added sound for balloon hitting sweater, see #484

js/balloons-and-static-electricity/view/BalloonNode.js

@@ -30,6 +30,7 @@ import soundManager from '../../../../tambo/js/soundManager.js';
 import Utterance from '../../../../utterance-queue/js/Utterance.js';
 import grabBalloonSound from '../../../sounds/balloon-grab-004_mp3.js';
 import releaseBalloonSound from '../../../sounds/balloon-release-004_mp3.js';
+import balloonHitsSweaterSound from '../../../sounds/balloon-hit-sweater_mp3.js';
 import balloonsAndStaticElectricity from '../../balloonsAndStaticElectricity.js';
 import BASEA11yStrings from '../BASEA11yStrings.js';
 import BASEQueryParameters from '../BASEQueryParameters.js';
@@ -219,6 +220,17 @@ class BalloonNode extends Node {
       new BalloonRubbingSoundGenerator( model.dragVelocityProperty, model.onSweaterProperty, model.touchingWallProperty )
     );
 
+    // sound generation for when the balloon contacts the sweater
+    const balloonHitsSweaterSoundClip = new SoundClip( balloonHitsSweaterSound, {
+      initialOutputLevel: 0.1
+    } );
+    soundManager.addSoundGenerator( balloonHitsSweaterSoundClip );
+    model.onSweaterProperty.link( onSweater => {
+      if ( onSweater && !model.isDraggedProperty.value ) {
+        balloonHitsSweaterSoundClip.play();
+      }
+    } );
+
     // pdom
     balloonImageNode.focusHighlight = new FocusHighlightFromNode( balloonImageNode );
 

sounds/license.json

@@ -7,6 +7,14 @@
     "license": "contact [email protected]",
     "notes": "created by Ashton Morris (PhET Interactive Simulations)"
   },
+  "balloon-hit-sweater.mp3": {
+    "text": [
+      "Copyright 2002-2020 University of Colorado Boulder"
+    ],
+    "projectURL": "http://phet.colorado.edu",
+    "license": "contact [email protected]",
+    "notes": "created by Ashton Morris (PhET Interactive Simulations)"
+  },
   "balloon-release-004.mp3": {
     "text": [
       "Copyright 2002-2020 University of Colorado Boulder"