The primary complaint of hearing-impaired persons is difficulty in background noise. The measurement of SNR loss (signal-to-noise ratio loss) is important because speech understanding in noise cannot be reliably predicted from the pure tone audiogram (Killion & Niquette, 2000). A list of six sentences with five key words per sentence is presented in four-talker babble noise. The sentences are presented at pre-recorded signal-to-noise ratios, which decrease in 5 dB steps, from 25 (very easy) to 0 (extremely difficult). The SNR’s used are 25, 20, 15, 10, 5, and 0, encompassing normal to severely impaired performance in noise.