Abstract: A vacuum cleaner comprises a suction motor, a suction fan which is to be driven by the suction motor to generate airflow, and a main body housing which accommodates the suction motor and the suction fan. The vacuum cleaner comprises a silencer having one end coupled to the main body housing to reduce noise inside the main body housing during an operation of the intake motor. The silencer includes a contact surface disposed in the one end of the silencer to face the suction fan so as to contact the airflow, and includes a silencer chamber partitioned from the interior of the main body housing by means of the contact surface. The silencer includes a plurality of through-holes arranged in the contact surface to have the noise chamber to be in communication with an inside of the main body housing through the plurality of through holes.

Abstract: An oven includes a cavity forming a cooking chamber therein. The oven includes a convection assembly disposed on a rear wall of the cavity. The convection assembly may include a convection fan to form an air flow in the cooking chamber, a convection motor to generate a driving force to the convection fan, and a motor cover to surround at least a portion of the convection motor. The motor cover may be made of a magnetic material to induce a magnetic flux generated upon driving of the convection motor.

Abstract: Disclosed herein is a range hood having improved sound characteristics by improving a structure thereof. The range hood includes a case including an inlet through which air is introduced, and a fan module arranged inside the case to suck air through the inlet. The fan module includes a fan configured to move air by rotating, a motor configured to supply a driving force to rotate the fan, a fan frame provided to accommodate the fan and the motor therein, the fan frame including a fan inlet and a fan outlet, and a sound generating member provided to generate a sound of a predetermined frequency band when in contact with the air discharged through the fan outlet.

Abstract: An induction heater including a heating coil; a rectifier circuit; a power factor correction (PFC) circuit; a direct current (DC) link capacitor; and an inverter circuit connected to the DC link capacitor, and apply a drive current to the heating coil. The PFC circuit includes: a first inductor and a second inductor connected to an output node of the rectifier circuit; a first diode connected to the first inductor and the DC link capacitor; a second diode connected to the second inductor and the DC link capacitor; a first switching element connected to the first inductor and a ground node; and a second switching element connected to the second inductor and the ground node.

Abstract: A home appliance including a first microphone that is disposed on a surface of a housing, a second microphone that is disposed on an inside of the housing, and a processor configured to perform signal processing for first voice data that is acquired from the first microphone, and perform voice recognition using the signal-processed first voice data. The processor is further configured to generate noise data using second voice data that is acquired from the second microphone and perform signal processing for the first voice data using the generated noise data.

Abstract: An air cleaner including a housing including a flow path through which air is movable; a fan configured to operate to move air through the flow path; and an air guide adjacent to the fan, the air guide including a guide surface along which the air moving through the flow path flows while the fan operates, and a sound absorption hole extending from the guide surface so that a sound generated by the fan while the fan operates is absorbed through the sound absorption hole.

Abstract: Provided is a cleaner including: a main body; and a fan motor configured to generate a suction force inside the main body, wherein the fan motor includes: a motor configured to generate a rotational force; an impeller rotatable by the motor; and a diffuser configured to guide air discharged from the impeller, and wherein the main body includes: a body including a reduction part configured to reduce a maximum flow rate while maintaining an average flow rate of air discharged from the diffuser, and a body outlet configured to guide the air passed through the reduction part; and a filter with at least a portion disposed across the body outlet to filter out rubbish from the air discharged from the body outlet.

Abstract: A home appliance, a home appliance system, and a controlling method thereof are disclosed. The home appliance includes an input interface, a communication interface, a processor, and a motor, wherein the processor is configured to receive input of an instruction regarding whether to activate a noise control mode from a user through the input interface, receive notification information including at least one of a received call or a received message from a terminal device interlocked with the home appliance through the communication interface, and based on the noise control mode being in an inactivated state, ignore the notification information and maintain the driving speed of the motor.

Abstract: Provided is an electronic device. The electronic device includes a motor, a memory configured to store at least one of first frequency information associated with a sound that is generated when the motor is driven or second frequency information associated with a surrounding environment of the electronic device, and a processor configured to control the motor to be driven by avoiding a driving speed corresponding to the frequency information stored in the memory.

