Frequency-Modulation (FM) Technology as a Method for Improving Speech Perception in Noise for Individuals with Multiple Sclerosis

• DOI: 10.3766/jaaa.17.8.7
• Publication Date: 2008-04-22T23:54:28Z
• Authors: Samantha M. Lewis; Michele Hutter; David J. Lilly; Dennis Bourdette; Julie Saunders; Stephen A. Fausti
• Keywords: Modulation (music)

Almost half of the population with multiple sclerosis (MS) complains difficulty hearing, despite having essentially normal pure-tone thresholds. The purpose present investigation was to evaluate effects frequency-modulation (FM) technology utilization on speech perception in noise for adults and without MS. Sentence material presented at a constant level 65 dBA Leq from loudspeaker located 0°azimuth. microphone FM transmitter placed 7.5 cm this loudspeaker. Multitalker babble four loudspeakers positioned 45°, 135°, 225°, 315° azimuths. starting presentation 55 Leq. increased systematically 1 dB steps until subject obtained 0% key words correct IEEE (Institute Electrical Electronic Engineers) sentences. Test results revealed significant differences between unaided aided conditions several signal-to-noise ratios.