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. 2019 Apr 26;40(2):154–161. doi: 10.1055/s-0039-1684044

Figure 2.

Figure 2

( A ) SIOP Boston Grade 0. According to the minimum test battery, 4,000 Hz is tested first (denoted “1”) and with hearing threshold ≤ 20 dB HL, 8,000 Hz is tested second (denoted “2). With 8,000 Hz ≤ 20 dB HL, testing is done. ( B ) SIOP Boston Grade 1. According to the minimum test battery, 4,000 Hz is tested first (denoted “1”) and with hearing threshold ≤ 20 dB HL, 8,000 Hz is tested second (denoted “2). With 8,000 Hz > 20 dB HL, 6,000 Hz is tested third (denoted “3”). ( C ) SIOP Boston Grade 2. According to the minimum test battery, 4,000 Hz is tested first (denoted “1”) and with hearing threshold > 20 dB HL, 2,000 Hz is tested second (denoted “2). With 2,000 Hz ≤ 20 dB HL, 3,000 Hz is tested third (denoted “3”). ( D ) SIOP Boston Grade 3. According to the minimum test battery, 4,000 Hz is tested first (denoted “1”) and with hearing threshold > 20 dB HL, 2,000 Hz is tested second (denoted “2). With 2,000 Hz ≤ 20 dB HL, 3,000 Hz is tested third (denoted “3”). ( E ) SIOP Boston Grade 4. According to the minimum test battery, 4,000 Hz is tested first (denoted “1”) and with hearing threshold > 20 dB HL, 2,000 Hz is tested second (denoted “2). With 2,000 Hz > 20 dB HL, 1,000 Hz is tested third (denoted “3”).