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  2. RIAA equalization - Wikipedia

    en.wikipedia.org/wiki/RIAA_equalization

    FM radio receivers using Armstrong circuits and treble de-emphasis would render high-quality, wide-range audio output with low noise levels. When the Columbia LP was released in June 1948, the developers subsequently published technical information about the 33 1 ⁄ 3 rpm, microgroove, long-playing record. [ 5 ]

  3. Equalization (audio) - Wikipedia

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

    The number of frequency channels may be matched to the requirements of the intended application. A car audio equalizer might have a total of five to ten frequency bands. An equalizer for professional live sound reinforcement typically has some 25 to 31 bands, for more precise control of feedback problems and equalization of room modes.

  4. Smiley face curve - Wikipedia

    en.wikipedia.org/wiki/Smiley_face_curve

    Smiley face curves have been popular with some car audio enthusiasts, disc jockeys, electric bass players, home stereo owners and sound reinforcement operators. [ 2 ] [ 3 ] Though the graphic equalizer was intended to tailor a system's response to compensate for venue and performance conditions, the smiley face curve is sometimes applied as a ...

  5. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    Many audio components are tested for performance using objective and quantifiable measurements, e.g., THD, dynamic range and frequency response. Some take the view that objective measurements are useful and often relate well to subjective performance, i.e., the sound quality as experienced by the listener. [12]

  6. Equalization (communications) - Wikipedia

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

    A television equalizer consequently typically requires more filter sections than an audio equalizer. To keep this manageable, television equalizer sections were often combined into a single network using ladder topology to form a Cauer equalizer. The second issue is that phase equalization is essential for an analog television signal.

  7. Comparison of analog and digital recording - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_analog_and...

    CD quality audio is sampled at 44,100 Hz (Nyquist frequency = 22.05 kHz) and at 16 bits. Sampling the waveform at higher frequencies and allowing for a greater number of bits per sample allows noise and distortion to be reduced further. DAT can sample audio at up to 48 kHz, while DVD-Audio can be 96

  8. Delivered Audio Quality - Wikipedia

    en.wikipedia.org/wiki/Delivered_Audio_Quality

    Delivered Audio Quality, abbreviated as DAQ, is a measure of audio quality over a transmission medium. This metric is often used to quantify the quality of audio heard over a radio system. DAQ levels are defined by the following scale. DAQ 1: Unusable. Speech present but not understandable. DAQ 2: Speech understandable with considerable effort.

  9. Sound quality - Wikipedia

    en.wikipedia.org/wiki/Sound_quality

    Sound quality is typically an assessment of the accuracy, fidelity, or intelligibility of audio output from an electronic device. Quality can be measured objectively, such as when tools are used to gauge the accuracy with which the device reproduces an original sound; or it can be measured subjectively, such as when human listeners respond to ...