Abstract: An apparatus comprises at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: determine at least one parameter of a transducer on the basis of received information; and modify a received signal for actuating the transducer on the basis of the determined parameters of the transducer and a frequency spectrum of the received signal. The apparatus protects the transducer from damage due to excessive displacement caused by the received signal.

Abstract: An apparatus comprises at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: determine at least one parameter of a transducer on the basis of received information; and modify a received signal for actuating the transducer on the basis of the determined parameters of the transducer and a frequency spectrum of the received signal.

Abstract: The present invention relates to the field of extracting a plurality of sub-windows of a scanning area of an external object to be scanned by means of a digital video camera providing a digital video stream of said scanning area. In a first step a defining of a size and a position for each of one or more sub-windows from said plurality of sub-windows representing one or more regions of interest within said scanning area is provided. Next a extracting of said defined one or more sub-windows from said digital video stream of said scanning area is provided, wherein said extracting is substantially simultaneously done if more than one sub-window from said plurality of sub-windows is defined follows. Further, a digital camera adapted for extracting of sub-windows of a scanning area is provided.