diff --git a/assets/sounds/emitter-off.wav b/assets/sounds/emitter-off.wav
new file mode 100644
index 0000000..3c1d30f
Binary files /dev/null and b/assets/sounds/emitter-off.wav differ
diff --git a/assets/sounds/emitter-on.wav b/assets/sounds/emitter-on.wav
new file mode 100644
index 0000000..c6c0fdc
Binary files /dev/null and b/assets/sounds/emitter-on.wav differ
diff --git a/game.scm b/game.scm
index 8b9097e..a59845d 100644
--- a/game.scm
+++ b/game.scm
@@ -70,6 +70,8 @@
 (define audio:exit (load-sound-effect "exit"))
 (define audio:pickup (load-sound-effect "pickup"))
 (define audio:emit (load-sound-effect "emit"))
+(define audio:emitter-on (load-sound-effect "emitter-on"))
+(define audio:emitter-off (load-sound-effect "emitter-off"))
 (define audio:die (load-sound-effect "die"))
 (define audio:gate (load-sound-effect "gate"))
 (define audio:warp (load-sound-effect "warp"))
@@ -258,6 +260,10 @@
                  (set! *gems* (cons *level-idx* *gems*)))
                 (('emit x y)
                  (play-sound-effect audio:emit))
+                (('emitter-on x y)
+                 (play-sound-effect audio:emitter-on))
+                (('emitter-off x y)
+                 (play-sound-effect audio:emitter-off))
                 (('gate-open x y)
                  (play-sound-effect audio:gate))
                 (('gate-close x y)
diff --git a/modules/game/actors.scm b/modules/game/actors.scm
index b65b653..07d507e 100644
--- a/modules/game/actors.scm
+++ b/modules/game/actors.scm
@@ -161,8 +161,11 @@
     (('exit obj grid-info) #f)
     (('activate grid-info)
      ($ on? #t)
-     ($ timer 0))
-    (('deactivate grid-info) ($ on? #f))
+     ($ timer 0)
+     ($ grid-info 'append-event `(emitter-on ,x ,y)))
+    (('deactivate grid-info)
+     ($ on? #f)
+     ($ grid-info 'append-event `(emitter-off ,x ,y)))
     (('wire-state grid-info)
      (when ($ on?)
        (let ((t ($ timer)))