A little background noise is okay, but if you can hear another person speaking distinct words, the clip should be rejected. Typically this happens where the TV has been left on, or where there is a conversation going on nearby.
ⵉⵎⵉⴽⴽ ⵏ ⵓⴷⵉⴷⴰ ⵏ ⵜⵖⵔⴷⵉⵏ ⵡⴰⵅⵅⴰ, ⵎⴰⵛⴰ ⵎⴽ ⵜⵣⵎⵔⴷ ⴰⴷ ⵜⵙⵍⵍⴷ ⵉ ⴽⵔⴰ ⵏ ⵓⴼⴳⴰⵏ ⵢⴰⴹⵏ ⵉⵙⴰⵡⴰⵍⵏ ⵜⵉⴳⵓⵔⵉⵡⵉⵏ ⵏⴰⵃⵢⴰ ⵜⵏ, ⵉⵅⵚⵚⴰ ⴰⴷ ⵜⴻⵜⵜⵢⴰⴳⴰⵢ ⵜⵓⵙⵙⵉⴼⵜ. ⵍⴰ ⵉⵜⵜⵎⵙⴰⵔ ⵓⵢⴰ ⵙ ⵓⵎⴰⵜⴰ ⴷⵉⵏⵏⴰ ⴳ ⵉⵇⵇⵉⵎ ⵓⵜⵉⵍⵉⴼⵉⵣⵢⵓⵏ ⵉⵔⵖⴰ, ⵏⵉⵖ ⴷⵉⵏⵏⴰ ⴳ ⵉⵍⵍⴰ ⴽⵔⴰ ⵏ ⵓⵎⵔⴰⵔⴰ ⵏ ⵡⴰⵡⴰⵍ ⵜⴰⵎⴰ ⵏⵏⵙ.