Tuesday 27th May 2025
    Difficulty: Very hard

    White noise (Quiz #921)

    Photo by <a href="https://unsplash.com/@steinmusic?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash">Con Se</a>
    Photo by Con Se (Unsplash)

    White noise is a mixture of all sound frequencies within the human audible range, in the same way that white light is a mixture of all the colours that are visible to humans.

    1. The lowest frequency that humans can hear is around 20 Hz (20 vibrations per second). What is the highest sound that humans can hear?

    2. What is "pink noise"?

    3. Why is "brown noise" so called?

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