Bioacoustics - Science topic
Bioacoustics refers to the investigation of sound production, dispersion through elastic media, and reception in animals, including humans. This involves neurophysiological and anatomical basis of sound production and detection, and relation of acoustic signals to the medium they disperse through. The findings give us some evidence about the evolution of acoustic mechanisms, and from that, the evolution of animals that employ them.
Questions related to Bioacoustics
The attachments are 5 bat calls, recorded via Anabat detector, from Umluj, Tabuk Province, Kingdom of Saudi Arabia.
I analyzed them using Anabat Insight's BatClassify Plugin. On analysis, four of them are classified as Pip (precision >95% in all four cases), which means they belong to the genus Pipistrelle. However, only one out of the five recordings is classified as [NSL (96%) (1); Bbar (62%) (2)]. It is not clear as to which genera out of the Noctule, Serotine or Leisler’s they belong to. The fact that Barbastelle is not reported from this part of the globe makes it even more intriguing. Moreover, the plugin pertains to species from the UK only and therefore, I need to confirm from experts. I shall be grateful if someone working on this aspect of ecology can confirm the genera and, if possible, the species from the files attached.
Thanking in anticipation
There are some interesting challenges for DAS systems in fields of agri-biophotonics and/or biophotonics - from vibration impact studies on the roots of growing plants to sea fauna acoustics monitoring, but researchers usually prefer array of single sensors or quasi-distributed sensors. Or maybe you know the examples with the DAS application? Thank you!
I am searching for good recordings of distress calls emitted by American crocodiles, in particular by hatchlings. The longer the better. If not, also distress call recordings of other crocodilian species are fine.
I am using Audacity to analyse the presence of birds and frogs recorded with a SM4 recorder (Wildlife Acoustic). Background noise (rainfall, wind) is an important variable to consider that can affect the detection of some species. What bioacoustic variable can be taken to quantify this noise? The RMS dB is an option.
I have heard of the Plant Spikerbox from Backyard Brains and trying to acquire it. I want to study the electrophysical changes in common plants as Chilli, Tamarind, Papaya, etc due to environmental and human stimuli. But the devices I find are usually very expensive. Is there any DIY way of building such devices? What type of electrodes do I need? What type of wires to connect them to the plant? And what receptors can detect low-frequency electric signals? Also in the case of Plant bioacoustics, What device can I use to detect their ultrasonic sounds?
Hello friends of bioacoustic and birds conservation,
Please does anyone know anything about the effect of acoustic cannons on bird behaviour, breeding ecology etc.? I am looking for a background information about the negative effect of such equipment that is used in wetlands to shoo cormorants. The aim of my interest is to find out if there is a collision between the effort to protect fishes against cormorants by acoustic cannons and the need of general bird protection in wetlands and surrounding landscape. My questions are:
1. Has this shoo activity any negative effect on another bird or generally animal species?
2. Are acoustic cannons effective in long term cormorant frightening?
3. What about habituation on such acoustic disturbance in birds?
4. Dose we have any basic information about the long term effect of non-natural acoustic stimuli on animals especially birds?
5. Are there any effective alternatives how to deter cormorants from feeding in particular fish pond that are not invasive for another species?
Many thanks for your notes.
When some of the call properties show negative correlation with temperature . Is it necessary to perform temperature correction of such properties ? What are the steps involved in the correction.
Platz and forester, 1988 gives the formula D14 = Damb - (Tamb. -14.0) (-0.0974) . Can we apply our desired temperature here (Eg. 20 °C ? Or is there any better way to perform this correction
is there any option in AVISOFT SASLab Pro software which enables you to eliminate unwanted noise from digital recording without effecting your original sound? In my case, sounds are recorded in the experimental tanks with a hydrophone connected to the digital audio recorder. The lab is full of low-frequency noise, which in some proportions, disrupts my sound of interest. If I high-pass filter recording, there is still noise which is not eliminated and it is overlapping with the sound frequency spectra.
Any advise would be helpful.
While working on squirrel calls, I found that the frequency of the sound produced by individuals from mean sea level is quite more than the same from an elevation of about 2000 metres. Does the frequency depends upon the elevation of habitat and changes with change in the height or their is something else behind the aforesaid phenomenon.
I'm currently working on a soundscape ecology study in which the entire acoustic community is of interest. I have been reading up about the Fast Fourier Transform (FFT), and the trade-off between the time and frequency resolution, which is determined by the choice of window length.
