file with only audio and no video
I am trying to visualize a short recording of an insect, using a WAV file, using the scrolling_spectro command in the R package ...
- 11
4
votes
2
answers
81
views
Advice for capturing duty cycle as a percentage of time sound was recorded
The NOAA NCEI Passive Acoustic Data Archive captures duty cycle information for all our data providers, which span the gamut of continuous recordings to having multiple sampling regimens during the ...
- 401
4
votes
3
answers
75
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 ...
3
votes
1
answer
69
views
The preamplifier in PAMGuard
I'm using a towed array (with two hydrophones and 200m cable) to detect Cetaceans.
We bought from MARINE-ECOSOL. The hydrophone type is Magrec HP03, the DAQ is SAIL DAQ system.
Normally the sounds ...
- 33
4
votes
1
answer
50
views
Low-Frequency (likely baleen whale) Sound from Unknown Source - Oregon coast
Greetings Bioacoustics Community! I am looking for a bit of input regarding a set of low-frequency variable calls that are likely of baleen whale origin. The data were collected in April of 2023 off ...
- 1,147
2
votes
1
answer
23
views
ST600 recording issues - files created but no sounds
We just got two st600s back from the field and the data is really really quiet - it appeared to have recorded but it's almost as if the hydrophone wasn't connected and it's just fuzz. These were brand ...
- 21
3
votes
2
answers
42
views
Thoughts on the acoustic masking impacts of a high amplitude sound that does not overlap in frequency with a signal of interest?
I have a relatively specific thought on acoustic masking, and wanted to know what others think, or if folks know of studies that have addressed this problem.
When studying acoustic masking, we often ...
2
votes
2
answers
33
views
How to export "filtered play" audio only on RavenPro
So I'm using RavenPro to analyse recordings from hydrophones in the indian ocean and trying to export sound clips of humpback whale calls but I wanted to know if there is a way to export filtered ...
3
votes
2
answers
65
views
How to extrapolate time (as hour) per each recording (.wav file) identified in BirdNET?
I deployed some passive acoustic devices to record bird song, and I am using birdNET for the first time. I downloaded the Windows version of the app, set the parameters I preferred and, after running ...
- 33
3
votes
4
answers
107
views
Good definition for "noise"?
Does anybody have a good definition for "noise" that includes all aspects of it?
I vaguely remembered something like :
"noise is a signal that does not contain any relevant information ...
- 1,024
2
votes
0
answers
34
views
How to get rid of duplicated frequency values in Raven Pro?
I use Raven Pro for my sound analysis, and I wanted to measure the peak frequency of the syllables that I selected. You probably know that, the measurements are automatic, I select the measurements ...
2
votes
1
answer
24
views
Replace Hydrophones on ST500?
We have 2 x ST500s with hydrophone issues. One recorded static on a 4-month deployment (heartbreaking) and the other had a bite taken out of it (made for a good recording).
I'm wondering whether it's ...
- 21
2
votes
0
answers
24
views
Bioacoustics STEM Education Survey
I am a masters student in CWU's Primate Behavior & Ecology program. I am interested in Bioacoustics and STEM education. I've noticed there can be quite a learning curve for undergraduates who are ...
1
vote
1
answer
25
views
Infer active space distance based on SNR or SPL measured at 2 distances
I did a sound degradation experiment in which I played model sounds from a speaker and the re-recorded at 4 distances (1, 35, 60 and 100m). I would like to estimate the distance in which sound ...
- 1,058
3
votes
1
answer
46
views
Help identifying the species or group for this ultrasonic vocalization (a rat?)
I am reviewing some audio recorded with an Audiomoth a couple of weeks ago in Bolivia (south America). The target group was bats, but I found these vocalizations which are unlikely for a bat due to ...
- 95
4
votes
1
answer
51
views
Retrieving audio information of multiple wav files in r
I would like to ask if I could retrieve information, such as sample rate, bit rate, length of file, and stereo/mono layout, from multiple .wav files at a time in R, from a file list for example? Most ...
- 41
2
votes
1
answer
53
views
How to parametrize PAMGuard to avoid great bearing inaccuracies all along a recording
I am running PAMGuard click detector on a two hydrophone array's recording to detect sperm whales clicks and calculate their bearing. The array is at a roughly 2300m depth, 40m above ocean's floor, ...
- 51
2
votes
1
answer
62
views
How to preserve amplitude scale from original .wav audio file to output .wav file in seewave and tuneR packages after filtering
I am currently working on a project where I would like to read in an audio file, apply a butterworth filter, and then export the filtered audio file while preserving the scale of the amplitude from ...
2
votes
1
answer
60
views
Error using lts() from R package seewave
I am dealing with an unusual error in trying to create long-term spectral averages with the lts() function from R package seewave. I have a 1 h long time series made up of audio files of 5 minutes ...
- 141
3
votes
1
answer
54
views
How to decode .dat files obtained from SonoTrack?
