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RESTORATION OF HISTORICAL SOUND RECORDINGS

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 Application 1 : Aluminium recording media
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    Aims :

  • Non contact sound restoration from fragile mechanical audio recordings,
  • Method: acquire a digital map of the media surface using STIL sensor, and then apply image analysis methods to recover the audio data,
  • Preservation of popular music and other recordings of historical value,
  • Research carried out by Lawrence Berkeley National Lab. (Read More)
Click on image to improve definition
Aluminium audio recording media showing 3 tracks (false color Altitude image)
Aluminium audio recording media showing 3 tracks (gary level Intensity image)
1 - Aluminium audio recording media showing 3 tracks (false color Altitude image)
2 - Aluminium audio recording media showing 3 tracks (gary level Intensity image)
Profile along a track in image 2
Measurement parameters
Measurement system :
MICROMESURE 2 Profilometer
Controller :
CHR 150 L
Optical pen :
CL2 MG 140
Sample :
Ancient audio recording media
Material :
Aluminium
Picture size :
5 mm x 2 mm
Measurement pitch :
20 µm x 20 µm
3 - Profile along a track in image 2