However, c can easily be estimated on the basis of the frequency v _ { 1 } of mode ( 0, 1 ), the lowest of all ( basic frequency ), taking into account that R _ { 0, 1 } = 2.405:
12.
To add intonation for speech i . e . prosody data are necessary ( e . g . stress of syllable, falling or rising pitch of basic frequency, pause, etc . ) and other information, which allows to synthesize more human, non-monotonous speech.
13.
For each of the three systems there is an epicyclic gear whose axis is mounted on b1, thus the basic frequency is the Earth year ( as it is, in truth, for epicyclic motion in the sun and all the planets excepting only the moon ).
