frequency
2 ResultsDictionary
frequency
The number of oscillations (vibrations) in one second. Frequency is measured in Hertz (Hz), which is the same as "oscillations per second" or "cycles per second." For example, the alternating...
Dictionary
Definition: frequency
The number of oscillations (vibrations) in one second. Frequency is measured in Hertz (Hz), which is the same as "oscillations per second" or "cycles per second." For example, the alternating current in a wall outlet in the U.S. and Canada is 60Hz. Electromagnetic radiation is measured in kiloHertz (kHz), megahertz (MHz) and gigahertz (GHz). See wavelength, frequency response, audio, carrier and space/time.
Frequency
The frequency is the number of oscillations per second. The higher the frequency (the closer the ripples would be in this diagram) and the shorter the wavelength.
THIS DEFINITION IS FOR PERSONAL USE ONLY
All other reproduction is strictly prohibited without permission from the publisher.
© 1981-2010 The Computer Language Company Inc. All rights reserved.
Sponsored White Papers, Webcasts & Resources
-
Live Webcast: Top Considerations for Effective Managed Security for 2012 and Beyond
Register for this webcast, Top Considerations for Effective Managed Security for 2012 and Beyond, to learn more about what you can do to keep your network protected for years to come.
-
Inside the MBAN frequency battle
"Imagine your cordless phone at home – you do not need to spend any time or cost managing the spectrum for the phone – we aim to the same for MBANs (Medical Body Area Networks)," a Philips...
-
FCC may set aside free wireless spectrum for Internet broadband
FCC may look at some wireless spectrum being set aside for at little or no cost for anyone's use.
Additional Results
-
Chart: Mobile OS update frequency (spoiler: iOS trounces)
iSmashiPhone charted the major mobile operating systems by their update schedule, and not surprisingly, iOS beat the rest of the pack quite handily.
-
Inside the MBAN frequency battle
"Imagine your cordless phone at home – you do not need to spend any time or cost managing the spectrum for the phone – we aim to the same for MBANs (Medical Body Area Networks)," a Philips...
-
Body networks ask what is the frequency
Paul Coss of Philips insists the frequency is necessary. WiFi spectrum is already heavily-used in hospitals, he said, and dedicated spectrum is needed for life-critical information.
-
FCC may set aside free wireless spectrum for Internet broadband
FCC may look at some wireless spectrum being set aside for at little or no cost for anyone's use.
-
'Microring' wireless devices could nix wires in homes, offices
Purdue University researchers have developed a system capable of converting ultra fast laser pulses into bursts of radio-frequency signals using "microring resonators." The technology could apply...
-
Attackers could steal crypto keys from mobile devices
Security researchers have discovered a way to steal cryptographic keys that are used to encrypt communications and authenticate users on mobile devices.
-
FAQ: The 411 on radio frequency interference
Ever wonder what causes that annoying "buzz" from a speaker? It's called radio frequency interference.
-
Photos: RFID robots
Bots that use radio frequency to scare away intruders may become widely used in the future.
-
Photos: RFID traffic reducer
In Stockholm, Sweden, drivers have been testing an IBM system of radio frequency transponders and roadside cameras.
-
Photos: RFID traffic reducer
In Stockholm, Sweden, drivers have been testing an IBM system of radio frequency transponders and roadside cameras.
-
Photos: RFID robots
Bots that use radio frequency to scare away intruders may become widely used in the future.
-
IBM and Sun Put Radio Frequency ID to Test On Their Own Turfs
Vendors with RFID solutions are eagerly anticipating the day when they can publicly point to customer deployments. In the interim, IBM and Sun have released details of their internal RFID...
-
Next-Generation WLANs: Why the RF Matters
Wireless local-area networks (WLANs) based on the IEEE 802.11 series of standards have emerged as one of the most exciting communication technologies currently available to enterprises. As the...
-
The 802.11 Semiconductor Market Gets Tougher
The 802.11 wireless technology market continues to boom, but the shakeout continues to escalate as smaller firms restructure or disappear while big ones muscle in — meanwhile, the technology bar...
-
IBM calls on micro-machines
IBM has developed microscopic machines or MEMS that could be used to increase the performance and battery life of wireless devices such as cellular phones.
-
Net radio network loses frequency
Fans of Live365 are forced to groove elsewhere after the popular Net radio portal is temporarily shut down.
-
Net radio losing frequency
Even as its audience grows by leaps and bounds, the Internet music industry is facing a swift contraction that is causing numerous companies to curtail their services or close outright.
The best of ZDNet, delivered
ZDNet Newsletters
Get the best of ZDNet delivered straight to your inbox
