College of Liberal Arts & Sciences
3E80.10 - Digital Reproduction CD with Holes
Holes of increasing size have been drilled into this CD. They are: # 80 (.25mm), # 75 (.45mm), # 60 (.9mm), # 50 (1.65mm), #31 ( 2.9mm). Play the CD and you will see that the data on the CD is coded so as to override localized damage to the disc, correcting for "burst errors". On this disc you will start to hear skipping on the third track somewhere between 2:45 and 4:00 minutes depending on the quality of the CD player. This is approximately where the largest hole is drilled.
- Matthew Vick, "Digitizing Sound: How Can Sound Waves be Turned into Ones and Zeroes?", TPT, Vol. 48, # 7, p. 468.
- H4 - 67, University of Maryland, Lecture Demonstration Site.
Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.