Fundamental concepts in testing audio equipment are reviewed, beginning with an examination of the various equipment architectures in common use. Several basic analog and digital audio measurements are described. Trade-offs inherent in the various approaches, the technologies used, and its limitations are discussed. Novel techniques employing multitone signals for fast audio measurements are examined and applications of sampling frequency correction technology to this and conventional fft measurements are covered. Synchronous averaging of ffts and the subsequent noise reduction are demonstrated. The need for simultaneity of digital and analog generation is presented using converter measurements as an example.
Author:
Cabot, Richard C.
Affiliation:
Audio Precision, Beaverton, OR
AES Conference:
UK 12th Conference: The Measure of Audio (MOA) (April 1997)
Paper Number:
MOA-02
Publication Date:
April 1, 1997
Subject:
The Measure of Audio
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.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
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.