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IEEE Recommended Practice for Speech Quality Measurements [3] sets out seventy-two lists of ten phrases each, described as the "1965 Revised List of Phonetically Balanced Sentences (Harvard Sentences)." They are widely used in research on telecommunications, speech, and acoustics, where standardized and repeatable sequences of speech are needed.
The following is the chart of the International Phonetic Alphabet, a standardized system of phonetic symbols devised and maintained by the International Phonetic Association. It is not a complete list of all possible speech sounds in the world's languages, only those about which stand-alone articles exist in this encyclopedia.
SAMPA was developed in the late 1980s in the European Commission-funded ESPRIT project 2589 "Speech Assessment Methods" (SAM)—hence "SAM Phonetic Alphabet"—in order to facilitate email data exchange and computational processing of transcriptions in phonetics and speech technology. SAMPA is a partial encoding of the IPA. The first version of ...
The official summary chart of the IPA, revised in 2020. The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standard written representation for the sounds of speech. [1]
The voiced speech of a typical adult male will have a fundamental frequency from 90 to 155 Hz, and that of a typical adult female from 165 to 255 Hz. [3] Thus, the fundamental frequency of most speech falls below the bottom of the voice frequency band as defined.
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Hearing loss is most common in older adults (presbycusis). People with normal hearing can also hear sounds outside of the speech banana, including both lower-pitched sounds (such bass musical notes and rumbling noises) and higher-pitched sounds (such as very high musical notes, the rustling of leaves, and the chirping of birds).
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