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Determination of Sound Reduction Index by impulse response measurements

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Figure

Figure 1- Photo of the experimental set-up
Figure 1 shows the instruments used for the field measurement of R . 'In order to allow a comparison with the traditional technique, records are also made with a sine sweep signal excitation, during a period of 20 s, and ranging from 40 to 6000 Hz
Figure 3 - Reverberation Time. Comparison between New and Traditional techniques
Figure 5 shows a comparison, for D values, with high background noise concentrated at low frequencies

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