According to the manufacture product page,the Fein 9-55-13 Turbo II is spec for "57.8 dB(A) noise level at 3.5 feet" For point of reference 0 dB Dead silence 20 dB Ticking stopwatch 60 dB Normal conversation 68 dB UltraSilencer vacuum 78 dB Standard vacuum cleaner 80 dB Fire truck/ambulance siren 90 dB Lawnmover ====== As the bag getting full the noise level will increase because it take move energy (Amperage) to displace air (vacuum). As a rule of thumb,do not wait until the vacuum is full to replace. Replace the bag when it get to 3/4 full. This will reduce the change of over heating the electrical motor and increase the longevity of the unit. ====== There is a free floating ball valve on the top portion of the unit. Make there is no air leak(s) on around the ball check valve and the top seal (where the black portion meet the base canister. ====== Keep exhaust port free from dirt. ====== Fein 9-55-13 Turbo II is a high end unit and 57.8 db is the lowest in the market. Keep the unit clean (intake and exhaust ports) and seals will keep it operating as the lowest noise level. There in no other commercial model can go below 57.8 db.
Answers & Comments
According to the manufacture product page,the Fein 9-55-13 Turbo II is spec for
"57.8 dB(A) noise level at 3.5 feet"
For point of reference
0 dB Dead silence
20 dB Ticking stopwatch
60 dB Normal conversation
68 dB UltraSilencer vacuum
78 dB Standard vacuum cleaner
80 dB Fire truck/ambulance siren
90 dB Lawnmover
======
As the bag getting full the noise level will increase because it take move energy (Amperage) to displace air (vacuum).
As a rule of thumb,do not wait until the vacuum is full to replace.
Replace the bag when it get to 3/4 full.
This will reduce the change of over heating the electrical motor and increase the longevity of the unit.
======
There is a free floating ball valve on the top portion of the unit.
Make there is no air leak(s) on around the ball check valve and the top seal (where the black portion meet the base canister.
======
Keep exhaust port free from dirt.
======
Fein 9-55-13 Turbo II is a high end unit and 57.8 db is the lowest in the market.
Keep the unit clean (intake and exhaust ports) and seals will keep it operating as the lowest noise level.
There in no other commercial model can go below 57.8 db.