beat


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Wikipedia.

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 ?
Girls' Team Under-18: Sindh beat Punjab 3-0, KPK beat Chromatex 3-0.
In boys and girls U-10 singles quarterfinals, Hamza Roman (SNGPL) beat Mahnoor Farooqi 4-0, 4-0; Amir Mazari beat Abdul Rehman 4-0, 4-1; Hania Minhas beat M Haziq 4-1, 4-1 and Nabeel got w/o against Hamza Ali Rizwan.
Mixed Doubles Pre Quarter Finals, Zunnain Javed and Mehmoona Ameer (Wapda) beat Ammar Masood and Khadija (Punjab) by 21-7, 24-22, Shahmeer Iftikhar and Javeria Tahir (SNGPL) beat Ali Chishti and Yasmeen (Islamabad)
Ali Rauf-Saeed beat Zain Khan-Hassan Zaib 21-16; Ozair-Zohaib beat Iftikhar Hussain-Moiz 21-11; Uaakeph-Hayyan beat Hafiz Nadeem-Salman 21-17; Asim-Bilal Musadaq beat Shahood-Tariq 21-6; Mujtaba Hassan-Danyaal Ali beat Yousaf-Zohaib 21-16; Usman-Ali (New Khan) beat Imran-Maaz Ali 23-21; Imran-Akbar Jr.
19-Nikoloz Basilashvili beat Stefano Travaglia (ITA) 3-6 6-3 3-6 6-4
Decatur MacArthur (6-2) beat Decatur Eisenhower 61-14.
The CP Beats Store is launching with a combined total of over 100 free beats, lease beats and exclusive beats.
Group four: Akshay Pabary beat Dean Eadington, beat Dean Richardson, Dean Edington beat Dean Richardson.
1991 (Britain, Ireland and France) Pool: Lost to New Zealand 18-12; beat Italy 36-6; beat USA 37-9.
Pool - lost to New Zealand 18-12, beat Italy 36-6, beat USA 37-9.
L Morton (Tulliallan) beat J Issler (Germany) 2 holes.