Research On The Acoustic Field Characteristics Of The Supermarket Large Space

The relationship between supermarket large spaces and people’s daily life get more and more close in recent years. The acoustic environment of a supermarket has large impact on customers’ emotion and shopping quality. The acoustic field distribution in the space affects customers’ comfort directly. Therefore, it’s important to do research on acoustic field characteristics to improve acoustic environment of supermarkets.This paper involves investigation and surveys approach and then summariz es space features to choose classical supermarket spaces for researching. Through testing and analysis on classical supermarket space acoustic field characteristics, this paper provides the basis of reflection parameters setting by researching on sound features of goods shelf interface.Firstly, this paper confirms the uneven distribution of supermarket space acoustic field by field tests of classical operating supermarkets. Besides, acoustic environment of these spaces are much pliant to the number of local people but less affected by the number of total people.Secondly, through analyzing the distribution graph of sound pressure level parameter and reverberation time parameter by advanced measurements on both full and empty supermarket space with no users, getting the regular distribution patterns of basic acoustic field of supermarket spaces. The supermarket large spaces do not belong to ideal diffuse acoustic field, its sound pressure level becomes big when near sound source and small when far. Reverberation time is long when supermarket is empty but not when supermarket is full, which indicates that there’s no need to improve in normal use.Furthermore, we research on acoustic field characteristics from elements of the building space, and the influence of some factors on the characteristics of the supermarket’s acoustic field is obtained, the influence of the number of building walls around the sound source on the attenuation of sound is not obvious, the sound insulation effect of high shelves is significantly higher than that of short shelves, the best effect of sound insulation is achieved when the sound goes through the obverse side of high shelves vertically and obviously influenced by the kind of goods, the effect of horizontal and vertical direction is similar. Then it carries out the influence of the shelf to the acoustic field characteristics in large space supermarket.In the end, using experiments to study the acoustic characteristic of special shelf interface, determining the number of experimental group by ortho gonal method, studying on the acoustic characteristics of the shelf interface in a variety of situations, it is found that the phenomenon of acoustic reflection of shelves with partitions is more obvious than that without partitions, but the change of the density and arrangement of goods on shelves with partitions has less impact on the acoustic reflection, the difference can be ignored. Thus, reference and basis are provided for the setting of reflecting parameters of the goods shelf interface, and the basis are putted forward for the selection and design of the supermarket shelves.