Why does the middle frame and strap make noises when the Xiaomi Smart Band 10 is vibrating?

The Xiaomi Smart Band 10 has undergone strict inspection before leaving the factory. The band supports adjusting the vibration mode, and you can also configure the vibration intensity as [Strong], [Standard], and [Soft], so please feel free to use it.
For your reference, here are more details about the middle frame and strap make noises when the band is vibrating:
1. At certain angles or in specific scenarios, the vibration motor will cause the frame and strap to vibrate together, producing noise, which is a normal physical phenomenon. In addition, wearing the band too loosely will also cause abnormal noise while wearing it;
2. Harder materials like ceramic or metal can amplify vibration sounds compared to softer materials;
3. Over time, regular use can loosen the fit between the strap and the frame, making noises more noticeable during vibrations.