Dyson purifier - desk: The sound level at minimum flow rate is quieter than 35dB. The sound level at maximum flow rate is 59 dB.

Dyson purifier - tower: The sound level at minimum flow rate is quieter than 35dB. The sound level at maximum flow rate is 63 dB.

Continuous monitoring 

When active, and when the machine is in a standby state, users may hear a low humming sound. This is caused by the onboard sensors. Turning this feature off in the MyDyson app will stop this sound from occurring.

Read the ‘Using Continuous monitoring’ article to learn how to enable and disable this feature.