Why is Digital Audio Better?

Feature photo courtesy of and copyright Free Range Stock


We live in an age of constant technological advancement, so it is no wonder that even two way radios have gone digital.

One product, we’re specifically excited about, is the Vertex Standard EVX-Link. This little box of magic, makes it possible to extend your digital two way radio network as far as you want it to go, without the need to invest in various repeater towers, antennas, etc.

In addition to such innovative accessories, if you compare an analog two way radio with a digital two way radio, you’ll notice that the digital radio’s audio quality is also much better – not only because it doesn’t gradually deteriorate the further your radio users move from away from each another, but also due to a crisper sound and less background noise.

The increased static you’ll hear on an analog two way radio the farther out you go, might be quite obvious (we’re talking RF signals here), but as for the rest, we’ll let Bearcom explain why:

With analog two-way radios, the natural human voice is carried by radio signals. You can hear the person’s voice exactly as it sounds, and interference, obstacles, and coverage limitations can significantly degrade quality. In contrast, digital radios create an electronic version of our voices. The vocoder inside the radio converts traditional analog voice signals into positive and negative binary signals, and transmits this digital information to the other radio. Then the vocoder on the other end translates the signal back to an analog voice, so the signal goes from analog to digital and back to analog.

One of the major shortcomings of an analog radio system is that once you push the button to talk, you’re speaking into an open microphone that picks up any nearby noises and transmits them along with your voice. A digital radio is designed to do a much better job of filtering out background sounds that can clutter analog transmissions. The vocoder essentially knows how to turn up the human voice and turn down everything else. That’s because the vocoder has been programmed to identify the sound of people talking.

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