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There is no optical drive in the machine itself, but a USB DVD burner is given as a standard accessory along with the USB (wireless) keyboard and mouse. Ports include ethernet, HDMI, combined audio jack for headphones/microphone, four USB 3.0 connections and a 6-in-1 card reader. The A740's ability to accept HDMI input allows for using the ...
Two pins are used for the mono headphone signal and two pins for the unbalanced microphone signal. The 4-pin XLR connector is also commonly used on amateur radio microphones, but transferring unbalanced audio instead, and using the 4th pin (with the common ground) for a push-to-talk (PTT) circuit activated by a button on the microphone.
The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way. The keyboard driver also tracks the Shift, alt and control state of the keyboard.
The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way. The keyboard driver also tracks the shift, alt and control state of the keyboard.
A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...
Contact microphones based on piezoelectric materials are passive and high-impedance, and they sound tinny without a matching preamp. Instead of being used as a microphone, they alternatively may be used to produce sound (typical used as the buzzer in computer motherboards) by sending voltages to them.
The folio offered a Lenovo keyboard and an optical trackpoint. [7] The presence of this folio was appreciated by PC World as well, with the reviewer calling the folio the Tablet's best feature. [7] The folio was designed to offer users of the ThinkPad Tablet a typing experience similar to that of a ThinkPad laptop, as well as cursor control. [6]
Since a conventional speaker is similar in construction to a dynamic microphone (with a diaphragm, coil and magnet), speakers can actually work "in reverse" as microphones. Reciprocity applies, so the resulting microphone has the same impairments as a single-driver loudspeaker: limited low- and high-end frequency response, poorly controlled ...