Twin-Tone Tape Testing

Hueber GA, Nijholt B, Tendeloo H. Twin-Tone Tape Testing. In: AES Convention 51. Audio Engineering Society; 1975. Paper 1040. Available from: https://aes.org/publications/elibrary-page/?id=2392

@inproceedings{Hueber1975_2392,
  author = {Hueber, Gerardus A. and Nijholt, Bauke and Tendeloo, Han},
  title = {{Twin-Tone Tape Testing}},
  booktitle = {AES Convention 51},
  note = {Paper 1040},
  year = {1975},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=2392}
}

TY  - CPAPER
TI  - Twin-Tone Tape Testing
AU  - Hueber, Gerardus A.
AU  - Nijholt, Bauke
AU  - Tendeloo, Han
T2  - AES Convention 51
M1  - Paper 1040
PY  - 1975
DA  - 1975/05/06
UR  - https://aes.org/publications/elibrary-page/?id=2392
PB  - Audio Engineering Society
LA  - en
AB  - The paper describes the why and how of a double-tone distortion test technique, tailored to evaluation of magnetic tapes. The method is basically a special case of the CCIF intermodulation test. The test signal consists of two frequencies of equal amplitude and a frequency difference in the order of 10% (called a twin-tone), of which the generated sidebands are measured. By doing so, a test is devised which produces an unambiguous distortion criterion, applicable to the entire frequency range of the recorder/tape system. In this and other respects, the twin-tone method is superior to the THD and signal-compression criteria which could be replaced to advantage by the twin-tone technique as universal standard tape distortion test. The relation and differences with these conventional test techniques are given, both in mathematical form and by direct comparison of test results of a cassette tape. A detailed description of simple test equipment, field-proven for as many as 7-8 years, is given.
ER  -