Method of automatically fitting hearing aid

A method of fitting a hearing aid, by amplifying a 70 dB SPL long term speech spectrum noise generated from an automatic fitting device in the hearing aid, and measuring gains and SSPLs of the amplified sound of the hearing aid by a probe tube microphone, in a state in which the hearing aid is worn by a test subject with the probe tube microphone inserted into the external ear canal, the method including the steps of:

• (1) entering an audiogram of a test subject;
• (2) defining criterion gains and SSPLs depending on the test subject's audiogram, based on the criterion gains and SSPLs installed in the automatic fitting device, the criterion gains and SSPLs being standardized in real ear measurement for each level of hearing loss in each test frequency band;
• (3) generating the 70dB SPL long term speech spectrum noise, and monitoring and measuring the gains and/or SSPLs of the amplified sound from the hearing aid in front of the test subject's eardrum by means of the probe tube microphone, starting at 250Hz and consecutively fitting the upper next frequencies upto 6000 Hz, from a predetermined minimum gain and/or SSPL of the hearing aid;
• (4) comparing the measured gains and/or SSPLs with the criterion gains and/or SSPLs and if the measured gains and/or SSPLs are less than the criterion gains and/or SSPLs, increasing the gain and/or SSPL of the hearing aid and repeating measurement;
• and
• (5) if the measured gains and/or SSPLs becomes equal to the criterion gains and/or SSPLs, setting the gains and/or SSPLs of the hearing aid at that time as an actual gain and/or SSPL of the hearing aid and saving the automatic fitting device.