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Mobile Electronics Glossary of Terms and Definitions - M

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Mobile Electronics Glossary - M
  Magnet - A device which has the ability to attract or repel pieces of iron or other magnetic material. Speaker magnets provide a stationary magnetic field so that when the coil produces magnetic energy, it is either repelled or attracted by the stationary magnet.
  Magnetic Flux - The magnetic lines of force produced in the area around an electric current or magnet.
  Magnetic Structure - The part of loudspeaker comprising the magnet, pole piece, back plate and top plate.
  MECP - Mobile Electronics Certification Program.
  Mega (M) - A prefix that means 106 (one million in the US). 1 MHz equals 1,000,000 Hertz.
  Memory - The word most commonly used to refer to a system's ability to retain specific information.
  Micro (µ) - A prefix that means 1/ 106 (one millionth in the US). 1 µV equals 1/1,000,000 of a volt.
  Microprocessor - A semiconductor that can be programmed to perform a variety of tasks in many different systems.
  Midrange Driver - A loudspeaker specifically designed to reproduce the frequencies in the middle of the audible bandwidth. Usually between three and eight inches in diameter. Commonly referred to as the low frequency driver in a set of separates.
  Milli (m) - A prefix that means 1/ 103 (one thousandth). 1 mA equals 1/1,000 of an amp.
  Mmd - Diaphram mass, in grams
  Mms - The driver's effective mechanical mass (including air load), in kg. "This parameter is the combination of the weight of the cone assembly plus the ‘driver radiation mass load’. The weight of the cone assembly is easy: it’s just the sum of the weight of the cone assembly components. The driver radiation mass load is the confusing part. In simple terminology, it is the weight of the air (the amount calculated in Vd) that the cone will have to push."
  Monaural (mono) - A sound recorded or reproduced in only one channel.
  MOSFET - Metal Oxide Semiconductor Field Effect Transistor. A form of field-effect transistor controlled by voltage rather than current, like a bipolar transistor. MOSFETs have a significantly higher switching speed than bipolar transistors. They generate almost no loss (little heat generation), which lends the power supply fast response, excellent linearity, and high efficiency. Typically used in high power output amplifiers.
  Ms - The total moving mass of the loudspeaker cone.
  Multimeter - A common term used to describe a VOM (voltage ohm meter). A multimeter usually has the ability to measure volts, resistance (ohms), and amperes or milliamperes.
  Music - 1. an art of sound in time that expresses ideas and emotions in significant forms through the elements of rhythm, melody, harmony, and color. 2. the tones or sounds employed, occurring in single line (melody) or multiple lines (harmony), and sounded or to be sounded by one or more voices or instruments, or both. 3. musical work or compositions for singing or playing. 4. the written or printed score of a musical composition. 5. such scores collectively 6. any sweet, pleasing, or harmonious sounds or sound: the music of the waves 7. appreciation of or responsiveness to musical sounds or harmonies: Music was in his very soul.
  Mute - Silent, attenuate.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Mobile Electronics Basics:
Diodes
Glossary of Terms and Definitions
Ohm's Law
Recommended Books & DVD's
Recommended Wire Sizes
Relays
Resistors
Tools and Equipment


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