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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.
Apple bundled a pair of model M7963 clear spherical/globe Sound Stick 2.1 based speakers with the Power Mac G4 Cube, which was released on July 19, 2000. They used a custom USB interface and originally worked with the G4 Cube, Power PCs and ADC/ADP monitor screens. They work right up to OSX 10.6.4 Snow Leopard.
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.
Wireless speakers are loudspeakers that receive audio signals using radio frequency (RF) waves rather than over audio cables. The two most popular RF frequencies that support audio transmission to wireless loudspeakers include a variation of WiFi IEEE 802.11 , while others depend on Bluetooth to transmit audio data to the receiving speaker.
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]
The ratio between two acoustic pressures in deciBels is expressed by the equation dB = 20log(p1/p2), so for every doubling of distance from the point source p1 = 1 and p2 = 2, thus there is a sound pressure decrease of approximately 6 dB. A line source is a hypothetical one-dimensional source of a sound, as opposed to a dimensionless point ...
Of the languages spoken in Ethiopia, 91 are living and 1 is extinct. 41 of the living languages are institutional, 14 are developing, 18 are vigorous, 8 are in danger of extinction, and 5 are near extinction. [5] According to data from 2021 from Ethnologue, [6] the largest first languages are: Oromo speakers numbering more than 36 million ...
Safaricom Telecommunications Ethiopia P.L.C. (STE), previously known as Global Partnership for Ethiopia BV (GPE), is a subsidiary of the Kenyan mobile operator Safaricom in Ethiopia, [2] licensed with fee of US$850 million on 9 July 2021. [3] [4] This fee made it the single largest foreign direct investment into Ethiopia.