Lennon joined the club from Everton during the winter window, while N'Koudou made the switch from Tottenham Hotspur on loan for the remainder of the season.
Cork has claimed that the attacking duo have provided Burnley with "a different dimension" as the Clarets look to overcome a run which has seen them go winless in 10 matches in all competitions.
"They have been great so far," Cork told Sky Sports News. "They are something completely different to what we have had before. You can tell the pace and liveliness of them when they have been on the pitch.
"They have done brilliant for us. It just gives us a different dimension for us to use. Sometimes it is nice to have a little change and something new and to keep everyone on their toes, to give everyone a boost to know we have still got a lot of work until the end of the season."
Burnley, who are still seventh in the Premier League table, are without a victory in any competition since December 12.