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The Yoga 2 Pro's backlit AccuType keyboard. The Yoga 2 Pro is an Ultrabook-class device. It weighs 3.1 lb (1.4 kg), is 0.61 inch thick and has tapered edges, giving it an appearance more like a conventional ultrabook laptop vs the earlier model's "book-like" symmetrical design.
In electronics, motorboating is a type of low frequency parasitic oscillation (unwanted cyclic variation of the output voltage) that sometimes occurs in audio and radio equipment and often manifests itself as a sound similar to an idling motorboat engine, a "put-put-put", in audio output from speakers or earphones.
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 ...
Block diagram of the signal-flow for a common feedback loop [1]: 118 . Audio feedback (also known as acoustic feedback, simply as feedback) is a positive feedback situation that may occur when an acoustic path exists between an audio output (for example, a loudspeaker) and its audio input (for example, a microphone or guitar pickup).
Electret microphone capsules This typical electret microphone circuit has a common source configured JFET inside the two-terminal electret capsule. The JFET is externally-powered by the DC voltage V + through a resistor which sets the gain and output impedance. The output audio signal is received though a DC blocking capacitor.
Dave Wilson of Wilson audio, used JansZen tweeters in his famous, WAMM, Wilson Audio Modulator Monitor. That speaker sold for $220,000 a pair when it was discontinued. The developers of the Tri-Ergon sound-on-film sound film system had developed a primitive design of electrostatic loudspeaker as early as 1919.
Situational circumstances: Sometimes a microphone should not be visible, or having a microphone nearby is not appropriate. In scenes for a movie the microphone may be held above, out of the picture frame. Processing: If the signal is destined to be heavily processed, or mixed down, a different type of input may be required.
A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an electroacoustic transducer [1]: 597 that converts an electrical audio signal into a corresponding sound. [2]