Check if Zwicker method can be applied and raise ValueError if it can't

Ref. ISO 532-1:2017 paragraph A.3

The table A.3 giving the weights of the 1/3 band levels for
center freq. below 300 Hz is only specified for levels up to 120 dB
If one of the first 11 bands (from 25 to 250 Hz) exceed 120 dB the
Zwicker method cannot be applied.

mosqito/functions/loudness_zwicker/loudness_zwicker_shared.py

@@ -34,6 +34,15 @@ def calc_main_loudness(spec_third, field_type):
     nm :  numpy.ndarray
         Core loudness
     """
+    # Ref. ISO 532-1:2017 paragraph A.3
+    # The table A.3 giving the weights of the 1/3 band levels for
+    # center freq. below 300 Hz is only specified for levels up to 120 dB
+    # If one of the first 11 bands (from 25 to 250 Hz) exceed 120 dB the
+    # Zwicker method cannot be applied.
+    if np.max(spec_third[0:11]) > 120.0:
+        raise ValueError("1/3 octave band value exceed 120 dB, for which " +
+                         "the Zwicker method is no longer valid.")
+
     #
     # Date tables definition (variable names and description according to
     # Zwicker:1991)