ABSTRACT
Reports published in the literature argue for the need to develop standardized methods for assessment of insulating power demonstrated by barriers based on phononic crystalline structures. Some authors suggest application of standardized methods in which effectiveness of such structures is assessed based on measurements of the impulse response in free field with the use of an appropriate time window to eliminate, among other things, undesirable reflections. The sound intensity vector distribution patterns presented in this chapter suggest that standardized methods developed for assessment of effectiveness of continuous barriers may turn out to be inadequate for the purpose of assessment of sound insulating power in the case of barriers based on phononic crystalline structures.
