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Even though the gauge system was originally meant for wire, it is now used regardless of whether an item of body jewelry is an actual wire, or is instead a wooden plug, a plastic ring, or any other material. The alternative to using the gauge-and-inches system is to specify the thickness in millimeters.
Real ear measurement is the measurement of sound pressure level in a patient's ear canal developed when a hearing aid is worn. It is measured with the use of a silicone probe tube inserted in the canal connected to a microphone outside the ear and is done to verify that the hearing aid is providing suitable amplification for a patient's hearing loss. [2]
Stretching, in the context of body piercing, is the deliberate expansion of a healed piercing for the purpose of wearing certain types of jewelry. Ear piercings are the most commonly stretched piercings, [1] with nasal septum piercings, tongue piercings and lip piercings/lip plates following close behind. [2]
At ear 20–200 120–140 Risk of instantaneous noise-induced hearing loss: At ear 20.0 120 Jet engine: 100–30 m 6.32–200 110–140 Two-stroke chainsaw [26] 1 m 6.32 110 Jackhammer: 1 m 2.00 100 Traffic on a busy roadway (combustion engines) 10 m 0.20–0.63 80–90 Hearing damage (over long-term exposure, need not be continuous) [27] At ...
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The absolute threshold of hearing (ATH), also known as the absolute hearing threshold or auditory threshold, is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the organism.