Abstract: There is provided a haptic system, comprising: a housing, two drive units coupled to the housing, each drive unit comprising a mass movable relative to the housing, and a controller configured to generate a haptic signal by causing at least one drive unit to exert a net force to be exerted on the housing. There is also provided a method for providing a haptic signal comprising: generating a first haptic signal, using a haptic system, after a first interaction with a user interface element; and generating a second haptic signal, using the haptic system, after a second interaction with the user interface element; wherein the second haptic signal is different from the first haptic signal; and wherein the first and second haptic signals are at least one of: associated with different functions of the user interface element; and associated with a parameter adjusted by the user interface element.

Abstract: A speaker transducer, comprising a speaker membrane and two drive members connected to an outer membrane circumference of the speaker membrane for driving the speaker membrane. A substantially rigid support member is connected to each of the two drive members and extends there between, wherein the support member is connected to and extends along the speaker membrane.

Abstract: A speaker transducer, comprising a speaker membrane and two drive members connected to an outer membrane circumference of the speaker membrane for driving the speaker membrane. A substantially rigid support member is connected to each of the two drive members and extends there between, wherein the support member is connected to and extends along the speaker membrane.

Abstract: A speaker unit (1) with a speaker frame (9) and two membranes (7, 8) arranged in the speaker frame (9). A first membrane (7) radiates in a major acoustic radiation direction (A) substantially perpendicular to a major plane (9a) of the speaker unit (1). A second membrane (8) has a secondary acoustic radiation direction (B) different from the major acoustic radiation direction (A). Two drive units (2) are positioned within the speaker frame (9), attached to the two membranes (7, 8), and positioned coaxial to each other at the same height in the speaker frame (9). An acoustic duct (6) provides for a closed acoustic channel from the second membrane (8) in the secondary acoustic radiation direction (B) to a secondary surface (6a) of the speaker unit (1) in a same plane as the major plane (9a) of the speaker unit (1).