Cutoff Frequency Filters

Technology / Home Audio / Cutoff Frequency Filters: The frequency at which a signal falls off by 3 db (the half power point) from it's maximum value. Also referred to as the -3 db points, or the corner frequencies

Machine-Learning Filters

Technology / Email / Machine-Learning Filters: Filters run by machines that determine whether to block email based on algorithms that point to whether the message is likely spam. MORE

Low Frequency

Technology / Home Audio / Low Frequency: Refers to radio frequencies within the 30-300 khz band. In audio it usually refers to frequencies in the 20-160 Hz band. MORE

Pulse Repetition Frequency (PRF)

Technology / Radar / Pulse Repetition Frequency (PRF): The number of radar pulses transmitted each second. The pulse transmission rate is automatically lengthened for longer ranges. MORE

Radio Frequency (RF)

Technology / Cell Phones / Radio Frequency (RF): The spectrum of electromagnetic energy between audio and light: 500 KHz to 300 GHz. MORE

Radio Frequency Identification (RFID)

Technology / Computers / Radio Frequency Identification (RFID): RFID first appeared in tracking and access applications during the 1980s. It is a method of remotely storing and retrieving data using devices called RFID tags/transponders and is coming into increasi MORE

Inverse Document Frequency (IDF)

Business / Search Engine Optimization (SEO) / Inverse Document Frequency (IDF): Inverse Document Frequency is a term used to help determine the position of a term in a vector space model. IDF = log ( total documents in database / documents containing the term ) MORE

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