Abstract: A method comprising causing display of a portion of map information on a display, receiving information indicative of a first display input at a first display input position that corresponds with a first map position along a traversable path that is indicated by the displayed portion of the map information, causing display of first supplemental map information that comprises at least one element associated with the first map position that is absent from the map information, receiving information indicative of a first non-display input at a first non-display input position, determining a second map position along the traversable path based on the first non-display input position, the second map position failing to correspond with the displayed portion of the map information, and causing display of second supplemental map information that comprises at least one element associated with the second map position that is absent from the map information is disclosed.

Abstract: It is known in the state of the art to dampen noise emissions by means of "anti-sound". In the gas exhaust installations of combustion machines, this is realized most often in that the exhaust gas flowing in the gas exhaust installation is charged with "anti-sound" produced by loudspeakers (12). However, such arrangements are disadvantageous in that the flow of hot exhaust gases reduces the service life of the loudspeakers, or that such measures are insufficient for actively damping the sound. The invention therefore presents an arrangement that avoids the disadvantages that exist in the state of the art. According to the invention, this is achieved in that the gas exhaust tube (10) ends in one of the two chambers of a double chamber box (17), and that a bass reflex tube (21) protrudes into this chamber of the double chamber box (17).