diff --git a/utils.py b/utils.py
index bab268fdb36927a22f535f0ccfeb43c3bb3d9059..29550eaecad2961e605657a8b9f3ace12b100927 100755
--- a/utils.py
+++ b/utils.py
@@ -109,7 +109,7 @@ def create_spectrogram(sig, directory, names, cmap, window_size=1024, overlap=.5
     fig = plt.figure()
     # plot the spectrogram
     plt.imshow(stft[::-1], aspect='auto',
-               interpolation=None, cmap=cmap, vmin=stft.mean())
+               interpolation=None, cmap=cmap) # you can add : vmin=stft.mean())
     # Remove all the borders around the plot
     plt.subplots_adjust(top=1, bottom=0, left=0, right=1)
     if names:
diff --git a/yolov5/utils/dataloaders.py b/yolov5/utils/dataloaders.py
index 358ce90df0f9948b0c3a7fdc8bccda78fa17e52e..5c351a82c068155edbbed51fb63a657a1cb1110e 100755
--- a/yolov5/utils/dataloaders.py
+++ b/yolov5/utils/dataloaders.py
@@ -291,7 +291,7 @@ class LoadSpectros:
                 hop_length=hop, window='hann')  # Compute the STFT
         stft = np.log10(np.abs(stft))
         axim = plt.imshow(stft, aspect = "auto", interpolation = None,
-                                cmap = self.cmap, vmin=np.mean(stft))
+                                cmap = self.cmap) # you can add : vmin=np.mean(stft))
         plt.subplots_adjust(top=1, bottom=0, left=0, right=1)
         im0 = axim.make_image(fig.canvas)[0][:,:,:-1][:,:,::-1]
         cv2.imwrite(path, im0)