Chirping

v. utter the short sharp sound of a bird, peep, twitter; chirp like a cricket

In telecommunication, the term chirping has the following meanings: 1. The rapid changing, as opposed to long-term drifting, of the frequency of an electromagnetic wave. Chirping is most often observed in pulsed operation of a source. 2. A pulse compression technique that uses (usually linear) frequency modulation during the pulse.
See more at Wikipedia.org...

Noun
1. a sharp sound made by small birds or insects
(hypernym) sound
(hyponym) tweet
(derivation) tweedle
Verb
1. make high-pitched sounds; of birds
(synonym) peep, twirp, cheep, chirrup
(hypernym) utter, emit, let out, let loose
(hyponym) chitter, twitter
2. sing in modulation
(synonym) tweedle
(hypernym) sing
(classification) music

(p. pr. & vb. n.)
of Chirp
  

(a.)
Cheering; enlivening.
  

1. The rapid changing, as opposed to long-term drifting, of the frequency of an electromagnetic wave. Note: Chirping is most often observed in pulsed operation of a source. 2. A pulse compression technique that uses (usually linear) frequency modulation during the pulse.