an audible tone
81Drone music — Stylistic origins Indian classical music Experimental music[1] Minimalist music[2] 1960s experimental rock[3] …
82Acústica musical — La acústica musical es la rama de la acústica que está especializada en: La investigación y descripción de la física de la música (es decir, cómo son los sonidos empleados para producir música). El estudio de la audición musical, encargándose de… …
83Mains hum — Spectrum of mains hum at 60 Hz Mains hum, electric hum, or power line hum is an audible oscillation of alternating current at the frequency of the mains electricity, which is usually 50 Hz or 60 Hz, depending on the local power… …
84children's literature — Body of written works produced to entertain or instruct young people. The genre encompasses a wide range of works, including acknowledged classics of world literature, picture books and easy to read stories, and fairy tales, lullabies, fables,… …
85music and dance, Oceanic — Introduction the music and dance traditions of the indigenous people of Oceania, in particular of Melanesia, Micronesia, Polynesia, New Zealand, and Australia. Music and dance in Polynesia and Micronesia are audible and visual extensions of …
86Loudspeaker measurement — is one of the most difficult aspects of audio quality measurementFact|date=March 2008, and also probably the most relevant, since loudspeakers have long been generally acknowledged to be the weak link in the audio chainFact|date=March 2008.… …
87Time signal — These automatic signal clocks were synchronized by telegraphy in 1905 before the widespread use of radio A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Contents 1 Audible… …
88Electric guitar — Fender Stratocaster String instrument Classification String instrument (plucked, either by fingerpicking, or with a pick.) …
89Pitch class — Perfect octave  Play (help· …
90Train whistle — A train whistle or air whistle, (originally referred to as a steam trumpet), is an audible signaling device on a steam locomotive used to warn that the train is approaching, and to communicate with rail workers.The older steam whistles were… …
