Lab3.markdown

@@ -108,11 +108,10 @@
 > which consecutive snaps were made with the fingers. The graph below shows the results:
 >
 > ![G1](http://gitlab.au.dk/uploads/group-22/lego/093160e740/G1.png)
-> ##### Fig. 4 Recording of a sequence of four finger snaps. The graph shows  data logged from the NXT while running
-> the SoundSampler program.
+> ##### Fig. 4 Recording of a sequence of four finger snaps. The graph shows  data logged from the NXT while running the SoundSampler program.
 >
 > The graph shows four distinct spikes in the sound level caused by the finger snapping. The spikes peak at 30-50
-> (db?) before the sound level goes back to its normal. The background noise measured is about 2-10 (db?).It is
+> dB before the sound level goes back to its normal. The background noise measured is about 2-10 dB.It is
 > interesting to note that the spikes increase faster than they fade away. This observation can be due to resonance
 > or echo from the sound waves which take some milliseconds to fade away.
 >