I have however failed to find any resources which explain which temporal/frequency resolution is required for the sounds of interest.
I understand that if only one/a few species with known vocalizations are of interest, this choice can be justified easily, but what if you're dealing with an unknown acoustic community? Studies of the acoustic community which use only the audible spectrum (with a sampling rate of 44.1 kHz) often use a frequency resolution of 172 Hz, but don't offer a justification why they chose this. And what if you're also looking at the ultrasonic part of the acoustic community - how would the required frequency resolution change to capture both sonic and ultrasonic signals?
I appreciate any insights you might have.
I'd like to understand what is the typical bandwidth of bioacoustic signals and if they counld bbe revealed from radio satellites
I'm a Dutch student who is working on a project to investigate the possibility of estimating the number of calling Spadefoot toads (Pelobates fuscus) on a recording by using Avisoft SASlab pro. I'm using sound recordings of calling Spadefoot toad's and I'm trying to detect every single call with Avisoft. I have used a Bandpass and Sampling Rate Conversion to filter the recording and focus on the frequencies used by the Spadefoot toad. Thereafter I used the Automatic Parameter Measurements Setup.
Avisoft detects most calls but also misses some and make some false counts. These false negatives en false positives have a lot of impact on the data. For example: I have counted 12 calls on a recording but when I analyse the data with avisoft it counts 24 calls. Is this the disadvantage of using bioacoustics or am I missing something? I hope you have some suggestions for me.
I am researching about the use of bioacoustics for mammal species, and there are quite a bit of studies that use bioacoustics for mammals, but they tend to analyse the data manually. How feasible would it be to carry out machine learning for all 11 primate species in Peru?
According to Gagliano et al 2012 (Towards understanding plant bioacoustics published in Trend in Plant Science, 17: 323-325, 2012) maize seeds emit clics during germination. When recorded and played back these clics can influence the direction of the growth of roots (in aquaculture). The response occurs at a frequence of 200 - 300 Hz.-
Questions: do plants have receptors for sounds? Do we know anything about the signal transduction leading to this phenomenon?
I have used RAVEN software auto detect filters to identify (label) the notes of a single bird species that imitates other birds. Thus I'm working with a large data set (hundreds of thousands of notes within thousands of songs) and am attempting to label all the sounds (notes, syllables, phrases) accurately within the songs of
a bird species and found:
1) it is very time consuming to tweak the parameters to even get it to 'work'
2) when it is 'working' it returns with numerous false positive and negative results
I'm curious if those interested in identifying (labeling) large data sets of animal sounds have found a software that will sift through the spectrograms with accurate identification (labeling) of sounds?
Currently I'm using visual and aural inspection (human) of spectrograms to do this, which amazingly seems to be the only way to achieve accuracy in this task. It's incredibly time-consuming but I appear to be quicker at doing it 'old school' than by using automated (computer based) methods.
M.S., Doctoral candidate in Animal Behavior
University of California, Davis
Hello, I currently work on rainbow lorikeets vocal individuality. The problem is that parrots are very loud and the audio signals are clipping. I use directional mic Senheizer ME 66 and recorder Tascam DR 100 MK III with limiter on. Is there any solution to solve this issue? I know it is possible to fix clipping in audio programs, but is it ok to use fixed signals in my analysis or it is better to eliminate them?
As a bioacoustics researcher I need an operational definition of communication. I have been using Weaver's (1949) definition, in which communication is the process in which one mind affects another. I have recently received some critics by reviewers that questioned the age of such definition. Even though I disagree age to be a factor by which we judge definitions, I reviewed the the theme and did not like any of the new approaches. So I ask, is there any new, better, and operational definition of communication?
Can someone recommend me reliable and reasonably priced speakers for playback experiments in the range of 100-15000Hz?
Unsupervised recognition and classification of bird calls and songs is a target for many researchers, however even simple sound recognizers could be useful.
I'm searching programs able to easily set a "song template" and then search for its occurrences thorough a long series of recordings. I'm willing to compare them and score them according to efficacy, speed and ease of use.
The work is within the themes of bioacoustics and ecoacoustics applied to environmental monitoring.
What are best open source software available for the bioacoustic database management and for the cleaning and cutting of the raw recordings of animal sounds from the field? I have previously used PRAAT and now trying out Luscinia. Any other options out there?
