Table 1 shows the hearing thresholds in dB SPL of young adult, normal-hearing listeners for octave frequencies from 125 to 4000 Hz. Frequency (Hz) Threshold (dB SPL) 125 25 250 10 500 5 1000 0 2000 0 4000 5 Table 1 Table 2 shows the hearing thresholds in dB SPL of a patient with hearing loss. Frequency (Hz) Threshold (dB SPL) 125 25 250 15 500 15 1000 20 2000 30 4000 35 Table 2 Please calculate the hearing thresholds in dB HL of this patient, as shown in the audiogram. Frequency (Hz) Threshold (dB HL) 125 250 500 1000 2000 4000