Abstract: This report describes a modified rhyme test (MRT) conducted to characterize the behavior of digital and analog communication in the presence of background noise and moderate RF channel degradation. This is done through the use of reference systems to provide a manufacturer-independent perspective on this issue.
Keywords: intelligibility; Project 25; vocoder; modified rhyme test; noise; analog FM; land mobile radio; LMR; public safety; fire service
Complete report in PDF format
The full report is available at http://www.its.bldrdoc.gov/publications/2720.aspx