Voice Activity Detection is off by default. You can use the
"vors-vad [-rec ...] THRES" command with feeding audio record in its
stdin. It will print calculated sound RMS value if it exceeds the THRES
threshold. So you can manually try various THRES values to see when it
is comfortable to detect your voice. Pass the desired THRES value to
-vad option of vors-client.

    $ vors-vad 100
    [talk and see if threshold is low/high enough]
    [it is too sensible, let's try higher one]

    $ vors-vad 200
    [perfect!]

    $ vors-client -vad 200 [...]