This paper presents results of some numerical studies of the effects of a systematic variation of manoeuvre parameters on sonic boom properties, with special attention to the focusing rays. A computer printout of ray-cone ground intercepts at equal emission time intervals forms what is herein referred to as the "acoustic lines". Regions of high pressure are recognized by a crowding of acoustic lines (high acoustic line density) implying a reduction in ray-tube cross-section area and vice versa. Numerical results give pressure signatures and peak overpressures and their variations along predicted shock- and caustic surface-ground intercepts. Manoeuvres studied include circular turn and turn entry, accelerations, pull-ups and pushovers. Finally, the effects on computed results of the fine structure of the assumed atmosphere is studied; it is found that too coarse discretization can lead to significant errors.