Re: HD RADIO is no worse than DAB or DRM radio

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Article #808

#808

From: David Eduardo
Date: Sun, 30 Sep 2007 21:09

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"SoCal Tom" <me@champmail.net> wrote in message 
news:Crqdndk7urPjlp3anZ2dnUVZ_g-dnZ2d@championbroadband.com...
>
> "SFTV_troy" blabbed:
> <... this new receiving technique would not improve the sound
>> (it would still be limited from 100-6000 hertz), but would only reduce
>> interference.
>>
> At least in the States, AM & FM broadcasting is limited to 50 Hz to 15KHz.

AM is restricted by the NRSC standard to a 10 kHz brick wall.
>
> Digital broadcasting is limited to under 20 Hz to over 20KHz, or 
> basically, the extent of the normal human hearing range.
>
> If you're listening to 100 to 6,000 Hz, you're listening to a poor 
> telephone connection.

Bob Orban, on the NRSC committee, found that consumer radios almost without 
exception, rolled off by at least 10 db by 4.2 kHz, and passed practically 
nothing over 5 kHz.

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From: "David Eduardo" <david@davideduardo.com>
Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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Subject: Re: HD RADIO is no worse than DAB or DRM radio
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