TABLE 1.

Specification of the minimum and maximum hearing level, which can be produced by the tone generator of the iPad using the app.

Frequency (Hz)	Lower limit (dB HL)	Upper limit (dB HL)
125	−20	75
250	−20	100
500	−20	110
750	−20	110
1000	−20	110
1500	−20	110
2000	−20	110
3000	−20	110
4000	−20	110
6000	−20	100
8000	−20	90