A new method of audio noise reduction based on the -spectral derivative- instead of the usual -energy in a band- is proposed. The algorithm has been realized in a system utilizing dynamic filters to sense the upper corner of the audio spectrum and adjust the system to pass frequencies up to the corner. With the proper dynamics, the filter can pass the full bandwidth of the signal, suppress wide-band noise, and reduce the apparent noise with little perceived effect.

Author: Ives, Fred H.
Affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA
JAES Volume 20 Issue 7 pp. 558-561; September 1972
Publication Date: September 1, 1972

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.