snr change

datahandler.py

@@ -17,10 +17,10 @@ class AudioMixer(object):
     def __init__(
         self, 
         sample_rate=16000, 
-        mean_snr=-3, 
-        var_snr=25, 
-        mean_loudness=-2, 
-        var_loudness=15
+        mean_snr=-2, 
+        var_snr=15, 
+        mean_loudness=-24, 
+        var_loudness=20
     ):
 
         self.sample_rate = sample_rate