Development and validation of an iPad-based Japanese language monosyllable speech perception test (iCI2004 monosyllable)

Figures & data

Table 1. The sound-presenting loud speaker and amplifier diagnosis standards used in this study.

Central frequencies of 1/3 octave band noises	Appropriate sound level ranges for each frequency
200 Hz	49.1 ± 4 dBA
500 Hz	56.8 ± 4 dBA
1000 Hz	60.0 dBA
2000 Hz	61.2 ± 4 dBA
4000 Hz	61.0 ± 4 dBA

Figure 1. Results for NH subjects in quiet and in noise. Error bars indicate the standard deviation for each condition.

Figure 2. Results for CI users in quiet and in noise. Error bars indicate the standard deviation for each condition.

Figure 3. A: All data for HA patients (in quiet: N = 105, SNR + 10dB: N = 37). B: Results for participants who performed testing both in quiet and in the SNR + 10dB condition (N = 35). Error bars indicate the standard deviation.

Figure 4. Distribution of scores for CI users. (Quiet, n = 226; noise, n = 103).

Figure 5. Distribution of the scores for HA users (quiet, n = 105; noise, n = 37).

Figure 6. Correlation between hearing thresholds and iCI2004 scores for NH controls (A), CI users (B), people with hearing loss but without hearing devices (C), and HA users (D) in quiet.