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Chemnitz University of Technology Develops New App for Animal Sound Recognition

Chemnitz University of Technology Develops New App for Animal Sound Recognition
Bird calls, such as those of the goldfinches pictured here, and other animal sounds can now be identified using a smartphone app—even without an internet connection. (Archive photo) / Photo: Sebastian Willnow/dpa-Zentralbild/ZB
From: DieSachsen News
From now on, no whistling or grunting in the forest will remain a mystery. A new app for identifying animal sounds uses AI and works without an internet connection.

Chemnitz University of Technology, in collaboration with colleagues from the University of Würzburg and the Bavarian Forest National Park Administration, has developed an app that can identify animal calls directly on a cell phone—without an internet connection. The Birdnet Live app can currently identify 8,927 bird calls as well as the sounds of 268 mammals, 254 insects, and 340 amphibians—in real time and completely offline, according to the developers. 

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Most animal call apps require an internet connection

Previous animal call recognition apps often reached their limits in practical use. Without a stable internet connection, real-time identification in the forest or high mountains was impossible. The new app solves this problem through technology. The underlying AI models have been optimized, downsized, and accelerated to such an extent that they can now run directly on a smartphone.   

Animal species are identified in 25 languages

Birdnet live can acoustically identify nearly 10,000 animal species—more than any other app, emphasized lead developer Stefan Kahl from the Department of Media Informatics at Chemnitz University of Technology. Currently, the app’s user interface is available in seven languages. The names of the identified animal species are translated into 25 languages.

According to the university, the app is primarily aimed at nature conservation experts, researchers, students, as well as ambitious citizen scientists and amateur ornithologists. The app automatically records animal sounds with precise location and time data and stores them locally on the smartphone. The recordings can be reviewed later, exported, or shared with other experts for validation. The German Federal Environmental Foundation funded the development team.

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