Abstract
Many workers in the field of acoustics have found that measurements must be performed in nonideal environments in which error contributions from reflections and diffractions can be significant. Furthermore, creation of satisfactory acoustical measurement conditions (e.g., anechoic or reverberant rooms) can be costly both in dollars and space. Use of acoustic pulsetrains of infinite duration has definite advantages for measurement of reflection and transmission coefficient of achitectural panels and for measurement of sound pressure level effects of full-size or scaled noise reduction systems. The experimental pulse system at North Star is described and application of pulsetrain techniques to measurement of reflection, transmission, and sound-pressure-level reduction of scale- and full-size systems is discussed. Experimental results are given for transmission and reflection from architectural-type panels and for a scale model of a highway barrier.
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