Talkback is a function that can be added to the radio. Talkback
enables the radio operator to hear his/her voice through the
radio's internal speaker or an external speaker. This Talkback
feature is set at a fixed volume level and is on at all times.
Talkback is imperative if you intend to add a noise toy or
echo. It enables the user to hear when the toy has finished,
and also aids in setting an echo.
The acoustics of every auto varies from one auto to another.
External speakers have a different tone and loudness characteristics
from one brand and model to another. The sensitivity of one
brand of mic compared to another is also quite different.
We need to know what type of mic, the brand and model of
speaker to be used and approximate placement of the speaker
in relation to the mic in order to set the loudness of the
talkback. Notes may be added to the note section when placing