Noise and vibration can be significant concerns when it comes to CPU air coolers. To address these issues, several measures can be taken. Firstly, the choice of fan is crucial. Some fans are designed with special bearings and blade shapes to reduce noise generation. Fluid dynamic bearings, for example, offer smooth operation and low noise levels. The fan speed can also be controlled to balance cooling performance and noise. Many motherboards and cooling software allow users to adjust the fan speed based on CPU temperature. In terms of vibration damping, rubber pads or grommets can be used to isolate the fan and heat sink from the motherboard and case. These materials absorb vibrations and prevent them from being transmitted, reducing noise. Additionally, the design of the heat sink can also contribute to noise reduction. A densely packed heat sink with well-designed fins can dissipate heat more efficiently at lower fan speeds, resulting in less noise.