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Pre- and Post-Emphasis Techniques as Applied to Audio Recording Systems

Audio Recorders benefit from pre- and post-emphasis which reshapes the noise spectrum to match human audibility thresholds. A 10dB increase in apparent dynamic range is realized for some digital-audio systems. A first order boost based on the CCITT J.17 pre-emphasis standard is shown to be appropriate for dynamic range expansion. A survey of peak acoustic levels present in 36 music performances is also included.

Author: Fielder, Louis D.
Affiliation: Dolby Laboratories, Inc., San Francisco, CA
AES Convention:78 (May 1985) Paper Number:2236 Import into BibTeX
Subject:Recording

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