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The Harvard sentences, or Harvard lines, [1] is a collection of 720 sample phrases, divided into lists of 10, used for standardized testing of Voice over IP, cellular, and other telephone systems. They are phonetically balanced sentences that use specific phonemes at the same frequency they appear in English.
A typical relay service conversation. A telecommunications relay service, also known as TRS, relay service, or IP-relay, or Web-based relay service, is an operator service that allows people who are deaf, hard of hearing, deafblind, or have a speech disorder to place calls to standard telephone users via a keyboard or assistive device.
Programming of Dynamic Speech Generating devices is usually done by augmentative communication specialists. Specialists are required to cater to the needs of the patients because the patients usually choose what kinds of words/ phrases they want. For example, patients use different phrases based on their age, disability, interests, etc.
In 1994, the ITU approved the V.18 standard, which comprises two major parts, a dual standard. [8] It is both an umbrella protocol that allows recognition and interoperability of some of the most commonly used textphone protocols, as well as offering a native V.18 mode, which is an ASCII full- or half-duplex modulation method.
Keyboard used to create speech over a telephone using a Text to Speech converter. Devices with voice output offer their user the advantage of more communicative power, including the ability to initiate conversation with communication partners who are at a distance. [44] However, they typically require programming, [44] and can be unreliable.
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Perceptual Evaluation of Speech Quality (PESQ) is a family of standards comprising a test methodology for automated assessment of the speech quality as experienced by a user of a telephony system. It was standardized as Recommendation ITU-T P.862 [1] in 2001. PESQ is used for objective voice quality testing by phone manufacturers, network ...
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