The Use of Reflectors to Shape a Sound Field
Report Number: AFFDL TR 70-97 Author: Manning, Jerome E. Author: Moore, James A. Corporate Author: Bolt, Beranek and Newman, Inc. Laboratory: Air Force Flight Dynamics Laboratory Date of Publication: 1971-03 Pages: 126 Contract: F33615-69-C-1384 Project: 4437 Task: 443701 AD Number: AD0883946Contrails does not possess a copy of this report. Click here to offer Contrails a donation of this report
Abstract: The use of reflectors to control the distribution of the Sound Pressure Level (SPL) in sonic test chambers is investigated. The goal is to obtain more realistic SPL distributions on the test object. It is concluded that the use of reflectors will not increase the SPL on a test object unless the reflector and test object are in the near field of the sound generators. The results of the study are applied to the Air Force Flight Dynamics Laboratory's (AFFDL) Sonic Fatigue Facility at Wright-Patterson Air Force Base. Design charts are presented that relate predicted SPL distributions to reflector size and positioning.