Abstract: Disclosed herein is a range hood having improved sound characteristics by improving a structure thereof. The range hood includes a case including an inlet through which air is introduced, and a fan module arranged inside the case to suck air through the inlet. The fan module includes a fan configured to move air by rotating, a motor configured to supply a driving force to rotate the fan, a fan frame provided to accommodate the fan and the motor therein, the fan frame including a fan inlet and a fan outlet, and a sound generating member provided to generate a sound of a predetermined frequency band when in contact with the air discharged through the fan outlet.

Abstract: A home appliance including a first microphone that is disposed on a surface of a housing, a second microphone that is disposed on an inside of the housing, and a processor configured to perform signal processing for first voice data that is acquired from the first microphone, and perform voice recognition using the signal-processed first voice data. The processor is further configured to generate noise data using second voice data that is acquired from the second microphone and perform signal processing for the first voice data using the generated noise data.

Abstract: A home appliance is provided. The home appliance includes a motor configured to execute a predetermined function of the home appliance, and a processor configured to determine an upper limit of noise of the home appliance based on ambient noise information of the home appliance and control a driving speed of the motor to have magnitude of noise of the home appliance equal to or less than the upper limit of the noise.

Abstract: A home appliance including a communication device configured to communicate with another home appliance, a microphone configured to receive a voice from a user, and a processor configured to perform signal processing on first voice data obtained from the microphone and perform voice recognition using the signal-processed first voice data. Wherein the processor generates noise data using second voice data received from the other home appliance and performs the signal processing on the first voice data using the generated noise data.

Abstract: A home appliance including a first microphone that is disposed on a surface of a housing, a second microphone that is disposed on an inside of the housing, and a processor configured to perform signal processing for first voice data that is acquired from the first microphone, and perform voice recognition using the signal-processed first voice data. The processor is further configured to generate noise data using second voice data that is acquired from the second microphone and perform signal processing for the first voice data using the generated noise data.

Abstract: A home appliance is provided. The home appliance includes a motor configured to execute a predetermined function of the home appliance, and a processor configured to determine an upper limit of noise of the home appliance based on ambient noise information of the home appliance and control a driving speed of the motor to have magnitude of noise of the home appliance equal to or less than the upper limit of the noise.

Abstract: A home appliance including a communication device configured to communicate with another home appliance, a microphone configured to receive a voice from a user, and a processor configured to perform signal processing on first voice data obtained from the microphone and perform voice recognition using the signal-processed first voice data. Wherein the processor generates noise data using second voice data received from the other home appliance and performs the signal processing on the first voice data using the generated noise data.

Abstract: A home appliance including a first microphone that is disposed on a surface of a housing, a second microphone that is disposed on an inside of the housing, and a processor configured to perform signal processing for first voice data that is acquired from the first microphone, and perform voice recognition using the signal-processed first voice data. The processor is further configured to generate noise data using second voice data that is acquired from the second microphone and perform signal processing for the first voice data using the generated noise data.

Abstract: Provided is an electronic device. The electronic device includes a motor, a memory configured to store at least one of first frequency information associated with a sound that is generated when the motor is driven or second frequency information associated with a surrounding environment of the electronic device, and a processor configured to control the motor to be driven by avoiding a driving speed corresponding to the frequency information stored in the memory.

Abstract: A device according to one disclosed embodiment comprises: a control part which determines at least one target frequency of an MRI noise signal generated in an MRI device and generates a control signal for the determined target frequency; and an output part which outputs the control signal, wherein the target frequency is the frequency of the MRI noise signal to be controlled and the control signal is a signal in which at least one of the size and the phase of the MRI noise signal is changed.

Abstract: A device according to one disclosed embodiment comprises: a control part which determines at least one target frequency of an MRI noise signal generated in an MRI device and generates a control signal for the determined target frequency; and an output part which outputs the control signal, wherein the target frequency is the frequency of the MRI noise signal to be controlled and the control signal is a signal in which at least one of the size and the phase of the MRI noise signal is changed.