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Chimes, the sounds produced by a striking clock to announce the hours; Bar chimes (also known as "mark tree"), a series of many small chimes of decreasing length, arranged horizontally; Chime bars, individual instruments similar to glockenspiel bars but with resonators; Macintosh startup chime, the sound a Macintosh computer makes on startup
Eight-bell chime in its frame (McShane Bell Foundry, Maryland).Note that the bottom bells are static-chimes, and the top bell is also hung for swing-chiming on its own. A chime (/ ˈ t ʃ aɪ m /) or set of chimes is a carillon-like instrument, i.e. a pitched percussion instrument consisting of 22 or fewer bells.
In some schools it may take the form of a physical bell, usually electrically operated. In other schools it may be a tone, siren, electronic bell sound, a series of chimes, or music played over a PA system. [1] In East Asian nations such as China, North Korea and South Korea, the Westminster Chimes pattern is commonly played as the bell. [2]
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A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.
Voice evacuation systems (also called Voice Alarm Systems) have become popular in most countries. Voice evacuation alarms typically are not as loud as horns or bells (although generally standards require the same minimum sound pressure levels), and usually sound an alarm tone (typically a slow whoop, code-3, or chime tone, although this depends ...
Spectrum of an FM broadcast signal. The pilot tone is the orange vertical line on the right of the spectrogram. In FM stereo broadcasting, a pilot tone of 19 kHz indicates that there is stereophonic information at 38 kHz (the second harmonic of the pilot tone). The receiver doubles the frequency of the pilot tone and uses it as a frequency and ...