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2. Audio system measurements - Wikipedia

   en.wikipedia.org/wiki/Audio_system_measurements

   Audio system measurements are used to quantify audio system performance. These measurements are made for several purposes. Designers take measurements to specify the performance of a piece of equipment.

3. Compact Disc Digital Audio - Wikipedia

   en.wikipedia.org/wiki/Compact_Disc_Digital_Audio

   Compact Disc Digital Audio (CDDA or CD-DA), also known as Digital Audio Compact Disc or simply as Audio CD, is the standard format for audio compact discs. The standard is defined in the Red Book technical specifications , which is why the format is also dubbed "Redbook audio" in some contexts. [ 1 ]

4. Flat weighting - Wikipedia

   en.wikipedia.org/wiki/Flat_weighting

   Note 1: Flat noise power is expressed in dBrn (f 1 − f 2) or in dBm (f 1 − f 2). Note 2: "3 kHz flat weighting" and "15 kHz flat weighting" are based on amplitude-frequency characteristics that are flat between 30 Hz and the frequency indicated.

5. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

6. A-weighting - Wikipedia

   en.wikipedia.org/wiki/A-weighting

   A graph of the A-, B-, C- and D-weightings across the frequency range 10 Hz – 20 kHz Video illustrating A-weighting by analyzing a sine sweep (contains audio). A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]

7. Airy points - Wikipedia

   en.wikipedia.org/wiki/Airy_points

   The Bessel points are located 0.5594 of the length of the rod apart, slightly closer than the Airy points. [2] [3] [7] Because line standards invariably extend beyond the lines marked on them, the optimal support points depend on both the overall length and the length to be measured.

8. AOL Video - Serving the best video content from AOL and ...

   www.aol.com/video

   The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.

9. Audiobook - Wikipedia

   en.wikipedia.org/wiki/Audiobook

   An audiobook (or a talking book) is a recording of a book or other work being read out loud. A reading of the complete text is described as "unabridged", while readings of shorter versions are abridgements. Spoken audio has been available in schools and public libraries and to a lesser extent in music shops since the 1930s.