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Background Noise

According to the ITU (see ITU-T P.861), background noise typically has a
"Hoth" spectrum:

D. Hoth, "Room noise spectra at subscriber's telephone locations", JASA V12
pp499-504 April 1941

Of course this was in the last centry, before the intrusion of mobile phones


Mike Brookes, EEE Dept, Imperial College, London SW7 2BT, UK
  Tel: +44 (0) 171-594-6165       Fax: +44 (0)  171-823-8125
Email: mike.brookes@ic.ac.uk
  WWW: http://www.ee.ic.ac.uk/hp/staff/dmb/dmb.html