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  2. Automatic gain control - Wikipedia

    en.wikipedia.org/wiki/Automatic_gain_control

    In 1925, Harold Alden Wheeler invented automatic volume control (AVC) and obtained a patent. Karl Küpfmüller published an analysis of AGC systems in 1928. [1] By the early 1930s most new commercial broadcast receivers included automatic volume control. [2] AGC is a departure from linearity in AM radio receivers. [3]

  3. Fairchild 660 - Wikipedia

    en.wikipedia.org/wiki/Fairchild_660

    The 660 was the first intelligent automatic volume control limiter. [1] The Fairchild 670, introduced shortly after the 660, is a dual-channel version. [2] The rarity of Fairchild compressors has made them highly desirable and very valuable, with a used 660 now selling for $20,000 or more and a 670 selling for $30,000–$40,000 or more.

  4. Automatic volume limiter system - Wikipedia

    en.wikipedia.org/wiki/Automatic_volume_limiter...

    An automatic volume limiter system (AVLS) is an option that limits the maximum volume level and is enabled through software or hardware in stationary or portable media player devices used with headphones such as the Walkman or Sony PSP. [1]

  5. Damper (flow) - Wikipedia

    en.wikipedia.org/wiki/Damper_(flow)

    This damper can switch the electrical power to control additional "slave" dampers, minimizing the electrical load on the damper's control circuitry and power transformer. A zone damper (also known as a Volume Control Damper or VCD) is a specific type of damper used to control the flow of air in an HVAC heating or cooling system. In order to ...

  6. Stuart Ballantine - Wikipedia

    en.wikipedia.org/wiki/Stuart_Ballantine

    From 1929 to 1934 he was President of the Boonton Research Laboratories investigating errors in microphones due to diffraction and cavity resonance, and developing new devices including an electrostethoscope, automatic optical recorder for frequency-response measurements, and logarithmic voltmeter. In 1934 he founded Ballantine Laboratories ...

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    help.aol.com

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  8. Settings A-Z - AOL Help

    help.aol.com/settings

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  9. Volume Logic - Wikipedia

    en.wikipedia.org/wiki/Volume_Logic

    [2] [3] Volume Logic disabled RealPlayer's volume control and uses its own. Presets stored settings for the amount of each kind of processing to be applied: automatic gain control, limiting, bass boost, etc. Presets cannot be added. The Volume Logic plug-in incorporated multi-band dynamics processing technology, solving common audio problems ...