squared, times time. 



A mode of operation called "bandwidth divisor," which has not 

 been discussed, essentially divides the ordinate scale by a frequency 

 banawidth related to the effective bandwidth. This mode is being 

 investigated with a view toward eliminating the necessity for manual 

 division, 



2. COMPUTATION OF MEAN TOTAL ENERGY 



The total energy in the spectrum $ , which yields important 

 statistical information on the amplitude distribution of the event 

 being studied, is defined by the area under the spectral density 

 curve as 



I 



*( OD ) dcD [8]. 



o e' e ■■ •• 



One obvious method of calculating $ is by measuring the area bounded 



by $ (do ) and the abscissa scale. Another less troublesome, 

 e 



more accurate method was mentioned in the section DATA ANALYSIS (page 

 8) as"integral of energy" where the operation described in Equation [8 ] 

 is performed in the analog computer of the SEADAC. Such an integration 

 appears in Figure 9 where the integrated spectrum is superimposed 

 jn the spectral density curve derived from the same data. Examination 

 of this cumulative representation of the spectrum shows that it is 

 steep when the spectral density curve is steep (upward), has inflection 

 points where the spectral density curve has peaks, and becomes 

 asymptotic to a constant as the spectral density function goes to zero. 



23 



