docs: def intersect(self, other):
          """
          Return the intersection between this frequency band and another.
  
          Args:
              other (FrequencyBand): the instance to intersect with
  
          Examples::
              >>> import zounds
              >>> b1 = zounds.FrequencyBand(500, 1000)
              >>> b2 = zounds.FrequencyBand(900, 2000)
              >>> intersection = b1.intersect(b2)
              >>> intersection.start_hz, intersection.stop_hz
              (900, 1000)
          """
          lowest_stop = min(self.stop_hz, other.stop_hz)
          highest_start = max(self.start_hz, other.start_hz)
          return FrequencyBand(highest_start, lowest_stop)