2Ricketts T,Henry P,Gneuikow D.Full time directional versus user selectable microphone modes in hearing aid.Ear Hear 2003 ;24(5):424-39.
3Thompson SC, LoPresti JL, Ring EM. Noise in miniature microphones. J Acoust Soc Am 2002;111(2):861-6.
4Ricketts T,Mueller HG.Predicting directional hearing aid benefit for individual listeners. JAm Acad Audiol 2000; 11(10): 561-9.
5Hornsby BW,Ricketts TA.The effects of compression ratio, signal-to-noise ratio, and level on speech recognition in normal-hearing listeners. J Acoust Soc Am 2001; 109(6):2964-73.
