%    start time	      end time	      duration	      low freq	     high freq	
         19.986	         19.992	          0.006	       5752.604	      47462.080	
         73.764	         73.770	          0.006	       4759.522	      47710.351	
         81.885	         81.892	          0.007	       2690.599	      47296.566	
        106.885	        106.895	          0.010	       3600.925	      46882.782	
        128.486	        128.492	          0.006	       4594.008	      47710.351	
        168.313	        168.317	          0.004	      16097.216	      47213.809	
        181.802	        181.809	          0.006	       2442.328	      47544.837	
        234.907	        234.914	          0.007	       4842.278	      47544.837
        236.411	        236.418	          0.007	       3931.953	      46303.484	
        287.510	        287.517	          0.007	       5669.847	      47213.809	
        390.857	        390.862	          0.005	       3931.953	      47710.351	
        442.080	        442.086	          0.007	       4594.008	      47627.594