Dominant sound freq. [Hz], low range
Foam dust filter (7 V)
195,849
Nylon dust filter (7 V)
195,849
No obstacle (7 V)
130,713
Hexagonal grill (7 V)
126,992
Plastic dust filter (7 V)
126,992
Silon (20 den) on the circular grille (7 V)
126,992
Silon (40 den) on the circular grille (7 V)
126,992
Circular grille (7 V)
20,306