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Precision Transfer Function Measurements Using
Program Material as the Excitation Signal
John Meyer, Meyer Sound Laboratories
Abstract from Proceedings of the
11th International AES Conference, 1992
Test and Measurement Conference
Factors affecting source-independent measurements of loudspeaker systems and concert halls are discussed. The concepts of sparse and sufficient excitation signals are introduced, and the effect of such signals on the computed transfer function is explained. Four algorithms to obtain precise transfer function measurements with program material excitation are introduced, and are shown to produce amplitude accuracy equivalent to that obtained with conventional FFT analysis with Gaussian noise excitation.
This is the abstract from John Meyer's AES paper but you can order the paper in it's entirety from the AES web site at http://www.aes.org/publications/conf.htm.
Equalization Using Voice and Music As The Source
John Meyer, Meyer Sound Laboratories
Abstract from Paper Presented at the
76th AES Convention, New York, NY, 1984
A source-independent technique to measure accurately the amplitude and phase response of sound systems in concert halls is discussed. Measurements may be made during live performances or events, using music or voice as the test signals. Correlation is shown between the impulse response and the results obtained using music signals. An equalizer which corrects for many room resonances in both amplitude and phase simultaneously has been developed. The effect of this equalizer on concert systems in an existing venue is shown.
This is the abstract from John Meyer's AES paper but you can order the paper in it's entirety from the AES web site at http://www.aes.org/publications/preprints/search.html.
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