diff --git a/README.md b/README.md
index 7c648b3..cc5a358 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,9 @@ This mod is a continuation of NPX Team's Not So Simple Mobs. Notes from the orig
 * License for the code: `LGPLv2.1 or later`
     * see [LICENSE.txt](LICENSE.txt) and [license_notes.md](license_notes.md) for info on the license update
     * Copyright NPX Team and contributors
-* License for all the models, textures and sounds: `CC-BY-SA 4.0`, attribution "NPX Team"
+* License for all the models, textures and sounds, except those mentioned further: `CC-BY-SA 4.0`, attribution "NPX Team"
+* License for individual artistic contributions:
+    * `sounds/nssm_energy_powerup.ogg` - Tai Kedzierski, CC-BY-SA 4.0
 
 ## Dependencies
 
diff --git a/materials/energy_globes.lua b/materials/energy_globes.lua
index b1342c3..946d6d5 100644
--- a/materials/energy_globes.lua
+++ b/materials/energy_globes.lua
@@ -47,6 +47,13 @@ local function set_player_boost(user, duration, power)
     local remaining = stack_boost(user:get_player_name(), duration)
 
     minetest.chat_send_player(user:get_player_name(), "You have "..(math.floor(remaining*10)/10).."s of boost")
+
+    local userpos = user:get_pos()
+    minetest.sound_play("nssm_energy_powerup", {
+        pos = userpos,
+        max_hear_distance = 20,
+        gain = 1,
+    })
 end
 
 minetest.register_globalstep(function(dtime)
diff --git a/sounds/nssm_energy_powerup.ogg b/sounds/nssm_energy_powerup.ogg
new file mode 100644
index 0000000..3fc5702
Binary files /dev/null and b/sounds/nssm_energy_powerup.ogg differ