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  2. Speedcore - Wikipedia

    en.wikipedia.org/wiki/Speedcore

    The term speedcore in reference to high tempo hardcore/gabber can be traced as far back as 1995. [7] [8] Disciples Of Annihilation coined the name of the genre with their track "NYC Speedcore". [4] Belgian artist DJ Einrich refined the sound in the late 1990s, using oscillators to transform fast kick drums into notes in octaves. [5]

  3. Orders of magnitude (frequency) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    60 bpm, common tempo in music 2 Hz: 120 bpm, common tempo in music ~7.83 Hz: Fundamental frequency of the Schumann resonances: 10 1: 10 hertz 10 Hz: Cyclic rate of a typical automobile engine at idle (equivalent to 600 rpm) 12 Hz: Acoustic – the lowest possible frequency that a human can hear [3] 18 Hz: Average house cat's purr 24 Hz

  4. Cycle per second - Wikipedia

    en.wikipedia.org/wiki/Cycle_per_second

    The term comes from repetitive phenomena such as sound waves having a frequency measurable as a number of oscillations, or cycles, per second. [1] With the organization of the International System of Units in 1960, the cycle per second was officially replaced by the hertz, or reciprocal second, "s −1" or "1/s".

  5. Black metal - Wikipedia

    en.wikipedia.org/wiki/Black_metal

    2.3 Second wave (1991–1997) 2.3.1 ... bass and blast beats to maintain tempos that can sometimes approach 300 beats per minute. ... the later trademark sound of ...

  6. Engineering students extinguish a fire with sound waves - AOL

    www.aol.com/news/2015-03-26-engineering-students...

    Two students from George Mason University recently extinguished a blaze by using something far less common than an extinguisher or a bucket of water: sound waves.

  7. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    For every 3 non-theme words you find, you earn a hint. Hints show the letters of a theme word. If there is already an active hint on the board, a hint will show that word’s letter order.

  8. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    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 pressure, these represent sound waves with wavelengths of 17 metres (56 ft) to 1.7 centimetres (0.67 in).

  9. Alcohol is not good for us. 5 tips to stay safe(r) if you drink

    www.aol.com/drink-not-drink-5-tips-142139741.html

    Alcohol is used as a social lubricant, maybe more so as holiday festivities approach. But drinking carries health and other risks. Here are five tips to make it safer.