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In order to take a scientific measurement with a microphone, its precise sensitivity must be known (in volts per pascal). Since this may change over the lifetime of the device, it is necessary to regularly calibrate measurement microphones. This service is offered by some microphone manufacturers and by independent testing laboratories.
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 ...
Sound cards using the PC Card interface were available before laptop and notebook computers routinely had onboard sound. Most of these units were designed for mobile DJs , providing separate outputs to allow both playback and monitoring from one system, however, some also target mobile gamers.
PC Guide color lime green. Line outputs usually present a source impedance of from 100 to 600 ohms. The voltage can reach 2 volts peak-to-peak with levels referenced to −10 dBV (300 mV) at 10 kΩ. The frequency response of most modern equipment is advertised as at least 20 Hz to 20 kHz, which corresponds to the range of human hearing. Line ...
This computer was the basis for all of Apple’s modern computers that followed. It launched in 1984, and while it seems like a bulky monstrosity compared to today’s sleek laptops, collectors ...
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The Harvard sentences, or Harvard lines, [1] is a collection of 720 sample phrases, divided into lists of 10, used for standardized testing of Voice over IP, cellular, and other telephone systems.
Every month, thousands of Eritreans attempt to flee repression, torture and indefinite forced conscriptions by embarking on a dangerous journey to Europe.