[VoiceOps] Call Quality

[mgraves mstvp.com]

That’s nice. However, a simple headset with a boom mounted microphone is a vast improvement over a typical situation.

Even a cheap one from Koss. https://www.zipdx.info/product-review-koss-cs300-usb-headset/

We have a special service for use by conference interpreters like those who work for the UN. We have to occasionally review headsets to verify reliable, full-duplex performance.

There are some USB audio interface chips that degrade microphone performance while in the presence of incoming sound. It’s a faulty echo cancellation scheme implemented in silicon.

Michael Graves
mgraves at mstvp.com<mailto:mgraves at mstvp.com>
o: (713) 861-4005
c: (713) 201-1262
sip:mgraves at mjg.onsip.com

From: Mike Hammett <voiceops at ics-il.net>
Sent: Monday, June 14, 2021 5:05 PM
To: mgraves mstvp.com <mgraves at mstvp.com>
Cc: voiceops at voiceops.org; Tim Bray <tim at kooky.org>
Subject: Re: Call Quality

*nods* When in the home office, I use my podcasting setup (headphones, dedicated mic, ran through some software to clean up a bit more.)


-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com



Midwest Internet Exchange
http://www.midwest-ix.com



________________________________
From: "mgraves mstvp.com" <mgraves at mstvp.com<mailto:mgraves at mstvp.com>>
To: "Mike Hammett" <voiceops at ics-il.net<mailto:voiceops at ics-il.net>>, "Tim Bray" <tim at kooky.org<mailto:tim at kooky.org>>
Cc: voiceops at voiceops.org<mailto:voiceops at voiceops.org>
Sent: Monday, June 14, 2021 4:53:27 PM
Subject: RE: Call Quality
Working for a conferencing company, we hear all about this.

You’d think that acoustic echo cancellation was settled science, and you’d be wrong. There are so many bad quality speakerphones and conference phones.

Further, so many software engineers (yes, you Google!) think they have some special insight. Their stuff is just as bad as others. Worse because it can be variable.

Bottom line is, if you must hear and be heard well…when it really matters….use a headset.

Michael Graves
mgraves at mstvp.com<mailto:mgraves at mstvp.com>
o: (713) 861-4005
c: (713) 201-1262
sip:mgraves at mjg.onsip.com

From: VoiceOps <voiceops-bounces at voiceops.org<mailto:voiceops-bounces at voiceops.org>> On Behalf Of Mike Hammett
Sent: Monday, June 14, 2021 4:46 PM
To: Tim Bray <tim at kooky.org<mailto:tim at kooky.org>>
Cc: voiceops at voiceops.org<mailto:voiceops at voiceops.org>
Subject: Re: [VoiceOps] Call Quality

God, I hope customers don't hold their carriers responsible for inappropriate use of speakerphones.


Yes, I'm sure the complaints received for the above are non-null. That's how much faith I have in customers.


-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com



Midwest Internet Exchange
http://www.midwest-ix.com


________________________________
From: "Tim Bray via VoiceOps" <voiceops at voiceops.org<mailto:voiceops at voiceops.org>>
To: voiceops at voiceops.org<mailto:voiceops at voiceops.org>
Sent: Monday, June 14, 2021 4:36:55 PM
Subject: Re: [VoiceOps] Call Quality

On 14/06/2021 22:25, Mike Hammett wrote:
> One of the concerns I heard was echo. On a purely digital call, what
> would be the cause of echo?

Echo, as in hearing yourself coming back with a delay?

Sound flying from the speaker to the microphone at the far end. Dodgy
speaker phone, poor plastic design of the phone, DSP not doing echo
cancellation.   Or too much end to end latency - if it is quick enough,
you don't notice.  Could be loads of things.




Quite often with third party USB  or bluetooth `speaker phones`



--
Tim Bray
Huddersfield, GB
tim at kooky.org<mailto:tim at kooky.org>

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