diff --git a/egs/librispeech/ASR/.conv_feat_vis.py.swp b/egs/librispeech/ASR/.conv_feat_vis.py.swp
index a180021c6..bcc903d37 100644
Binary files a/egs/librispeech/ASR/.conv_feat_vis.py.swp and b/egs/librispeech/ASR/.conv_feat_vis.py.swp differ
diff --git a/egs/librispeech/ASR/conv_feat_vis.py b/egs/librispeech/ASR/conv_feat_vis.py
index 68b5b665a..efe5a9d87 100644
--- a/egs/librispeech/ASR/conv_feat_vis.py
+++ b/egs/librispeech/ASR/conv_feat_vis.py
@@ -2,25 +2,27 @@ from glob import glob
 import numpy as np
 import matplotlib.pyplot as plt
 
-feats = []
-feat_list = glob('./conv_feat/*.npy')
-for feat in feat_list:
-    feat = np.load(feat)
-    feats.append(feat)
+spk_list = glob('./conv_feat/*')
+for spk in spk_list:
+    feats = []
+    feat_list = glob(f'{spk}/*.npy')
+    for feat in feat_list:
+        feat = np.load(feat)
+        feats.append(feat)
 
-feats_all = feats[0]
-for feat in feats:
-    feats_all = np.concatenate([feats_all, feat])
+    feats_all = feats[0]
+    for feat in feats:
+        feats_all = np.concatenate([feats_all, feat])
 
-feats_all = feats_all.transpose(1,0)
+    feats_all = feats_all.transpose(1,0)
 
-for i in range(512):
-    mean = feats_all[i].mean()
-    std = feats_all[i].std()
-    print(mean, std)
-'''
-for i in range(512):
-    plt.hist(feats_all[i], bins=500)
-    plt.savefig(f'./conv_feat/dim_{i}.pdf')
-    plt.close()
-'''
+    for i in range(512):
+        mean = feats_all[i].mean()
+        std = feats_all[i].std()
+        print(mean, std)
+    '''
+    for i in range(512):
+        plt.hist(feats_all[i], bins=500)
+        plt.savefig(f'./conv_feat/dim_{i}.pdf')
+        plt.close()
+    '''