An Experimental Method to Determine the Cut-Off Frequency of an Acoustical Free Field in a Non-Ideal Environment

• 作者: Mohammad Al Zubi
• 来源期刊: 声学期刊(英文)
• 学科: 医学
• 关键词: ACOUSTICS CUT-OFF Frequency SOUND FIELDS Noise
• 年，卷（期）: 2018,（1）
• 页码范围: 1-11
• 页数: 11页
• 分类号: R73

摘要

The availability of ideal conditions like anechoic chamber to characterize some sound parameters, like sound intensity and sound power necessities the determination of free field and cut off frequency measurements. In this article, full experiment was executed at Wayne State University (Detroit-Michigan), to determine the cut off frequency in all directions;the obtained results showed that the free field can be determined for a specified space. So other tests can take place in this space avoiding regions where reflections and consequently noise can be found. Upon these results tests related to noise abatement in vehicles can be done in such environment.