[ICOM] re: speaker filter (or Headset ?)

[David J. Ring, Jr.]

The "noise canceling" headphones sold by Bose and most others only cancel 
noise in the room.  They do NOT cancel noise on the audio signal to the 
headphones.

To cancel noise on the audio signal, some sort of receiver filtering, or add 
on DSP must be used.

The Bose is a totally different animal.

73
DR
----- Original Message ----- 
From: "Malcolm Ringel" <mringel at bluecrab.org>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Thursday, September 09, 2004 3:29 PM
Subject: Re: [ICOM] re: speaker filter (or Headset ?)


The original question referred to speakers and/or headphones. I wonder if
anyone here has used their Icom (!) xcvr with a set of the so-called
"noise-canceling" headphones, such as those recently offered by Bose.
Malcolm, K3KZ
----- Original Message ----- 
From: <aa7zc at bendbroadband.com>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Wednesday, September 08, 2004 8:45 PM
Subject: RE: [ICOM] re: speaker filter


> Hi,
>
> Several companies make outboard audio systems. You probably want an active
> DSP system as opposed to a passive audio filter. Either way you can check
> with
> SGC -they make either outboard or internally installed DSP filters.
> I have used their product and I think it is excellent.
>
> Gap antennas has an outboard filter (If I remember correctly)
>
> MFJ They have audio systems to both boost and cut audio signals
> and may have an outboard DSP unit.
>
> I think there may be a couple more out there as well.
>
> 73
> Barry
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
On
> Behalf Of Hart Engel
> Sent: Wednesday, September 08, 2004 2:54 PM
> To: icom at mailman.qth.net
> Subject: [ICOM] re: speaker filter
>
> I would like to know if there is a filter that I can buy or build that
will
> remove the hash noise (fried egg sound as i call it) that I can put into a
> external speaker or headphones. If I can't build one, can anyone recomend
a
> external speaker or headphones with this type of filter system. And yes I
> have serched te web and found very little on the subject.
>
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>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
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>


----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/