This chapter traces how revenge tragedy took shape on the early modern stage, outlining the model of violent, invasive hearing on which the genre would increasingly depend. Many late-sixteenth century plays delight in sonic excess, combining cannon fire, trumpets, and alarums with the rumbling thunder of bombastic speech. In these productions, loud noises are often associated with violence, and particularly vengeance. Revenge is said to ‘thunder’ into bodies, or to ‘shriek’ and ‘cry’ out; noise itself becomes a weapon. Contemporary anatomy texts support such thinking, as do early modern theories of theatrical influence and effects. Increasingly, revengers’ speeches become weapons to be wielded precisely -- that is, directly into the ears of specific, intended victims --rather than released indiscriminately into crowds of hearers. Through Kyd’s The Spanish Tragedy andShakespeare’s 3 Henry VI and Titus Andronicus, this chapter argues that revenge tragedy is intimately bound up in thinking about what sound can do to listeners both on and off the stage. The theatrical form proves explicitly invested in the question of what it means to hear plays in performance.