Did you notice that the early 900s changed the world? There were massive social and economic shifts. The first was global competition 0 if you work for a company, that company now has worldwide competition. An old school friend of mine makes hearing aids. But their competitor makes them for half the cost in Vietnam. So his job is about to go.
Shift 2 was mini computerization - it created laptops and mobiles, DVD and iPods 0 and frankly, humans can0t compete with these never-complaining tools.
Shift 3 was instant information 0 endless channels of digital TV, Broadband, email. Information overload has created a world that is crazy busy, wants instant gratification and has a short attention span. You can find out anything about anything within minutes thanks to the internet.
It used to take a generation to go through these changes. We0ve gone through them in a few years.
And it was done using 0Mass Marketing0 - where the media blanket brainwashed everyone into buying brand products. Nowadays its individualized marketing aimed at you if you0re the target client they want to reach 0 that0s why your credit card transactions get logged and you receive more and more junk mail and email about […]
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Microphones are used in many applications such astelephones, tape recorders, hearing aids, motion picture production, live and recordedaudio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non acoustic purposes such as ultrasonic checking.
A microphone is a device made to capture waves in air, water or hard material and translate them into an electrical signal. The most common method is via a thin membrane producing some proportional electrical signal. Most microphones in use today for audio use electromagnetic generation are dynamic microphones, capacitance change condenser microphones or piezoelectric generation to produce the signal from mechanical vibration.
Uses of different kinds of microphones
Condenser microphones span the range from cheap instruments to high quality instruments. They generally produce a high quality audio signal and are now the popular choice in laboratory and studio recording applications. They require a power source, provided generally from microphone inputs from a small battery.
Professional microphones often sport an external power supply for reasons of quality perception. Power is necessary for establishing the capacitor plate voltage, and is also needed for internal amplification of the signal to a useful output level. Condenser microphones are also available with two diaphragms, […]
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All microphones convert sound energy into electrical energy, but there are many different ways of doing the job, using electrostatics, electromagnetism, piezo electric effects or even the change in resistance of carbon granules. Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non-acoustic purposes such as ultrasonic checking.
When it comes to microphones used in music recording or live performance the vast majority of microphones used are either capacitor or electrostatic or dynamic or electromagnetic models. Both types employ a moving diaphragm to capture the sound, but make use of a different electrical principle for converting the mechanical energy into an electrical signal. The efficiency of this conversion is very important, because the amounts of acoustic energy produced by the voices and the musical instruments are so small.
Dynamic Microphones
Dynamic microphones work via electromagnetic induction. They are robust, relatively inexpensive and resistant to moisture, and for this reason they are widely used on stage by singers. There are two basic types. The moving coil microphone and the ribbon microphone.
Dynamic microphones have the advantages of […]
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