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  2. DI unit - Wikipedia

    en.wikipedia.org/wiki/DI_unit

    A DI unit (direct input or direct inject) is an electronic device typically used in recording studios and in sound reinforcement systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone level, balanced input, usually via an XLR connector and XLR cable. DIs are frequently used to connect an electric ...

  3. Common ethanol fuel mixtures - Wikipedia

    en.wikipedia.org/wiki/Common_ethanol_fuel_mixtures

    Ethanol fuel mixtures have "E" numbers which describe the percentage of ethanol fuel in the mixture by volume, for example, E85 is 85% anhydrous ethanol and 15% gasoline. Low-ethanol blends are typically from E5 to E25, although internationally the most common use of the term refers to the E10 blend. Blends of E10 or less are used in more than ...

  4. Microphone - Wikipedia

    en.wikipedia.org/wiki/Microphone

    Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, and radio and television broadcasting.

  5. Astatic Corporation - Wikipedia

    en.wikipedia.org/wiki/Astatic_Corporation

    Astatic also manufactured bullet style microphones, which are extremely popular among harmonica players. The original Astatic model JT-30 was introduced in late 1939. There were many variations in different colors such as the JT-30-C, W-30, 31, JT-31, JT-40, JT-50, and Model A. It is one of the most popular microphones for blues harp players. [6]

  6. Georgia teachers pressed new panic buttons during shooting ...

    www.aol.com/news/georgia-teachers-pressed-panic...

    Andrew Hay. September 5, 2024 at 6:31 PM. By Andrew Hay. (Reuters) - Teachers at the Georgia high school, where a shooter killed four people on Wednesday, pressed wearable panic buttons -- in use ...

  7. Domain Awareness System - Wikipedia

    en.wikipedia.org/wiki/Domain_Awareness_System

    The Domain Awareness System is the largest digital surveillance system in the world [2] as part of the Lower Manhattan Security Initiative in partnership between the New York Police Department and Microsoft to monitor New York City. [3] It allows the NYPD to track surveillance targets and gain detailed information about them, and is overseen by ...

  8. AOL Mail for Verizon Customers - AOL Help

    help.aol.com/products/aol-mail-verizon

    Call live aol support at. 1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more.

  9. Equalization (audio) - Wikipedia

    en.wikipedia.org/wiki/Equalization_(audio)

    Equalization, or simply EQ, in sound recording and reproduction is the process of adjusting the volume of different frequency bands within an audio signal. The circuit or equipment used to achieve this is called an equalizer. [1][2] Most hi-fi equipment uses relatively simple filters to make bass and treble adjustments.