Now... I don't know really how to describe this.

When driving at motorway speeds sometimes a sound like...

"whooping" or like blowing in a bottle occurs.

It comes in front of my, LHD car. And no, it's not the engine.

Any ideas?  Range Rover SV Autobiography LWB 5.0 S/C -17
Aston Martin Rapide S -17
Range Rover Sport SDV6 Autobiography Dynamic -14

previous: Range Rover 5.0 Supercharged -10, Land Rover Defender 110 SW LXV -14, Discovery 4 HSE -11

If you can somehow record it for us that would help? Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

Mine does that,

Do you notice the air con fan speed change at the same time? Thats what happens in mine, faint whoop then the fans kicks in or changes speed, i think it may be the motors in the box which directs the air moving the batfles. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6