chirp Valentine's Day with bird saying out love heart

entine Dyall (7 May 1908–24 June 1985) was a British actor, known for many years as "The Man in Black", narrator of the BBC Radio horror series Appointment With Fear.Dyall also made guest appearances in several episodes of The Goon Show, parodying his familiar radio persona.He later appeared in the radio version of The Hitchhiker's Guide to the Galaxy playing Gargravarr (appropriately, a disembodied voice), and on the television and LP versions, where he played the voice of the computer Deep Thought. See more at Wikipedia.org...

>For the characteristic sounds of birds, see bird song. For that of crickets, see stridulation. A chirp is a signal in which the frequency increases ('up-chirp') or decreases ('down-chirp') with time. It is commonly used in sonar and radar, but has other applications, such as in spread spectrum communications. In spread spectrum usage, SAW devices such as RACs are often used to generate and demodulate the chirped signals. In optics, ultrashort laser pulses also exhibit chirp due to the dispersion of the materials they propagate through. See more at Wikipedia.org...