Pre- and Postemphasis Techniques as Applied to Audio Recording Systems

Pre- and Postemphasis Techniques as Applied to Audio Recording Systems

Audio recorders benefit from pre- and postemphasis, which reshapes the noise spectrum to match human audibility thresholds. A 10-dB increase in apparent dynamic range is realized for some digital audio systems. A first-order boost based on the CCITT J.17 preemphasis standard is shown to be appropria...

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Veröffentlicht in:Journal of the Audio Engineering Society 1985-09, Vol.33 (9), p.649-658
1. Verfasser: Fielder, Louis D
Format: Artikel
Sprache:eng
Schlagworte:
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Transduction
acoustical devices for the generation and reproduction of sound
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Zusammenfassung:Audio recorders benefit from pre- and postemphasis, which reshapes the noise spectrum to match human audibility thresholds. A 10-dB increase in apparent dynamic range is realized for some digital audio systems. A first-order boost based on the CCITT J.17 preemphasis standard is shown to be appropriate for dynamic range expansion. A survey of peak acoustic levels present in 36 music performances is also included.
ISSN:1549-4950
0004-7554