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  2. Dog whistle - Wikipedia

    en.wikipedia.org/wiki/Dog_whistle

    A dog whistle (also known as silent whistle or Galton's whistle) is a type of whistle that emits sound in the ultrasonic range, which humans cannot hear but some other animals can, including dogs and domestic cats, and is used in their training. It was invented in 1876 by Francis Galton and is mentioned in his book Inquiries into Human Faculty ...

  3. 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 ...

  4. Absolute threshold of hearing - Wikipedia

    en.wikipedia.org/wiki/Absolute_threshold_of_hearing

    Absolute threshold of hearing. 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 ...

  5. The best noise-canceling earbuds for 2024 - Engadget

    www.engadget.com/best-noise-canceling-earbuds...

    Like it does on its 1000X over-ear headphones, Sony uses two separate chips for audio and ANC processing on the M5 earbuds, which leads to more robust noise-blocking than on previous models. Six ...

  6. Technics EAH-AZ70W true wireless earbuds review - Engadget

    www.engadget.com/technics-eah-az70w-review-true...

    The Technics EAH-AZ70W true wireless earbuds do some things very well, but the audio quality can be hit or miss. It’s difficult to bring too many design flourishes to true wireless earbuds, but ...

  7. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

    www.aol.com/entertainment/20-off-raycon-earbuds...

    These Basic Earbuds. The Work Earbuds Classic. Raycon. For everyday wear that’s easy to take in and out, these buds are the perfect pick! See it! Get The Work Earbuds Classic (originally $120 ...

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