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beat |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Idioms, Wikipedia, Hutchinson | 0.06 sec. |
beatIn physics, the pulsation resulting from a combination of two waves of slightly different frequency. Beat frequency is the difference between the frequencies of the combining waves. When the interfering frequencies are in the audible range, the beats are heard as alternating soft and loud pulses. The human ear can detect beats with frequencies up to 10 hertz, or 10 beats per second. Piano tuners listen for beats when comparing the pitch of a tuning fork to that of a vibrating string; when no beats are heard, the fork and string are at the same frequency. Ultrasonic or inaudible frequencies can be superimposed to produce audible beats, allowing the detection of vocal sounds produced by bats or dolphins. |
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| "If the redskins have won," he said, "they will beat the tom-tom; it is always their sign of victory. Ah, noble ship, the angel seemed to say, beat on, beat on, thou noble ship, and bear a hardy helm; for lo But if the currents carry ye to those sweet Antilles where the beaches are only beat with water-lilies, will ye do one little errand for me? |
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beat
