An electro-acoustic transducer, comprising: a moving surface comprising first and second transverse sections (30,32) interconnecting first and second hemi-circular end sections (34,36); a motor to move the moving surface to create acoustic waves; at least two discontinuities (38A, 38B, 44A, 44B) formed in or in contact with the moving surface to radiate from at least one discontinuity junction point toward an edge of the moving surface to disrupt breakup of the moving surface, the at least two discontinuities (38A, 38B, 44A, 44B) being irregularly spaced in an azimuthal manner and/or at least one of the at least one discontinuity junction point is offset relative to a geometric center of the moving surface of the electro-acoustic transducer, and wherein the at least two discontinuities include: a first pair of discontinuities (38A, 38B) extending along a first major axis from the first hemicircular end section to the second hemi-circular end section; and a second pair of discontinuities (44A, 44B) bisecting the moving surface and the first pair of discontinuities and extending at an intersection angle substantially other than 90 degrees, wherein the second pair of discontinuities extends from a first intersection between the first transverse section and the first hemi-circular end section to a second intersection between the second transverse section and the second hemi-circular end section. a moving surface comprising first and second transverse sections (30,32) interconnecting first and second hemi-circular end sections (34,36); a motor to move the moving surface to create acoustic waves; at least two discontinuities (38A, 38B, 44A, 44B) formed in or in contact with the moving surface to radiate from at least one discontinuity junction point toward an edge of the moving surface to disrupt breakup of the moving surface, the at least two discontinuities (38A, 38B, 44A, 44B) being irregularly spaced in an azimuthal manner and/or at least one of the at least one discontinuity junction point is offset relative to a geometric center of the moving surface of the electro-acoustic transducer, and wherein the at least two discontinuities include: a first pair of discontinuities (38A, 38B) extending along a first major axis from the first hemicircular end section to the second hemi-circular end section; and a second pair of discontinuities (44A, 44B) bisecting the moving surface and the first pair of discontinuities and extending at an intersection angle substantially other than 90 degrees, wherein the second pair of discontinuities extends from a first intersection between the first transverse section and the first hemi-circular end section to a second intersection between the second transverse section and the second hemi-circular end section. a first pair of discontinuities (38A, 38B) extending along a first major axis from the first hemicircular end section to the second hemi-circular end section; and a second pair of discontinuities (44A, 44B) bisecting the moving surface and the first pair of discontinuities and extending at an intersection angle substantially other than 90 degrees, wherein the second pair of discontinuities extends from a first intersection between the first transverse section and the first hemi-circular end section to a second intersection between the second transverse section and the second hemi-circular end section.