Mark 0659

Hi guys so I have a 2012 3L sdv6 auto disco 4 which has started with a sucking noise from the air intake in the wing ,checked all normal stuff but Carnot find anything so was wondering if anyone has had or heard of this problem sounds like a vacuum any advise welcomed guys got to get to the bottom of this my other half is a disabled war vet and it’s her ride for hospital etc. Cheers mk