Evaluating STI and MTF with Time Delay Spectrometry

20. Evaluation of Room Speech Transmission Index and Modulation Transfer Function by the Use of Time Delay Spectrometry

Publication Date: 1988-05-06

The literature shows that the modulation transfer function (MTF) and speech transmission index (STI) can be computed from the squared impulse response of a linear passive system. This paper describes an extension of this method to measurements of systems using time delay spectrometry (TDS). The new method makes use of both the real and imaginary parts of the complex analytic impulse response of the system (the energy-time response). This allows more accurate determination of STI and MTF because the calculations are based on measurements that more closely follow the true energy decay in the room.

Click to Browse

Keele, Jr., D. B. (Don); 1988; Evaluation of Room Speech Transmission Index and Modulation Transfer Function by the Use of Time Delay Spectrometry [PDF]; Techron, Div. Crown International, Inc., Elkhart, IN; Paper 6-006; Available from: https://aes2.org/publications/elibrary-page/?id=4647

Don’t worry about people stealing your ideas. If your ideas are any good, you’ll have to ram them down people’s throats.
Howard Aiken, IBM engineer

NOTICE!
Please note that these materials are presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author’s copyright. These works may not be reposted without the explicit permission of the copyright holder
Note that one has to respect the copyright and to ask permission to the copyright owner if one wants to print or use a paper.