• Article

    Sound quality

Dr Sound explains double talk

Dear readers, Dr Sound is back with a new post about sound and sound technology. The subject this time is a really exciting and interesting one called double talk.

Double talk … or full duplex, is all about having the capability for several people being able to talk at the same time, without anyone being cut out. The simplest form of remote communication is what we call simplex. With simplex, one device transmits while the other receives, and only one device can transmit at a time.

Full Duplex means that people can talk at the same time without anyone being cut out.

This is how a traditional communication radio work, with a button you push when you talk. We've all seen movie heroes, with their helmets askew, shouting into a communication radio things like: "We need support, over! We’ll cover you! Over and out!"

Simplex, only one device can transmit while the other receives Like a traditional communication radio.

The intermediate step is half duplex. It's like simplex but is automatically controlled, with the direction of communication being determined by who speaks the loudest. Before the digital era, and consequently before echo cancellation, full duplex was impossible for a speaker phone simply because it would have caused feedback. The incoming “speaker sound”, along with the effects of the room, could not be eliminated before the microphone transmitted.
This is why full duplex is the aim for all telecommunication and also during teleconferences. Long distance conversations with full duplex, are now possible thanks to good digital technology and echo cancelling. A fact that has given us the capability to interrupt one another…

Conversations at distance with full duplex, are now possible thanks to good digital technology and echo cancelling.

Do you want to hear me talk about double talk and listen to some examples? Check out this video that covers it.

Fachhändler suchen

Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jeff May
Jeff May
Regional Sales Director



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Nipun Khanna
Nipun Khanna
Sales director for Southern Asia and ME



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Simon Chin
Simon Chin
Regional Sales Director APAC



Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager


Ihr Fachhändler vor Ort

Alle anzeigen
Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries


Ihr Fachhändler vor Ort

Alle anzeigen
Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Holger Klenner
Holger Klenner
Key Account Manager Germany
+49 (0)2173 499 5841
Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220



Ihr Fachhändler vor Ort

Alle anzeigen
Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Simon Chin
Simon Chin
Regional Sales Director APAC



Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Nipun Khanna
Nipun Khanna
Sales director for Southern Asia and ME



Jeff May
Jeff May
Regional Sales Director



Simon Chin
Simon Chin
Regional Sales Director APAC



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jeff May
Jeff May
Regional Sales Director



Simon Chin
Simon Chin
Regional Sales Director APAC



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Jeff May
Jeff May
Regional Sales Director



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220



Ihr Fachhändler vor Ort

Alle anzeigen
Jeff May
Jeff May
Regional Sales Director



Jeff May
Jeff May
Regional Sales Director



Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager


Ihr Fachhändler vor Ort

Alle anzeigen
Jeff May
Jeff May
Regional Sales Director


Ihr Fachhändler vor Ort

Alle anzeigen
Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jeff May
Jeff May
Regional Sales Director



Jeff May
Jeff May
Regional Sales Director


Ihr Fachhändler vor Ort

  • 1

    Africa Telco Business (PTY) Ltd

    Unit 7 Coram Office Park, Ferero Road, Randparkridge

    0027117924962

  • 2

    Aria Technologies Africa (PTY) Ltd

    24 Tsessebe Crescent Building 9, Corporate Park South Midrand, 1685, South Africa

    0027112030360

  • 3

    Electronic Communications Network (PTY) Ltd

    Unit 10, Growthpoint Business Park, Midrand, Gauteng

    002710590000

  • 4

    Trenic Industries (PTY) Ltd

    Unit C, Building 2, 5 Woodlands Drive Office park Woodmead 2191, South Africa

    0027114664278

Alle anzeigen
Nipun Khanna
Nipun Khanna
Sales director for Southern Asia and ME



Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager



Jörgen Rönnqvist
Jörgen Rönnqvist
Area Sales Manager Nordic and Baltic countries

Mattias Hedin
Mattias Hedin
Key Account Manager


Ihr Fachhändler vor Ort

Alle anzeigen
Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Simon Chin
Simon Chin
Regional Sales Director APAC



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jeff May
Jeff May
Regional Sales Director



Jeff May
Jeff May
Regional Sales Director



Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


Jeff May
Jeff May
Regional Sales Director


Ihr Fachhändler vor Ort

Alle anzeigen
Ralf Kalker
Ralf Kalker
Regional Sales Director
+49 (0)221 959 2220


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