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From: hrs@houxb.UUCP (H.SILBIGER)
Newsgroups: net.audio
Subject: Re: CD "facts" (digital speakers?)
Message-ID: <366@houxb.UUCP>
Date: Thu, 4-Oct-84 08:31:22 EDT
Article-I.D.: houxb.366
Posted: Thu Oct  4 08:31:22 1984
Date-Received: Fri, 5-Oct-84 05:32:15 EDT
References: <325@ihu1e.UUCP> hound.652
Lines: 11


There is indeed a digital reproducer in the form of an earphone
which was patented by Bell Labs. I believe the inventor was Jim
Flanagan of the Acoustical Research Depatment. It used acoustical
filters for the D/A conversion. There is also a digital
microphone (acoustical A/D), making it possible to build
a truly digital telephone set, i.e. no analog circuits
whatsoever.

Herman Silbiger
.'