Dominant sound freq. [Hz], high range
Foam dust filter (7 V)
19330,546
Silon (40 den) on the circular grille (7 V)
19330,546
Circular grille (7 V)
18780,243
Silon (20 den) on the circular grille (7 V)
17726,189
Plastic dust filter (7 V)
5583,400
Hexagonal grill (7 V)
1974,030
No obstacle (7 V)
1974,030
Nylon dust filter (7 V)
1974,030