Chirp
A chirp is a signal in which the frequency increases (up-chirp) or decreases (down-chirp) with time. In some sources, the term chirp is used interchangeably with sweep signal. It is commonly used in sonar, radar, and laser, but has other applications, such as in spread-spectrum communications.
In spread-spectrum usage, surface acoustic wave (SAW) devices such as reflective array compressors (RACs) are often used to generate and demodulate the chirped signals. In optics, ultrashort laser pulses also exhibit chirp, which, in optical transmission systems, interacts with the dispersion properties of the materials, increasing or decreasing total pulse dispersion as the signal propagates. The name is a reference to the chirping sound made by birds; see bird vocalization.
Chirp (noun)
A short, sharp or high note or noise, as of a bird or insect.
Chirp (noun)
A pulse of signal whose frequency sweeps through a band of frequencies for the duration of the pulse.
Chirp (verb)
to make a short, sharp, cheerful note, as of small birds or crickets
Chirp (verb)
to speak in a high-pitched staccato
Chirp (verb)
To modify (a pulse of signal) so that it sweeps through a band of frequencies throughout its duration.
Chirrup (verb)
To make a series of chirps, clicks or clucks.
Chirrup (verb)
To express by chirping.
“The crickets chirruped their song.”
Chirrup (verb)
To quicken or animate by chirping.
“to chirrup a horse”
Chirrup (noun)
A series of chirps, clicks or clucks.
Chirp (verb)
(of a small bird or an insect) make a short, sharp, high-pitched sound
“outside, the crickets chirped monotonously”
“the chirping of birds”
Chirp (verb)
(of a person) say something in a lively and cheerful way
“‘Good morning!’ chirped Alex”
Chirp (verb)
speak to (someone) in a taunting way
“he chirped two policemen just before he was arrested”
Chirp (noun)
a short, sharp, high-pitched sound
“the chirps and whirrs of insects”
Chirrup (verb)
(of a small bird) make repeated short, high-pitched sounds
“a bird chirruped intermittently outside”
Chirrup (verb)
(of a person) say something in a high-pitched voice
“‘Yes, Miss Honey,’ chirruped eighteen voices”
Chirrup (noun)
a short, high-pitched sound
“the chirrups of the crickets”