Update class_names.txt

class_names.txt

@@ -0,0 +1,25 @@
+[couhging]
+[cough]
+[sneezing]
+[sneeze]
+[sigh]
+[sighing]
+[slurp]
+[slurping]
+[breathing]
+[heavy breathing]
+[breathing heavily]
+[chewing]
+[smacking]
+[smack]
+[sniffing]
+[sniffling]
+[sniffle]
+[mouth sounds]
+[mouth noises]
+[popping]
+[pop]
+[cracking]
+[crack]
+[yawning]
+[yawn]