US Patent 10060648 Air conditioner and method of operating the same

An conditioner including a compressor that compresses refrigerant, an outdoor unit fan that blows out the air heat-exchanged by an outdoor heat exchanger, a noise sensor that measures noise, a data part that saves noise data measured by the noise sensor, a control part that performs a low noise operation by distinguishing between ambient noise and noise made by the air conditioner based on noise measurements from the noise sensor, wherein the control part sets a target noise level according to the ambient noise, changes the operational settings of the compressor and outdoor unit fan, and controls the operation to ensure that the noise from the air conditioner does not exceed an environmental noise regulatory value.