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Old 14th February 2012
  #72
Lives for gear
 

effectively anechoic != anechoic. even GML stated this regarding Blackbird C (so many wanted to assume that -30dB was "anechoic").

'effectively anechoic' is the same term used as with regards to the ISD-gap; which means all signals are below human detection threshold. the low-gain signals in ISD are NOT anechoic, but effectively anechoic and thus not processed by ear-brain as distinct signals.