beat

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beat

1. Physics the low regular frequency produced by combining two sounds or electrical signals that have similar frequencies
2. Prosody the accent, stress, or ictus in a metrical foot
3. Nautical a course that steers a sailing vessel as close as possible to the direction from which the wind is blowing
4. 
a. the act of scouring for game by beating
b. the organized scouring of a particular woodland so as to rouse the game in it
c. the woodland where game is so roused
5. Fencing a sharp tap with one's blade on an opponent's blade to deflect it

Beat

A variation in the intensity of a composite wave which is formed from two distinct waves with different frequencies. Beats were first observed in sound waves, such as those produced by two tuning forks with different frequencies. Beats also can be produced by other waves. They can occur in the motion of two pendulums of different lengths and have been observed among the different-frequency phonons in a crystal lattice.

One important application of beat phenomena is to use one object with an accurately known frequency to determine the unknown frequency of another such object. The beat-frequency or heterodyne oscillator also operates by producing beats from two frequencies.

beat

[bēt]
(physics)
The periodic variation in amplitude of a wave that is the superposition of two simple harmonic waves of different frequencies.

beat

i. A low-frequency vibration produced when two sources of vibration act on the same object at the same time. For example, in a multiengine airplane, if two engines have slightly different RPM, airframe vibrations produced by these engines will produce a very noticeable beat.
ii. When two waves are combined or superimposed, a beat occurs if two frequencies are not the same. Waves beat together to create the appearance of either a change in amplitude, if the frequencies differ by a few hertz (Hz), or new frequencies, called beat frequencies or heterodynes, if the original frequencies are far apart.
References in periodicals archive ?
Its storyline, portrays the fictional life of anti-hero, Pink, who is beaten down by society.
And then there are the animals themselves--the foursome from the Grimm tale, who, though beaten down, are able to talk and plan and to outwit men, and the camel, a fantastical creature to a northern child.
I WEAR THE BLACK FOR THE POOR AND THE BEATEN DOWN LIVING IN THE HOPELESS, HUNGRY SIDE OF TOWN ...
* "I wear the black for the poor and the beaten down, livin' in the hopeless, hungry side of town," sang country star Johnny Cash, explaining his dark taste in clothes.
One of the things that undoubtedly happen to those who get buffeted by the slings and arrows of daily life is that goals and the necessary tenacity get somewhat beaten down. And while it would be a laudable thing to act like a leader, that consequently gets diverted, as well.
"This city has always been a magnet for people who have been beaten down, and abused, "said the 56-year-old mental health services coordinator for the San Francisco health department.
"Although utilities have been beaten down and are also suffering in this interest rate environment, this is actually a backdoor Internet play," says Paige.
In the character of Sera, we have a woman who is beaten down, and beaten up, daily, by the world she lives in and the men who control it.