![A historic tape-based and partly burned voice recorder is seen at Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) at their headquarters in Braunschweig March 20, 2015. The A historic tape-based and partly burned voice recorder is seen at Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) at their headquarters in Braunschweig March 20, 2015. The](https://c8.alamy.com/comp/2E5MY6E/a-historic-tape-based-and-partly-burned-voice-recorder-is-seen-at-germanys-bundesamt-fuer-fluguntersuchung-bfu-german-federal-bureau-of-aircraft-accident-investigation-at-their-headquarters-in-braunschweig-march-20-2015-the-task-of-the-bfu-is-to-investigate-into-accidents-and-serious-incidents-to-civil-aircraft-in-germany-to-determine-the-causes-of-the-occurrences-flight-recorders-or-black-boxes-used-in-investigations-of-aviation-catastrophes-since-the-mid-20th-century-have-developed-considerably-over-the-years-while-older-recorders-contained-spools-of-magnetic-tape-modern-devices-2E5MY6E.jpg)
A historic tape-based and partly burned voice recorder is seen at Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) at their headquarters in Braunschweig March 20, 2015. The
![An employee of Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) holds a Russian-made historic tape-based voice recorder at their headquarters in Braunschweig March 20, 2015. The task An employee of Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) holds a Russian-made historic tape-based voice recorder at their headquarters in Braunschweig March 20, 2015. The task](https://c8.alamy.com/comp/2D056HM/an-employee-of-germanys-bundesamt-fuer-fluguntersuchung-bfu-german-federal-bureau-of-aircraft-accident-investigation-holds-a-russian-made-historic-tape-based-voice-recorder-at-their-headquarters-in-braunschweig-march-20-2015-the-task-of-the-bfu-is-to-investigate-into-accidents-and-serious-incidents-to-civil-aircraft-in-germany-to-determine-the-causes-of-the-occurrences-flight-recorders-or-black-boxes-used-in-investigations-of-aviation-catastrophes-since-the-mid-20th-century-have-developed-considerably-over-the-years-while-older-recorders-contained-spools-of-magnetic-tape-modern-de-2D056HM.jpg)
An employee of Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) holds a Russian-made historic tape-based voice recorder at their headquarters in Braunschweig March 20, 2015. The task
![Statistical analysis of ground based magnetic field measurements with the field line resonance detector – topic of research paper in Physical sciences. Download scholarly article PDF and read for free on CyberLeninka Statistical analysis of ground based magnetic field measurements with the field line resonance detector – topic of research paper in Physical sciences. Download scholarly article PDF and read for free on CyberLeninka](https://cyberleninka.org/viewer_images/723932/f/1.png)
Statistical analysis of ground based magnetic field measurements with the field line resonance detector – topic of research paper in Physical sciences. Download scholarly article PDF and read for free on CyberLeninka
![An employee of Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) holds a historic and partly burned tape-based voice recorder at their headquarters in Braunschweig March 20, 2015. An employee of Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) holds a historic and partly burned tape-based voice recorder at their headquarters in Braunschweig March 20, 2015.](https://c8.alamy.com/comp/2CWF550/an-employee-of-germanys-bundesamt-fuer-fluguntersuchung-bfu-german-federal-bureau-of-aircraft-accident-investigation-holds-a-historic-and-partly-burned-tape-based-voice-recorder-at-their-headquarters-in-braunschweig-march-20-2015-the-task-of-the-bfu-is-to-investigate-into-accidents-and-serious-incidents-to-civil-aircraft-in-germany-to-determine-the-causes-of-the-occurrences-flight-recorders-or-black-boxes-used-in-investigations-of-aviation-catastrophes-since-the-mid-20th-century-have-developed-considerably-over-the-years-while-older-recorders-contained-spools-of-magnetic-tape-mode-2CWF550.jpg)
An employee of Germany's Bundesamt fuer Fluguntersuchung BFU (German Federal Bureau of Aircraft Accident Investigation) holds a historic and partly burned tape-based voice recorder at their headquarters in Braunschweig March 20, 2015.
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