This analysis is part of a bioacoustics study attempting to identify changes in chickadee alarm calls in response to traffic noise. Our main response variable is change in peak frequency, but I am having trouble consistently identifying this using Raven Software. It appears that when we highlight the top and bottom Spectrogram views, the peak frequencies that we identify oftentimes differ.
On a side note, we've noticed that all of our peak frequencies are multiples of 173. I'm fairly sure that this is the default 'frequency bin size' of Raven Software. Can anyone offer an opinion whether this is sufficient resolution for a study comparing peak frequencies of alarm calls? If not, is there a bin size that is more standard/preferable? Thanks!
I am writing my MSc thesis about vocal communication in woolly monkeys and I want to make a general description of their different types of calls. I want to obtain various acoustic parameters such as duration, frequency range, low frequency, high frequency, maximum amplitude, average frequency, initial frequency, and final frequency. Hence, I have to analyse my recordings using SoundRuler, but I've never used this software before. I've read the instructions but I have some questions anyway.
- I recorded in stereo, so when I introduce the recording in the software, it asks me if I want to analyse left or right channel. Can I analyse both separately and then calculate the mean of both channels?
- Also, when I introduce the recording, I mark the section that I want to analyse using green bars. Once this section is marked, I proceed to do the analysis. Is it as easy as clicking the "manual" button? When I do it, it appears a table with the different values of the parameters, but I don't know if it is as "simple" as that.
That's all at the moment. Thank you for your answers!
With what coefficients are corrected each frequency for acoustic waves?
I’m looking for the coefficients which are applied between emitted sound wave and the reception for each frequency
Many thanks in advance
I am studying species-specific hearing ability across taxa in order to better understand the effects of anthropogenic noise on animals. I don't have a background in acoustics or audiology, and I'm looking for something that can get me up to speed on the major structures and differences across all taxa that have ears or other airborne-based-sound hearing structures.
With an affordable rate (good price-quality ratio) please. The main purpose is to record marine mammals sounds and foraging activities at night in coral reef ecosystems but if it would be great if it could also pick up waves breaking for an artistic personal project. It has to be easily handled manualy (for snorkelling). Thank you for all advice.
I was monitoring a lobster and noticed it was clearly resonating through its carapace (just ahead of its tail section in the spot they're easily held). Everything on the web seems to focus on them using their antennae and file, is this a common communication mechanism as well? attached is a snippet where he seemed to "tell me off" before walking back into his mangrove.
I am looking for a way to estimate particle acceleration of an underwater sound produced by aquatic animals, per e.g. Something easy to use in the field and reliable. Like a vector sensor or an underwater geophone?
For detecting vocalizations of beluga from large acoustic recordings data set - used to determine presence/absence of species, so would need to detect both clicks and whistles.
I am looking for a user-friendly software for analysing bioacoustic recordings (underwater sounds) with students. I am so far interested by Raven Pro and Adobe Audition. Any advice? What is your favourite software ?
I'm interested in understanding if is possible and feasible to detect and record underwater sound without touching the water, e.g. with a laser interferometer like those used to record sounds by detecting the vibrations of a surface like a glass window.
I haven't matched the audio up with the file, but I don't think its necessary for the example attached. The gist is that I am using the 1st, 2nd and 3rd derivative to look at a fish vocalization. the 3-D plot on the left shows those data points (based on what I read in the manual). I took a min-max of each series as well and plotted on the right in the stem for each snapshot (its slowed down by about a factor of 10, the signal is about 2.5 seconds long. I think I am looking at a periodic non-linear signal (this makes sense since the fish is basically vocalizing with a set of sin waves so I expect continuous derivatives).
in summary, since each derivative is uniform but mean power is ~=0, the signal is non-linear periodic. if I'm wrong, can you please tell me where?
So far I have some estimates from Lotek, Holohil Systems, and ATS. I would love to hear personal experiences about these and any other company's products.
I'm also curious if anyone has some insight into tracking a species that is known to burrow in mud and how the signal might work...
so I'm no biologist, but I'm trying to get a grasp on some biological elements of the model for a resonant bubble with respect to the swim bladder. if a fish pushes against the bladder with muscles to make a noise, it looks like in some of the biology book pictures that the gas is moved around during vocalization. but the center frequency seems to be pretty constant in the files I look at. so if the fish isn't frequency modulating - but there is still some modulation present - shouldn't the radius factor (usually shown in centimeters) be a function of time, from when the vocalization begins to when it ends?
