Micro-speaker device

A speaker device comprising:

• a housing having an acoustic aperture;
• a transducer element in the housing configured to receive a first actuation signal and to generate an acoustic output signal in response to the first actuation signal;
• a shutter element in the housing configured to receive a second actuation signal,
• wherein the shutter element is arranged in an acoustic path between the transducer element and the acoustic aperture and comprises a movable shutter portion, which is movable in opposite directions in response to the second actuation signal;
• and
• a controller configured to provide the first actuation signal to the transducer element, wherein the first actuation signal has an ultrasonic signal component which is modulated with an audio signal component, and the controller is further configured to provide the second actuation signal to the shutter element, wherein the second actuation signal has a second frequency that is half of a first frequency of the ultrasonic signal component,
• wherein the shutter element further comprises a stationary portion surrounding the movable shutter portion,
• wherein the movable shutter portion, in a closed condition, is aligned in parallel to or in a common plane with the stationary portion of the shutter element,
• wherein the movable shutter portion comprises a first shutter portion and a second shutter portion, which are movable in opposite directions in response to the second actuation signal, and wherein the movable shutter portion further comprises a disc element which is tiltable around a first tilting axis.