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In the above formula, P is measured in units of power, such as watts (W) or milliwatts (mW), and the signal-to-noise ratio is a pure number. However, when the signal and noise are measured in volts (V) or amperes (A), which are measures of amplitude, [note 1] they must first be squared to obtain a quantity proportional to power, as shown below:
Instead the system includes a separate paging controller connected to a trunk port of the telephone system. The paging controller is accessed as either a designated directory number or central office line. In many modern systems, the paging function is integrated into the telephone system, so the system can send announcements to the phone speakers.
The headset features improved noise-cancellation compared to the predecessor QuietComfort (QC) 20, coupled with a noise canceling microphone in the right headphone. It received CNET's Editors' Choice Award or 8.4/10 points for its active noise-cancelling. [24]
Telephone numbers in Nigeria use an open numbering plan.They are composed of a combination of an area code and a local line or subscriber telephone number. Area codes consist of one digit (Lagos, Ibadan and Abuja) or two digits.
Phone plug mated in a phone socket. The plug's grooved tip is held firmly by the socket's spring tip contact. When not mated, this spring instead connects to the flat switch contact for detecting a plug. TS and TRS plugs of different sizes. A phone connector is a family of cylindrically-shaped electrical connectors primarily for analog audio ...
The following languages are listed as having at least 50 million first-language speakers in the 27th edition of Ethnologue published in 2024. [7] This section does not include entries that Ethnologue identifies as macrolanguages encompassing all their respective varieties, such as Arabic, Lahnda, Persian, Malay, Pashto, and Chinese.
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