Bioacoustics is said to analyze several recordings of sound, not only including those produced by animals but by human activity as well. How long of a process is it to analyze all of the sound recordings and assess the soundscape ecology, especially if they are factors that can constantly change the overall soundscape?
I'm interested in attaching a small audio recorder to large mammal radiocollars and having them record continuously for 1 month.
1. Would need to store 750 hours on audio and run on a single charge. Ideally, it would have a sampling frequency of 22kHz (but this isn't essential and battery life trumps sampling frequency).
2. Combined recorder and battery weight < 150 grams
3. Recorder and battery price < $250
Does anyone know of any recorders that fit the bill straight out of the box, or that could be modified by someone with little electronics experience?
A previous study on chipmunks used a spy microphone (http://ts-market.com/products/models/1258/) for their project. That would also work here if there was a way to change the power input to something that would last 1 month (storage on the device is enough for 1200 hours).
Having said that, the unit cost of the above device would probably exceed my budget so if anyone is aware of something cheaper that would be great.
Thanks in advance for your help.
Communication involves multiple individuals (at least a sender and a receiver). On the other hand natural selection will act based on the fitness value of communication for each individual involved in the communication process. In such case, when should selection affect on the receiver, and when will it act on the sender? (edited)
This figure ( result from Hydroacoustic instrument Cruzpro Fishfinder ), What interpretation if you look this figure??
I have a trouble in my research , What's this figure showed no detection ? or processing data wrong ?
And please give your comment and your suggestion ,
Attempting to create an automatic detection algorithm to scan large data sets. I want to pull out beluga vocalizations to determine spatio-temporal habitat use from several years of hydrophone recordings.
I seek advice on dealing with background noise which overlaps in frequency with the signal of interest. The software I use is Avisoft SAS-Lab Pro. I have used an eraser tool (under strict predetermined criteria). Is there a more suitable method in cases where the background noise is of a similar frequency to the signal?
Recordings are made at a sample rate of 48kHz (16-bit) and resampled to 22.05kHz. Spectrogram parameters: 256 FFT, Hamming window, 100% frame size, 50% overlap. Resolution: 86Hz and 2.9ms.
Should i use dBPeak values to determine underwater noise mitigation (i.e., safety zones) instead of dBrms even though the NMFS interim sound thresholds for marine mammals uses dBrms? As thresholds are considered absolute values we should not exceed (e.g., to avoid TTS and PTS), should we monitor for dBPeak values instead of dBrms? This is in relation to impulsive sound rather than continuous sounds.
Whether the Software Raven pro 64 bit 1.5 (Bioacoustics Cornell Lab of Ornithology USA) is able to analyze the spectrum of dolphins with specific?
logarithms, frequency range, and the range of intensity ??
Thank You ,..
As every rotating object creates or emits sound due to its rotational motion, so are the planets. But, do we have any research, where in which we try to figure out how the biological oscillations associated with various parts of our body are related to different sound spectrum emissions from rotating planets? If so, via resonance do they impact the functional qualities?
i have identified six songs on the basis of spectrams analysis in the vocalization of Indian magpie robin . how can i interpret my audio format data for a bioacoutic journal.
I've recently used the calls of male midwife toads played back to a restricted population of the toads in order to assess their overall population size. Has anything like this been done in the past within Europe either with midwife toads or another anuran species?
I'm new to acoustics and trying to describe and analyze loud calls of red langurs. Loud calls of this species has never been studied previously, so there's no reference I can look up to. I need suggestions to determine if: (please see attached image)
- the loud call is tonal or non-tonal (I think they're non-tonal)?
- is there any predefined "names" for the shape of the spectrogram (a, b1, b2)?
- where (on the spectrogram) is the fundamental frequency (F0)?
Any inputs will be very appreciated. Thank you.
I am looking to record prairie dogs vocalizations paired with their behavior continuously in the field, so the device will be exposed to the elements.
This Question has been answered, I appreciate all feedback, thank you!
I would like to study if Vespa velutina in their nests produce a particular sound.
If yes, is this sound detectable from long dinstances? (up to 1 km)
Do there are already studies like this?
I am searching for good song recordings of African Reed Warblers. The longer the better. Or maybe somebody works near the habitat of these birds and it's not a big deal to record several minutes for me :)
There are some recordings on xeno-canto.org, but they are way too short for the analysis :(
It is a stridulatory apparatus which sound has never been heard in the larval stages. On the other hand the sound is audible on the adults. Does anyone has a biological idea or explanation of this phenomenon?
