Apparently on the basis of room modes being excited in residential dwellings, one concept has been to ignore high quality field measurement recordings (wave files) and use the narrow band (FFT) Leq results of a 10 min sample to create, by superimposing a number of sine waves, a trapezoidal time signal as the source for subjective testing and restricting the bandwidth to only infrasound. Other testing utilizes full spectrum signals but has limitations on having an accurate signal due to the limitation of the speakers. An examination of both methods and the limitations of the results have been examined and will be discussed.