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. 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. By clicking here you can have product information sent by mail or e-mail us with your questions and comments.