I am currently trying to assess the population size of a non-native species here in England, the midwife toad (Alytes obstetricans). So far I have only found what I think are males (as they call) but I have noticed a difference in the kind of calls that are made by the toads.When I have looked at the calls using sonogram analysis software two different calls are distinguished. I was wondering if one could be from a male and the other from a female.
I have attached a sonogram which shows a short section of one of my recordings. Am I right in thinking that individual A is a male and individual B is a female returning his call?
I study the riches of song complexes (dialects, sub-dialects etc) of Chaffinch (Fringilla coelebs) in Ukraine. But I did not found studies of numerical separation of these complexes and numerical description of their riches.
I am curious about the idea if it is possible that non-echolocating bat species may be affected by extreme noise. Since most of the studies published deals with echolocating species. Thanks in advance!
I am working on avian acoustic adaptations in urban habitats. I use Avisoft SAS LabPro and Raven Pro1.4 software. These software do give amplitude levels of sound but are exceptionally too high in comparison to measurement made by Sound Level Meter SVAN 957. What measurement setting should I do in the software for getting accurate SPL( dB) from the .wav files?
I’m working on an automated frog call detection problem. I’m trying to determine a good way to estimate the number of true negatives within a given sample. The true and false positives, and the false negative are easy, but to perform some of the more sophisticated analyses, one needs a value for the true negatives. True negatives in this context can be defined as the sample space within which the automated classifier could have made an incorrect classification, but did not.
My thought was to sum the time taken up by the true and false positives then add the time taken by the false negatives (determined by multiplying the number of false negatives by the mean time of a true positive). Then subtract that value from the overall time, leaving the time that was “at risk” of incorrect classification. Then divide the remaining time by the mean time of a false negative (with the logic that if it did make a hit, it would have been incorrect) to get the number of true negatives.
The problem with this method is that it does not work when there are lots of calls, frequently the summed time exceeds the recording time, which makes sense. I am going to explore the use of the median, but I was curious if anyone else has gone down this particular path with any degree of success?
I am trying to understand signal evolution in terrestrial mammals in an environment such as neotropical beach (south of Brazil, municipality of Florianópolis,Santa Catarina), humid, saline, windy versus a rural more savana like environment. I know the classical studies of Richards and Willey, Aubin and Jouventin, but I could not find any study relating saline or humidity degrees with signal funtional structure. Any possible help? Any comparison made about bird species living in coastal versus savanna environment?
We (some Czech and Slovak ornithologists) use commercial recorders for owl monitoring (in a weatherproof box placed on the tree).
I am looking for other people who use this method or similar.
I’m recording great tit vocalizations around the nest during breeding. Males can use songs, alarm calls or this kind of call that I am not sure to identify (see the attached files).
I am new to the soundscape analysis field. I am looking for a software that would allow me to analyse different metrics, from the basics (amplitude of a certain frequency band) to the advanced such as counting of specific signals (snapping shrimps snaps and fish vocalizations) and diversity indexes. I have limited experience with R and no experience at all with Matlab but I am willing to invest time in it if it is really worth it.
I usually deal with outdoor noise propagation (noise impact assessments). I use software like Cadna, Soundplan and Predictor. I'm Interested in bioacoustics (I don't do this for a job) I'd like to know if specific software (free and not) exists to study the noise effects on animals. Sometimes reading noise reports that deal with impacts on animals I noticed that usually a dB(A) is used. Is it correct that a human filter scale can study the noise effects on animals?
I'm working with sound emission of Netrosoma (Orthoptera) from Mexico, together with Paolo Fontana. We are trying to understand which body parts are involved in sound emission since some spp are without stridulatory file.
Biomedical use of ultrasonic acoustic waves usually use frequencies in the MHz or sometimes in the kHz ranges. I am working on a project that requires much lower frequencies, and would like to know the experiences of anybody using instruments currently available to produce these low frequencies.
I am trying to categorize burst-pulse sounds of dolphins within a data set, and am having trouble figuring out how to determine the pulse repetition rate of a sound. Raven (Cornell software) does not seem to have any instructions on how to do it in their software, but is this something another software can do? Can you count the number of pulses visually? Do I need a code, for example in Matlab? Any help would be greatly appreciated!
Humans aren’t the only ones who lose their hearing as they grow older. Scientists report that wild Indo-Pacific humpback dolphins (Sousa chinensis), which can live 40-plus years, also have trouble picking up sounds as they age.