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  2. Noise-induced hearing loss - Wikipedia

    en.wikipedia.org/wiki/Noise-induced_hearing_loss

    Passive ear protection includes earplugs or earmuffs which can block noise up to a specific frequency. Earplugs and earmuffs can provide the wearer with 10 dB to 40 dB of attenuation. [ 99 ] However, use of earplugs is only effective if the users have been educated and use them properly; without proper use, protection falls far below ...

  3. Hearing protection device - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_device

    Pre-molded earplugs have a preformed shape and a push-to-fit design. Formable earplugs are pliable and take the form of an individual's ear canal. Roll-down foam earplugs are one of the most commonly used earplugs, and are made from slow recovery foam which expands after it has been "rolled-down" and inserted in the ear canal, creating a ...

  4. Do Loop earplugs actually work?

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

    Loop’s highest decibel earplug is the Loop Quiet; if you’re looking for something stronger with better noise reduction, consider Mack’s soft foam earplugs $10, which have 33 decibels SNR or ...

  5. Earplug - Wikipedia

    en.wikipedia.org/wiki/Earplug

    Such custom molded earplugs with low pass filter and mechanical valve typically have a +85 dB(A) mechanical clamp, in addition to having a lowpass filter response, thereby providing typically 30-31 dB attenuation to loud impulse noises, with only a 21 dB reduction under low noise conditions across the human voice audible frequency range (300 ...

  6. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.

  7. Earmuffs - Wikipedia

    en.wikipedia.org/wiki/Earmuffs

    Thus, in situations where noise is dominated by low-frequency energy, earplugs are likely to be more effective. Earmuffs also fail to provide any noise reduction at infrasonic frequencies (< 20 Hz), [ 20 ] which is energy that cannot be heard because it falls below the range of human hearing sensitivity.