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  2. Ray J - Wikipedia

    en.wikipedia.org/wiki/Ray_J

    Ray J. William Ray Norwood Jr. (born January 17, 1981), [1] known professionally as Ray J, is an American R&B singer, songwriter, television personality, and actor. Born in McComb, Mississippi, and raised in Carson, California, he is the younger brother of singer and actress Brandy Norwood. [3] In 2005, Ray J scored the Top 20 Billboard Hot 100 ...

  3. Australia - Wikipedia

    en.wikipedia.org/wiki/Australia

    Australia, officially the Commonwealth of Australia,[19]is a countrycomprising the mainlandof the Australian continent, the island of Tasmania, and numerous smaller islands.[20] Australia is the largest country by area in Oceaniaand the world's sixth-largest country.

  4. Pressure Relief - Wikipedia

    en.wikipedia.org/wiki/Pressure_Relief

    Pressure Relief. Pressure relief may refer to: stress management to relieve psychological stress on a human. relieving excessive pressure forces to protect a mechanical system, typically using a pressure-relief device such as a safety valve or rupture disc.

  5. Tinnitus - Wikipedia

    en.wikipedia.org/wiki/Tinnitus

    Rather than a disease, tinnitus is a symptom that may result from a variety of underlying causes and may be generated at any level of the auditory system as well as outside that system. The most common causes are hearing damage, noise-induced hearing loss, or age-related hearing loss, known as presbycusis. [2] Other causes include ear infections, disease of the heart or blood vessels ...

  6. Hearing range - Wikipedia

    en.wikipedia.org/wiki/Hearing_range

    Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies ...

  7. Sound pressure - Wikipedia

    en.wikipedia.org/wiki/Sound_pressure

    Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average or equilibrium) atmospheric pressure, caused by a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone.

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