Lab3.markdown

@@ -193,6 +193,8 @@
 > The program ClapCar.java is familiar with the clap sound profile and once a clap is detected the robot will play a
 > sound (see video).
 >
+> [![image alt text](http://img.youtube.com/vi/UMSrPEmQrwE/0.jpg)](http://www.youtube.com/watch?v=UMSrPEmQrwE) 
+>
 >```
 > while (!Button.ESCAPE.isDown()) {
 >			soundLevel = sound.readValue();
@@ -219,8 +221,12 @@
 >			Thread.sleep(5);
 >		}
 >```
+> Fig. ??: Inner loop of the ClapCar program.
 >
-> [![image alt text](http://img.youtube.com/vi/UMSrPEmQrwE/0.jpg)](http://www.youtube.com/watch?v=UMSrPEmQrwE)
+> ![G3](http://gitlab.au.dk/uploads/group-22/lego/8b5ba5b544/G3.png)
+> Fig. ??: Graph showing the profile of a single clap of sound level over time.
+>
+> We noticed that it is possible to trick the robot into thinking it hears a clap by shouting a short word to the sound sensor. This is due to the fact that the robot only distinguishes between volume and duration of a sound meaning that different sounds can actually result in the same sound profile. The graph below [fig. ??] shows a series of claps showing three distinct peaks. Each peak is a registered clap. The smaller peaks will not result in a beep as the sound profile does not match that of a clap. 
 >
 > ---
 > ## Exercise 6 - Party Finder Robot