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Compensating filters

  • US 5,815,580 A
  • Filed: 02/18/1997
  • Issued: 09/29/1998
  • Est. Priority Date: 12/11/1990
  • Status: Expired due to Fees
First Claim
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1. Apparatus for generating an audio test signal comprising means (8) for generating a periodically repeating signal with a broad band frequency content and a periodically varying phase, in which the phase repetition period exceeds the signal repetition period.

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