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  2. Absolute threshold of hearing - Wikipedia

    en.wikipedia.org/wiki/Absolute_threshold_of_hearing

    Auditory sensitivity changes when the duration of a sound becomes less than 1 second. The threshold intensity decreases by about 10 dB when the duration of a tone burst is increased from 20 to 200 ms. For example, suppose that the quietest sound a subject can hear is 16 dB SPL if the sound is presented at a duration of 200 ms.

  3. Hearing range - Wikipedia

    en.wikipedia.org/wiki/Hearing_range

    Logarithmic chart of the hearing ranges of some animals [1] [2] 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 ...

  4. Pure-tone audiometry - Wikipedia

    en.wikipedia.org/wiki/Pure-tone_audiometry

    The horizontal part of the curves is where the noise is inaudible. Thus, there is no masking effect on the SRT. The horizontal portion of the curve for the SNHL and CHL extends further than that for a normal hearing person, as the noise needs to become audible to become a problem. Thus, more noise has to be applied, to produce a masking effect.

  5. Doctors Say This Type Of Noise Is Best For Deep Sleep - AOL

    www.aol.com/doctors-type-noise-best-deep...

    If you want to give white noise a try, Dr. Maddox recommends keeping it at a low decibel level and not blasting it all day, as playing white noise at high decibels can cause long-term issues with ...

  6. Audiogram - Wikipedia

    en.wikipedia.org/wiki/Audiogram

    Audiogram. An audiogram is a graph that shows the audible threshold for standardized frequencies as measured by an audiometer.The Y axis represents intensity measured in decibels (dB) and the X axis represents frequency measured in hertz (Hz). [1]

  7. Do Loop earplugs actually work?

    www.aol.com/news/loop-earplugs-actually...

    High 20s to low 30s will provide a good amount of protection, ... a pair of earplugs with a high decibel noise reduction level — of 30 decibels or higher — would be best, according to Fletcher

  8. Health effects from noise - Wikipedia

    en.wikipedia.org/wiki/Health_effects_from_noise

    Annoyance effects of noise are minimally affected by demographics, but fear of the noise source and sensitivity to noise both strongly affect the 'annoyance' of a noise. [42] Sound levels as low as 40 dB(A) can generate noise complaints [43] and the lower threshold for noise producing sleep disturbance is 45 dB(A) or lower. [44]

  9. Sound intensity - Wikipedia

    en.wikipedia.org/wiki/Sound_intensity

    being approximately the lowest sound intensity hearable by an undamaged human ear under room conditions. The proper notations for sound intensity level using this reference are L I /(1 pW/m 2) or L I (re 1 pW/m 2), but the notations dB SIL, dB(SIL), dBSIL, or dB SIL are very common, even if they are not accepted by the SI. [6]