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  2. Quiet PC - Wikipedia

    en.wikipedia.org/wiki/Quiet_PC

    A 120 mm variable speed fan. If they use fans at all, quiet PCs typically use larger-than-usual low-speed fans with quiet-running motors and bearings. The 120 mm size is common, and 140 mm fans are used where cases or heat sinks allow them. Quiet fan manufacturers include Nexus, EBM-Papst, [30] Yate Loon, Scythe, [31] and Noctua. [32]

  3. Long-range acoustic device - Wikipedia

    en.wikipedia.org/wiki/Long-range_acoustic_device

    Acoustic hailing devices have an output of 135 decibels (dB) or greater. The acoustic level of the source is commonly expressed in terms of Sound Pressure Level or SPL. SPL is a logarithmic measure of the rms sound pressure of a sound relative to a reference value. It is measured in decibels (dB) above a standard reference level. For reference ...

  4. Loudness - Wikipedia

    en.wikipedia.org/wiki/Loudness

    The horizontal axis shows frequency in Hertz. In acoustics, loudness is the subjective perception of sound pressure.More formally, it is defined as the "attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud". [1]

  5. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  6. How to Get Rid of Blisters, According to Doctors - AOL

    www.aol.com/rid-blisters-according-doctors...

    BLISTERS MIGHT NOT seem like a big deal—until you get one and remember how debilitating they can be. These painful skin lesions are caused by friction when your skin rubs against your shoes ...

  7. Health effects from noise - Wikipedia

    en.wikipedia.org/wiki/Health_effects_from_noise

    Traumatic noise exposure can happen at work (e.g., loud machinery), at play (e.g., loud sporting events, concerts, recreational activities), and/or by accident (e.g., a backfiring engine.) Noise induced hearing loss is sometimes unilateral and typically causes patients to lose hearing around the frequency of the triggering sound trauma. [17]

  8. Turbofan - Wikipedia

    en.wikipedia.org/wiki/Turbofan

    Hot gas from the turbojet turbine exhaust expanded through the LP turbine, the fan blades being a radial extension of the turbine blades. This arrangement introduces an additional gas leakage path compared to a front-fan configuration and was a problem with this engine with higher-pressure turbine gas leaking into the fan airflow. [ 47 ]

  9. Florida sues FEMA, alleging discrimination against Trump ...

    www.aol.com/news/florida-sues-fema-alleging...

    Florida's attorney general said on Thursday she filed a lawsuit against the U.S. Federal Emergency Management Agency for allegedly discriminating against hurricane victims who supported President ...