the lowest tone of a harmonic series

(electronics) a graph of frequency response with signal amplitude or gain plotted against frequency

serving as an essential component

being or involving basic facts or principles

far-reaching and thoroughgoing in effect especially on the nature of something

the lowest tone of a harmonic series

the number of occurrences within a given time period

the ratio of the number of observations in a statistical category to the total number of observations

the number of observations in a given statistical category