NOTATION 



A Area under SEADAC calibration curve 



A Amplitude of carrier signal 



A Amplitude of modulating signal 

 m 



a Instantaneous value of modulated signal 



a Instantaneous value of carrier signal 

 c 



a Instantaneous value of modulating signal 

 m 



C„ Transducer calibration 

 T 



f Number of degrees of freedom (=2TAf ) 



f Analysis frequency 



f True frequency 



k Ratio of any analysis frequency band to its length 

 on the abscissa scale of the X-Y plot 



k Proportionality factor 



L Height of calibration curve 



L Maximum height of cumulative energy distribution 



1 



L Maximum height of cumulative energy distribution 



^ calibration 



m Modulation index 

 a 



S Frequency multiplication factor 



s.j- Recording speed 



s Playback speed 

 P 



T Length of time required for tape loop to make one complete 

 passage in the loop recorder 



T Period of encounter 

 e 



t Time 



iv 



