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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]
Computer speakers, or multimedia speakers, are speakers sold for use with computers, although usually capable of other audio uses, e.g. for an MP3 player. Most such speakers have an internal amplifier and consequently require a power source, which may be by a mains power supply often via an AC adapter , batteries, or a USB port.
Speakerphones may be broadly divided into two classes of Duplex: . Half-duplex; Full-duplex; Half-duplex speakerphones allow sound to travel only in one direction at a time, either: 1) into the speakerphone from the telephone line and out of its internal speaker to its user, or 2) from its user, into the microphone, and out through the telephone line.
To take advantages both from soundbar and stereo set system, some manufacturers produce soundbar hybrids in which the soundbar represents left, center, and right speakers; the subwoofer and rear-left and rear-right speakers are connected wirelessly to the soundbar. The setup offers all channels needed to produce 5.1 surround. [7]
A PC speaker is a loudspeaker built into some IBM PC compatible computers. ... Pin Function 1 -SP Speaker negative 2 GND or KEY Ground, or unwired key 3 GND Ground: 4
At this frequency, the voice coil is vibrating in the speaker's magnetic field with maximum peak-to-peak amplitude and velocity. The back EMF generated by this movement is also at its maximum. The electrical impedance of the speaker varies with the back EMF and thus with the applied frequency.
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Starting 2015, some wireless speakers integrate VOIP telephony functions. [5] Other models have an integrated FM radio. The higher end models add an LCD screen to make it easier to select and store radio stations. Most wireless speakers have a built-in microphone, which allows to receive and make calls using a mobile phone in hands