An audio generator (410, 190) comprising: a first transducer element being mounted such that the first transducer element can cause audio waves to propagate in a first direction; a second transducer element being mounted such that the second transducer element may cause audio waves to propagate in a second direction which is different to the first direction; the first transducer element has a first membrane having a surface which is non-flat, wherein the first transducer element includes a first means for causing the first membrane to move in dependence on an electric speaker drive signal; the second transducer element has a second membrane and a second means for causing the second membrane to move in dependence on the electric speaker drive signal, and the first membrane has an outer perimeter which is flexibly attached to a portion of a transducer element body; said outer perimeter defining a first aperture having a first aperture plane; and wherein, in operation, the first membrane is adapted to cause said audio pressure waves to propagate in the first direction (M, 300, 300A,) orthogonal to said first aperture plane; the audio generator further comprising a reflector, the reflector having a surface adapted to reflect acoustic signals; and directive guiding walls (510,520,530,540) wherein said audio generator (410, 190) further comprises an enclosure adapted to enclose a space between the first transducer element and the second transducer element, and a second aperture, the reflector co-operating with the directive guiding walls so as to lead and guide said audio pressure waves to propagate in a third direction; said third direction being orthogonal to the plane of said second aperture and different from said first direction; and wherein the acoustically reflective surface has a non-flat contour, wherein the first transducer element and the second transducer element being connected in reverse phase so that the second membrane interacts with the first membrane to reduce or eliminate air pressure variations within said enclosed space. a first transducer element being mounted such that the first transducer element can cause audio waves to propagate in a first direction; a second transducer element being mounted such that the second transducer element may cause audio waves to propagate in a second direction which is different to the first direction; the first transducer element has a first membrane having a surface which is non-flat, wherein the first transducer element includes a first means for causing the first membrane to move in dependence on an electric speaker drive signal; the second transducer element has a second membrane and a second means for causing the second membrane to move in dependence on the electric speaker drive signal, and the first membrane has an outer perimeter which is flexibly attached to a portion of a transducer element body; said outer perimeter defining a first aperture having a first aperture plane; and wherein, in operation, the first membrane is adapted to cause said audio pressure waves to propagate in the first direction (M, 300, 300A,) orthogonal to said first aperture plane; the audio generator further comprising a reflector, the reflector having a surface adapted to reflect acoustic signals; and directive guiding walls (510,520,530,540) wherein said audio generator (410, 190) further comprises an enclosure adapted to enclose a space between the first transducer element and the second transducer element, and a second aperture, the reflector co-operating with the directive guiding walls so as to lead and guide said audio pressure waves to propagate in a third direction; said third direction being orthogonal to the plane of said second aperture and different from said first direction; and wherein the acoustically reflective surface has a non-flat contour, the first transducer element and the second transducer element being connected in reverse phase so that the second membrane interacts with the first membrane to reduce or eliminate air pressure variations within said enclosed space.