Beat

  • physics: beat is the perception of the sum of two close frequencies as one frequency that oscillates between zero intensity and full intensity, caused by the alternating constructive and destructive interference. Beating is heard as a pulsation in loudness of two close frequencies, and , at the rate of . Thus at the unison and as the difference between and increases, the speed decreases till beyond a certain proximity beating stops and a roughness is heard instead, after which the two pitches are perceived as separate. The composer Alvin Lucier has written many pieces which feature interference beats as their main focus. Musicians may used interferance beats to objectively check tuning at the unison or other simple intervalss.

  • music: beat (music) is any of the periodic transient signals in music that mark the rhythm.
The beat can also mean solely the bass and snare drums of the rhythm. DJs often beatmatch the songs that they play.
Interference beats are used in tuning, see tuning and physics above.



In the News

Hurricane Katrina Images
"The imagery posted on this site is of the Gulf coast of Louisiana, Mississippi and Alabama after Hurricane Katrina made landfall. This imagery was acquired by the NOAA Remote Sensing Division to support NOAA national security and emergency response requirements."Aerial photos are accessible through an interactive map. From the National Oceanic and Atmospheric Administration (NOAA).

Hackers Fight Authority in NYC
The Man keeping you down? The sixth-annual Hackers on Planet Earth conference doles out briefings on picking locks, jamming phones and beating wiretaps. There was only one arrest. Annalee Newitz reports from New York.

Gendered Age Differences Expected Among Oscar Nominees
If the women who are nominated for Academy Awards next Tuesday tend to be younger than the male nominees, it's more likely to be a reflection of the length of their film acting experience than gendered age discrimination, according to a Rice University sociologist who has compared more than seven decades' worth of statistics on Oscar nominees.

High-Def DVD Crackers Lie Low
A company that sells ripping software for high-definition disks operates through a corporate maze reaching from Ireland to Antigua. Good luck, MPAA. In 27B Stroke 6.

[Ironic] Professional beggars prowling about the streets of Moroccan c
The government plans to crack down on the scam used by faux beggars in growing numbers for a kind of "emotional blackmail", a cabinet minister was quoted as saying...

Drug Combination Effective For Multiple Myeloma
Two international clinical trials show unprecedented survival for patients with myeloma, a cancer the blood-making cells of bone marrow. Findings show that with the oral drug lenalidomide, in combination with dexamethasone, patients significantly improved by all measures where previous treatments had failed -- including a median survival of nearly three years -- the longest median survival known for this difficult to treat patient group.

Ultra-cold Temperature Physics Opens Way To Understanding And Applicat
Researchers doing ultra-cold temperature physics may not have to wear parkas, but they are producing the coldest temperatures ever and exploring model quantum systems that might lead to more accurate clocks and gyroscopes, quantum computers and communications as well as a better understanding of quantum physics phenomena.

[Scary] Pregnant woman says 'maternal instinct' helped her kill attack
FORT MITCHELL, Ky. - A pregnant woman who killed her attacker said a maternal instinct helped her fight off the woman who investigators believe was after her unborn child."I do believe that I fought harder because it was for my child,"Sarah Brady told ABC's "Good Morning America"in interviews aired Sunday and Monday. "It is a maternal instinct to protect your child to the very end."Katherine Smith, 22, died Thursday after luring Brady to her apartment to pick up a package supposedly delivered to the wrong address. When Smith pulled out a knife and attacked the pregnant woman, Brady fought back, striking Smith on the head with an ash tray and stabbing her three times with her own knife, police said. Brady, 26, said she didn't know Smith before the two met at Smith's apartment and can't be certain why Smith wanted to kill her."I really am not sure what was going through her mind,"Brady told ABC. "The only thing I thought was that she was going to kill me and my child and that is the only thing that ran through my mind."

In 'Spontaneous'Liver Cancer, Researcher Sees A Cure
Adding more good news to the recent announcement that NexavarŽ(sorafenib) may be the first effective treatment for advanced liver cancer, researchers have uncovered a new molecular mechanism that may "spontaneously"cause liver cancer.

Suzaku catches retreat of a black hole's disk
Studies of one of the galaxy's most active black-hole binaries reveal a dramatic change that will help scientists better understand how these systems expel fast-moving particle jets.




MP3 Music Downloads

Preview songs, Download Free Music,Burn CDs at ITunes.com
iTunes_RGB_9mm

 


Google




InformationQuickFind.com - Find Information Fast

Links | Privacy Policy | News |