The Thermomix® noise level is dependent on the speed and what contents are inside of the mixing bowl.
It will be louder when starting to chop hard foods such as coffee beans, hard cheese, grains, ice, or frozen fruits.
If you need further assistance, please contact us at https://service.thermomix.com/hc/en-us/requests/new. Our Customer Happiness agents will get back to you in 1-2 business days.