NSR member, Bob Manson, has researched, and written a very interesting paper on the use of sound during searches to locate subjects.
As any searcher knows – sound is one of the most important ways to locate someone. However, environmental factors and type of sound dramatically affect how well we can hear and where the sound appears to be coming from.
A must read for any searcher.
The paper can be found here (PDF) – http://www.jibc.ca/emergency/Other_Resources/Publications/Miscellaneous_EMD_Publications/Sound_Search_Study.pdf