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  2. AKG (company) - Wikipedia

    en.wikipedia.org/wiki/AKG_(company)

    AKG Acoustics (originally Akustische und Kino-Geräte Gesellschaft m.b.H., English: Acoustic and Cinema Equipment L.L.C.) is an acoustics engineering and manufacturing company. It was founded in 1947 by Rudolf Görike and Ernest Plass in Vienna , Austria .

  3. Digital room correction - Wikipedia

    en.wikipedia.org/wiki/Digital_room_correction

    Digital room correction may involve minimum phase algorithms, to maintain wavefront coherence over the intended frequency range.. The use of analog filters, such as equalizers, to normalize the frequency response of a playback system has a long history; however, analog filters are very limited in their ability to correct the distortion found in many rooms.

  4. WSPR (amateur radio software) - Wikipedia

    en.wikipedia.org/wiki/WSPR_(amateur_radio_software)

    The type of radio emission is “F1D”, frequency-shift keying. A message contains a station's callsign, Maidenhead grid locator, and transmitter power in dBm. [3] The WSPR protocol compresses the information in the message into 50 bits (binary digits).

  5. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    The frequency range often specified for audio components is between 20 Hz to 20 kHz, which broadly reflects the human hearing range. Well-designed solid-state amplifiers and CD players may have a frequency response that varies by only 0.2 dB between 20 Hz to 20 kHz. [4]

  6. Frequency response - Wikipedia

    en.wikipedia.org/wiki/Frequency_response

    Magnitude response of a low pass filter with 6 dB per octave or 20 dB per decade roll-off. Measuring the frequency response typically involves exciting the system with an input signal and measuring the resulting output signal, calculating the frequency spectra of the two signals (for example, using the fast Fourier transform for discrete signals), and comparing the spectra to isolate the ...

  7. Automatic frequency control - Wikipedia

    en.wikipedia.org/wiki/Automatic_frequency_control

    Basic automatic frequency control in a radio receiver. У = RF amplifier stages, Д = frequency discriminator stage In radio equipment, Automatic Frequency Control ( AFC ), also called Automatic Fine Tuning ( AFT ), is a method or circuit to automatically keep a resonant circuit tuned to the frequency of an incoming radio signal .

  8. Netherlands to expand export controls on semiconductor equipment

    www.aol.com/news/netherlands-expand-export...

    The Dutch government on Wednesday said it would expand its export controls on advanced semiconductor equipment from April 1, which chip equipment company ASML said it did not expect to impact its ...

  9. Sennheiser MD 421 - Wikipedia

    en.wikipedia.org/wiki/Sennheiser_MD_421

    It is known for its almost linear frequency response in the bass range up to 1,000 Hz. Above that, the microphone exhibits a smooth increase in upper mid-range frequencies important for intelligibility. In 1966, Udo Jürgens won the Eurovision Song Contest, singing the song "Merci, Chérie" into an MD 421. By 1971, the contest was almost ...