You can play with the
SENSITIVITY parameter for the hotword detection.
To do so, edit your
/usr/bin/snips file like so :
docker run [...] -e SNIPS_HOTWORD_MQTT_ARGS="--sensitivity=0.5" [...] snipsdocker/platform:arm-latest
You can fiddle around different values and choose which one suits you best.
Also, you can play with the recording level of your microphone, by issuing :