%    start time	      end time	      duration	      low freq	     high freq	
        411.863	        411.869	          0.007	       3104.384	      47627.594	
        418.897	        418.905	          0.008	       3187.141	      47048.296	
        459.524	        459.530	          0.006	       3518.168	      45393.158	
        459.713	        459.717	          0.004	       4759.522	      24372.906	
        459.971	        459.977	          0.006	       6249.146	      46965.539	
        460.727	        460.733	          0.007	      23628.094	      47131.053	
        472.473	        472.480	          0.007	       3683.682	      47131.053	
        513.879	        513.885	          0.007	       7159.472	      47793.108	
        528.635	        528.640	          0.005	       6580.173	      37779.523	
        554.998	        555.003	          0.005	       8069.797	      41255.313	
        578.946	        578.954	          0.008	       2938.870	      35379.573