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  2. Absolute threshold of hearing - Wikipedia

    en.wikipedia.org/wiki/Absolute_threshold_of_hearing

    The absolute threshold is not a discrete point and is therefore classed as the point at which a sound elicits a response a specified percentage of the time. [1] The threshold of hearing is generally reported in reference to the RMS sound pressure of 20 micropascals , i.e. 0 dB SPL, corresponding to a sound intensity of 0.98 pW/m 2 at 1 ...

  3. Sensorineural hearing loss - Wikipedia

    en.wikipedia.org/wiki/Sensorineural_hearing_loss

    Sensorineural hearing loss ( SNHL) is a type of hearing loss in which the root cause lies in the inner ear, sensory organ ( cochlea and associated structures), or the vestibulocochlear nerve ( cranial nerve VIII). SNHL accounts for about 90% of reported hearing loss. [citation needed] SNHL is usually permanent and can be mild, moderate, severe ...

  4. Noise-induced hearing loss - Wikipedia

    en.wikipedia.org/wiki/Noise-induced_hearing_loss

    Otorhinolaryngology, audiology. Noise-induced hearing loss ( NIHL) is a hearing impairment resulting from exposure to loud sound. People may have a loss of perception of a narrow range of frequencies or impaired perception of sound including sensitivity to sound or ringing in the ears. [1] When exposure to hazards such as noise occur at work ...

  5. Dolphin Returns to Dock to Greet Golden Retriever in Real ...

    www.aol.com/dolphin-returns-dock-greet-golden...

    It even seemed like the dolphin was waiting for the dog and her owner to return to a nearby pier so they could play. The woman exclaimed when they saw the dolphin swimming in the water. "The ...

  6. Free or low-cost birth control is becoming increasingly ...

    www.aol.com/news/free-low-cost-birth-control...

    Alabama, Texas and Mississippi are among the 10 states that voted not to expand Medicaid this year, meaning it remains difficult to qualify. The second option is getting the implant through the ...

  7. Hearing protection device - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_device

    A hearing protection device, also known as a HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise and provide hearing protection to help prevent noise-induced hearing loss. HPDs reduce the level of the noise entering the ear. HPDs can also protect against other effects of noise exposure such as tinnitus and ...

  8. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    This "code" is one of many innocuous sounding secret codes that. If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow ...

  9. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    t. e. An audio frequency or audible frequency ( AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [ 1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz. [ 2][ 3][ 4] In air at atmospheric ...