4.0 | vanaf 2.18 min | Edwin Houwertjes | Edwin Houwertjes presenteert in een kort filmpje zijn, samen met Cor Berrevoets ontwikkelde ‘open source’ zelfbouw vleermuisdetector/recorder ontwikkeld op basis van een Teensy 3.6 developmentboard die ook spectrogrammen weergeeft van de geluiden die je ontvangt. Deze geluiden worden hoorbaar gemaakt in Heterodyne, Auto Heterodyne, Time expansion. Met het toestel kan je op een hoge samplerate opnemen en kun je hem gebruiken als logger, dus automatisch opnemen (in WAV-file) als er een ultrasoon geluid wordt gedetecteerd. |
4.1 | vanaf 11.44 min | Johann Prescher & Dirk O | Grootoorvleermuizen leggen grote afstand af door coulissenlandschap om in moeras te foerageren.'
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4.2 | vanaf 52.18 min | Marc van der Sijpe | Marc van der Sijpe en Claire Hermans : 'Introductie in auto-recording en auto-identificatie en Explaination how works Tadarida and the BTO classifier of Tadarida'
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4.3 | vanaf 1h41min18sec | Claire Hermans | project: 'Light on landscape' waarbij ze vertelt over de werking van Microphone-arrays om vliegpaden van vleermuizen te reconstrueren. |
This toolbox was initially developed to support the French bat monitoring scheme “Vigie-Chiro” launched in 2006 [9]. Like other PAM schemes during this period, Vigie-Chiro experienced an exponential increase in recording data. In addition, a large volume of acoustic data has been recorded for other taxa without being identified, especially for bush-crickets which did not benefit from any monitoring scheme [10, 11].
Until now, all available software for bat automatic identification were commercial and based on a very specific sound event detection process that prevented efficient bush-cricket detection. Tadarida development focused on detecting every sound event, even if they are structurally very different (e.g. bats and bush-crickets) and overlapping in time or frequency.
https://drive.google.com/drive/u/1/folders/1NRtWXN9gGVnbPbqapPHgUCFOQDGjEV1q
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https://forum.pjrc.com/threads/38988-Bat-detector
https://forum.pjrc.com/threads/38988-Bat-detector/page25
PJRC is the fabrikant van de moederboard
54.4 Vleermuizen VLEN Avond Lezingen
Van oudere vrouwelijke anaconda's is bekend dat ze niet terugdeinzen om de kleinere mannetjes op te eten. Er zijn verschillende waarnemingen bekend waarbij een zojuist bevrucht vrouwtje het mannetje verslindt.
https://www.nlbif.nl/bat-sounds-on-xeno-canto-gbif/ On www.xeno-canto.org a large and diverse community, with professional ornithologists and sound recordists as well as “citizen scientists” and casual observers have brought together a truly global reference database of bird sounds, with over 660.000 sound recordings of more than 10.000 bird species. Over the years the website has become an indispensable tool for everyone interested in bird song worldwide. As an example a Google Scholar search turns up 3260 results (November 1st 2021). The collection is housed on a stable institutional IT infrastructure in the Netherlands maintained by the Dutch GBIF partner Naturalis Biodiversity Center.
Communities of bat researchers and enthusiasts have steadily grown worldwide. Recently, research involving passive acoustic monitoring has surged. In fact a large portion of bat species are rarely sampled using other methods. Accessible, high-quality call libraries for bats sounds are vital for the field to progress. Currently no repository similar to Xeno-canto for bat sounds exists. For example on April 1st 2021 GBIF referred to 490 bat sounds, mostly from Europe and North America. With a larger number of bat species and recordings openly accessible on Xeno-canto, it will be possible to better train algorithms used for automatic species recognition. This will greatly improve our ability to generate baseline information on species diversity for many yet unexplored sites, but also to more effectively monitor bat species or sites of conservation interest. In addition, open access to bat vocalizations will stimulate research at larger geographical, temporal and evolutionary scales.
This project will result in a stable repository for bat sounds (Chiroptera) as an expansion of the Xeno-canto collection on www.xeno-canto.org of bird (Aves) and grasshopper (Orthoptera) sounds. The sounds and metadata will be shared through GBIF and are also available through an API.
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Bats orthoptera sounds on Xeno Canto GBIF
https://www.nlbif.nl/bat-sounds-on-xeno-canto-gbif/ On www.xeno-canto.org a large and diverse community, with professional ornithologists and sound recordists as well as “citizen scientists” and casual observers have brought together a truly global reference database of bird sounds, with over 660.000 sound recordings of more than 10.000 bird species. Over the years the website has become an indispensable tool for everyone interested in bird song worldwide. As an example a Google Scholar search turns up 3260 results (November 1st 2021). The collection is housed on a stable institutional IT infrastructure in the Netherlands maintained by the Dutch GBIF partner Naturalis Biodiversity Center.
Communities of bat researchers and enthusiasts have steadily grown worldwide. Recently, research involving passive acoustic monitoring has surged. In fact a large portion of bat species are rarely sampled using other methods. Accessible, high-quality call libraries for bats sounds are vital for the field to progress. Currently no repository similar to Xeno-canto for bat sounds exists. For example on April 1st 2021 GBIF referred to 490 bat sounds, mostly from Europe and North America. With a larger number of bat species and recordings openly accessible on Xeno-canto, it will be possible to better train algorithms used for automatic species recognition. This will greatly improve our ability to generate baseline information on species diversity for many yet unexplored sites, but also to more effectively monitor bat species or sites of conservation interest. In addition, open access to bat vocalizations will stimulate research at larger geographical, temporal and evolutionary scales.
This project will result in a stable repository for bat sounds (Chiroptera) as an expansion of the Xeno-canto collection on www.xeno-canto.org of bird (Aves) and grasshopper (Orthoptera) sounds. The sounds and metadata will be shared through GBIF and are also available through an API.
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