The goal of a sound system design is to achieve good quality reproduced sound. The perception of this quality in quantitative terms depends on the loudness, frequency response, and construction of sound arriving at the listener. These factors are affected by both the acoustical environment and the sound system's performance. For speech signals, the index of quality is speech intelligibility; for music, the index is primarily frequency response and secondarily distortion. This paper shows that accurate predictions of speech intelligibility and sound pressure level must consider both phase and magnitude information for sound arriving at listener. Two prediction algorithms are described and validated by the results of tests made in real rooms. The algorithm to accurately predict MTF-STI is based on the fundamental principle of MTF-STI. The second algorithm, for the accurate calculation of sound pressure level, utilizes a digital filter response and digital signal processing techniques. Both algorithms are suitable for implementation in practical sound system design software for personal computers.
Author:
Mochimaru, Akira
Affiliation:
Altec Lansing Corporation, Oklahoma City, OK
AES Convention:
89 (September 1990)
Paper Number:
2996
Publication Date:
September 1, 1990
Subject:
Modeling of Acoustic Spaces
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.