diff --git a/main.js b/main.js
index a3a2530..2fb5b46 100644
--- a/main.js
+++ b/main.js
@@ -414,10 +414,19 @@ document.addEventListener( 'keyup', ( event ) => {
 container.addEventListener( 'mousedown', () => {
 
     document.body.requestPointerLock();
-    ambiance.play()
 
 } );
 
+function lockChangeAlert() {
+  if (document.pointerLockElement === document.body) {
+    ambiance.play()
+  } else {
+    ambiance.pause()
+  }
+}
+
+document.addEventListener("pointerlockchange", lockChangeAlert, false);
+
 document.body.addEventListener( 'mousemove', ( event ) => {
 
     if ( document.pointerLockElement === document.body ) {