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A contact microphone is a form of microphone that senses audio vibrations through contact with solid objects. [1] Unlike normal air microphones, contact microphones are almost completely insensitive to air vibrations but transduce only structure-borne sound.
Photo: 2.5 mm mono (TS), 3.5 mm mono and stereo (TRS), and 1 ⁄ 4 inch (6.4 mm) stereo (TRS) phone connectors The most common microphone connector in consumer use is the venerable phone connector, in 1 ⁄ 4 inch (6.4 mm), 3.5 mm, and 2.5 mm sizes, and in both mono and stereo configurations.
A fan controller with LEDs indicating fan status and potentiometers and switches to control fan speeds Another method, popular with PC hardware enthusiasts, is the manual fan speed controller. They can be mounted in an expansion slot or a 5.25" or 3.5" drive bay or come built into a computer's case.
A user can even supplement this function with additional cooling components or connect a manual fan controller with knobs that set fans to different speeds. [ 1 ] In the IBM PC compatible market, the computer's power supply unit (PSU) almost always uses an exhaust fan to expel warm air from the PSU.
A microphone, colloquially called a mic (/ m aɪ k /), [1] or mike, [a] is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones , hearing aids , public address systems for concert halls and public events, motion picture production, live and recorded audio engineering , sound ...
An electret film is applied to the back plate of the microphone capsule and the diaphragm is made of an uncharged material, which may be mechanically more suitable for the transducer design being realized. Front electret This design features no back plate, and the capacitor is formed by the diaphragm and the inside surface of the capsule.
Photograph of a GaAs MMIC (a 2–18 GHz upconverter) MMIC MSA-0686. Monolithic microwave integrated circuit, or MMIC (sometimes pronounced "mimic"), is a type of integrated circuit (IC) device that operates at microwave frequencies (300 MHz to 300 GHz).
In addition, the internal structure of the first batch of units, described as "a disaster" by The Daily Telegraph, [23] used an aluminum enclosure inside the plastic case as the heat sink instead of a cooling fan, reputedly to meet Steve Jobs' demands for a silent computer and reduce RFI emissions, a severe problem affecting the Apple II. The ...