diff --git a/notes/time_report.md b/notes/time_report.md
index f228521..2fed492 100644
--- a/notes/time_report.md
+++ b/notes/time_report.md
@@ -54,3 +54,5 @@
 * Work more on introduction
 * Prepare tables for requirements
 * Add screenshots and data of Android CPU measurements
+* Record visualisation of speaker vibration using a laser pointer
+  * https://www.youtube.com/watch?v=NtZQGxkwJCM