Figure 1a.

The Audiological Input screen from the NAL-NL1 software system with the entered values in the top graph and the adult-equivalent hearing loss displayed in the bottom graph on each screen. Figure 1a shows thresholds measured with insert earphones and recorded as audiometer dial readings in dB HL. The child's real-ear-to-coupler difference (RECD) was also measured using insert earphones and custom earmolds, and was entered in the same screen by selecting Measured under RECD. Figure 1b shows thresholds measured with a loudspeaker in the sound field, and recorded as dB sound pressure level (SPL) in the sound field.