The values of the comfort maximum gain values are usually expressed in dB values that will be very amiliar to people who have fitted hearing aids then calculate initial Comfortable Levels for
the our stereo. The fitting software will probably have an in-situ measurement
Average CUNY sentence scores in quiet at 3 input levels, and in noise for 19 listeners in a blind trial comparison of ADRO and WDRC.ADRO was also evaluated with speech in background noise.ADRO than for WDRC. A paired t-test (t = 3.81, df = 18, p < 0.01) showed that this difference
was statistically significant. This advantage of ADRO over WDRC in noise was achieved
without additional noise reduction algorithms, showing that noise reduction is “built in” to
ADRO.They have a clear and intuitive interpretation: larger values indicate louder output, and
smaller values indicate softer output sounds. There is no need to predict complex cross-over
frequencies, kneepoints, and compression ratios.
There are four easy steps to fitting an ADRO hearing aid:
Enter the audiogram. The fitting program will next step.
Balance loudness across frequencies at a comfortable level. This is like setting the graphics
equalizer on facility to generate narrow-band noises with controlled level and frequency inside the hearing aid. The audiologist (or the listener) should adjust these until they are in the comfortable range and equally loud across frequencies. This should take no more than a few minutes per ear.
There is no need to establish the Maximum Comfortable Level or to do Loudness Scaling. The
fitting software will automatically calculate the initial ADRO fitting from the audiogram and the
Comfortable Levels.
Adjust the overall volume to the preferred level for conversational speech. This is like
adjusting the volume on your stereo – one adjustment makes everything louder or softer.
nd noises are too loud, the maximum
igure 4. Steps required to fit an ADRO hearing aid illustrated with screen
shots from the Configure™ software used in the clinical trials of ADRO.
SUMMARY
The introduction of digital signal proce
aids has enabled the development of
new algorithms such as the ADRO amplifier. ADRO is easy to fit to any hearing loss, from
mild to severe, in an interactive and intuitive manner with the client. Once the hearing aid has
Different clients will have different preferences, even if they have the same audiogram. Just
turn on the hearing aid and have a natural two-way conversation with the client while you are
adjusting the volume. It is much easier for clients to choose the best volume setting this way
than to rely on loudness scaling with beeps and pure tones.
Fine tune Maximum Gains and Maximum Output Levels (if necessary). The Maximum
Gains control the loudness of soft sounds. If soft backgroud should be reduced at the appropriate frequencies. If soft speech is too soft, the maximum gain should be increased. The low-frequency maximum gain settings can also be used to change the sound of the client’s own voice. The high-frequency maximum gain settings can be reduced to avoid feedback if necessary. The Maximum Output Levels (MOLs) control the loudness of sudden loud sounds. If loud sounds sound distorted, then the MOLs should be raised. If sudden loud sounds are uncomfortable, then the MOLs should be reduced at the appropriate frequencies