Find a place away from other people - when you’re in a room with lots of background noise it makes it hard to hear your thoughts on the game. You also, agree to a non-disclosure agreement before every playtest that prohibits you from sharing anything about the game with anyone.
Make sure you have a good pair of headphones with a mic. This will make it easier to hear you clearly.
Turn off any fans or equipment that could make background noise - even though it sounds quiet in the room, the recorder will pick up the humming from fans, TVs and other electrical equipment.
If you have received feedback on your recording being difficult to hear, try some of these tips to limit the amount of background noise and echo on the recording:
close all the doors and windows in the room
make sure your microphone isn’t covered by your hands or clothes.
try recording in a confined space like your car
turn off notifications for when you’re doing a playtest, this will also stop you from getting distracted!
place your device closer to your mouth but try not to cough or snort into it.
use a different headset
move to another area if you are being interrupted by noise
try recording with a blanket over your head, this will limit echo and outside sounds on your recording.
Try to cough or sniff away from the mic - several people will be listening to your recording