A4. With regard to cooler fan noise, at a distance of 25cm from the cooler fan, When the fan is at half speed, the noise level: 44-46DB When the fan is at maximum speed, the noise level: 48-50DB At a distance of 15cm from the fan, When the fan is at half speed, the noise level: 44-48DB When the fan is at maximum speed, the noise level: 50-53DB