You can use your energy ray (sonic) psi-like ability to better effect.
Prerequisite: Maenad.
Benefit: Whenever you use the energy ray (sonic) ability granted by your maenad heritage, you deal an extra 1 point of damage per die. Creatures that take damage from the ray are deafened for 2d6 rounds if they fail a Fortitude save (DC 10 + ½ your HD + your Con modifier).
Normal: A sonic energy ray deals −1 point of damage per die and does not deafen its targets.
Source: Complete Psionic, page 55. Corrected the Normal entry to indicate that this only applied to energy ray (sonic).