Disclaimer: I have advanced knowledge of Python, R, and Matlab, so we can skip the basics (such as how to load a file into a programing environment).
The quest is to somehow decode data from .dat ...
4
votes
1
answer
53
views
What are folks doing with extra microSD card adapters?
With the amount of ST600 deployments we do, I order a lot of microSD cards. Every time they come with an adapter, which I do not need more than 2 or 3 on hand. I have a dedicated microSD card case to ...
- 3,618
1
vote
2
answers
42
views
Can F0 parameters be interpreted in atonal calls?
In our study, we have chimpanzee pant-grunts. Even if they are atonal calls, Praat manages to automatically extract a F0 for several of them (among other acoustic parameters). We are not sure how ...
- 11
2
votes
1
answer
29
views
dB units of spreading compensated pressure
I would like to present propagation modelling results in dB with spreading effects removed. The spreading is largely cylindrical, so I am plotting $20 \log_{10}\Big(p(r, z) \sqrt{r}\Big)$ instead of $...
- 341
3
votes
1
answer
47
views
How do I produce a wav. file every time I manually select a signal using spectrogram annotation?
I am trying to extract wav. files every time I manually select a signal using the Spectrogram Annotation Module in PAMGuard . The only way I have found to do this automatically is by using the clip ...
3
votes
1
answer
46
views
How to regenerate Data Map in Pamguard Viewer
When a database is opened for the first time in Pamguard Viewer Mode, it usually prompts for you to specify the resolution of the datamap. The default is 600 seconds. To be more specific, in my case I ...
- 3,443
2
votes
0
answers
30
views
Marantz PMD660 stuck on loading
My trusted Marantz PMD660 Solid state recorder recently developed a fault during a field trip in which it gets stuck on "Loading" when turned on with a CF Card inside. It starts fine without ...
- 21
6
votes
3
answers
62
views
Could conspecific playback stimuli improve detection rate and population estimates in acoustic monitoring?
I am developing a framework for the use of conspecific playbacks to elicit a response in frogs for passive acoustic monitoring. If playbacks were successful in eliciting a response, could this ...
- 61
2
votes
0
answers
111
views
Why are gorilla chest beats so high-pitched?
I am surprised by the relatively high pitch of Gorilla chest drumming (listen here), which peak frequency ranges between 0.6-0.7 Hz. Actually, they sound like human-cheek drumming (listen here)!!
When ...
- 4,032
3
votes
1
answer
45
views
Acoustic Complexity Index total is the same for every file
I'm calculating Acoustic Complexity Index (ACI) for each 30 minute audio file. However each file total is always the same. "30.179" for max freq set at 500 Hz, "34.86996" for max ...
- 31
4
votes
2
answers
49
views
ST600 Rechargable batteries problems
Our RA in the field is deploying Soundtrap ST600s with the recommended Panasonic 18650 batteries that Ocean Instruments recommends (not easy to get hold of). She has charged the batteries fully, but ...
4
votes
2
answers
132
views
Recommended Setup to record Tree Sounds
Question:
What would be your recommended Microphone / Interface Setup ?
Task:
Hello everyone, i am curious about a technical setup to record Xylem tubes and water cavitating inside trees. the idea was ...
- 41
3
votes
1
answer
48
views
SoundTrap 300HF Download Problem
We have had problems downloading several ST300HFs. Specifically, 7/10 hydrophones have the same problem, one of which was deployed in a different area and uploaded onto a different computer.
The ...
- 81
3
votes
3
answers
113
views
Parabolic Microphones?
I'm doing some field recording but we're not able to get super close to what we're looking to record. I figured a parabolic mic might be the move, but they all seem really expensive, and our budget is ...
- 251
3
votes
2
answers
36
views
How do I format the EVO 256GB SD cards using the SoundTrap ST600 software (version 4 up)
First time user of the SoundTrap Host (version 4.0.13.25535) here. When I insert the EVO 256GB SD card using a card reader, there's no PC prompt warning (which means it is formatted to PC style I ...
- 31
4
votes
1
answer
81
views
Why is none of my Whistle and Moans detector data showing up in PAMGuard Viewer Mode?
Background: I'm working on a project using PAMGuard's Whistle and Moan Detector to find killer whale stereotyped calls in recordings from a SoundTrap hydrophone. I'm currently trying to figure out how ...
- 209
4
votes
2
answers
108
views
Detection and removing of windy events in wild acoustic recordings
I have to clean my dataset of recordings concerning an African penguin colony inhabits the South African coast. In particular, since I have recordings with days of strong wind with clipped/noisy ...
- 41
5
votes
3
answers
2k
views
Are there any advantages to collecting data at a sampling rate higher than a recording device can physically record?
Background:
As an example, the Swift recording device can record at a sampling rate up to 96 kHz (with a corresponding effective rate of 48 kHz). However, the highest frequency response that the ...
- 221