an audible tone
31Family Radio Service — The Family Radio Service (FRS) is an improved walkie talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies in the ultra high frequency (UHF) band. It does not suffer the… …
32History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
33Shaping (psychology) — The differential reinforcement of successive approximations, or more commonly, shaping is a conditioning procedure used primarily in the experimental analysis of behavior. It was introduced by B.F. Skinner… …
34Microsecond — A microsecond is an SI unit of time equal to one millionth (10−6) of a second. Its symbol is µs. A microsecond is equal to 1000 nanoseconds or 1/1000 millisecond. Because the next SI unit is 1000 times larger, measurements of 10−5 and 10−4… …
35Fencing — This article is about the sport, which is distinguished from stage fencing, academic fencing (mensur), historical fencing, SCA fencing, and swordsmanship. For the boundary structure, see Fence. For other uses, see Fencing (disambiguation).… …
361 E-2 s — To help compare orders of magnitude of different times this page lists times between 10−2 seconds and 10−1 seconds (10 milliseconds to 100 milliseconds). See also times of other orders of magnitude.*shorter times *10 milliseconds (10 ms) ndash;… …
37Millisecond — Horizontal logarithmic scale marked with units of time A millisecond (from milli and second; abbreviation: ms) is a thousandth (1/1,000) of a second.[1] 10 milliseconds (a hundredth of a secon …
381 E-5 s — To help compare orders of magnitude of different times this page lists times between 10−5 seconds and 10−4 seconds (10 microseconds to 100 microseconds). See also times of other orders of magnitude.* shorter times * 10 microseconds (μs) ndash;… …
39Low-frequency oscillation — The term low frequency oscillation (LFO) is an audio signal usually below 20 Hz which creates a pulsating rhythm rather than an audible tone. LFO predominantly refers to an audio technique specifically used in the production of electronic music.… …
40Eddie Timanus — (born 1969 in Kansas City, Missouri) is a Jeopardy! champion and USA Today sportswriter who grew up in Reston, Virginia then graduated from Wake Forest University. He met his wife through a Yahoo! Groups discussion group on game shows; the couple …
