Receiver Length Selection: Choosing the right receiver unit length is essential to patient comfort, a secure fit, and an appropriate directional response from the hearing aid. Sonic Touch fits on the ear rather than behind it. Use the fitting tool included in the Sonic Touch Receiver and Dome Kit to select the proper receiver length. There are 4 sightlines on the tool as shown below:   Place the fitting tool on the top of the ear and in contact with the skin in the narrow gap between the head and the top of the ear, while keeping the horizontal line level. From the three sightlines, choose the one that best matches up to the upper edge of the ear canal. If the top of the ear canal falls between 2 choices, the shorter one is usually best. You may need to change the angle of the receiver slightly for better comfort and fit (bending carefully).

Dome/Custom Tip Selection:
Selecting the appropriate dome for the fitting range and confirming that the software configuration matches the dome being used is crucial to your fitting. Do not mismatch the dome type in the software to what is physically on the receiver as this might result in feedback or other sound artifacts.

• Both power domes and custom molds are effective and are often a matter of patient preference.
• Power domes do not fit in all ears so you may need to resort to a custom mold for your patient.
• If the Open Dome is too large for your patient’s ear canal, attach the dome and trim off the “petals”. With this, the patient maintains superior wax protection and the ear canal is still protected.
• The foam that surrounds the receiver is only meant to protect it during shipping – please remove this foam collar prior to attaching the dome.

Fitting Level:
For new users, it is best to start at Fitting Level 1. For experienced users, you may start at Fitting Level 2 or higher. The paper crinkle test should be used at this point to determine the correct fitting level. If crinkled paper sounds like plastic or metal, decrease the fitting level (down 2 dB on the 5 line, down 1 dB on the 9 line) until it sounds like paper.

Getting Universal Correct:

• Trust the Best Fit Fast defaults. If there are complaints of sharp impact sounds, decrease the 5 and/or 9 line at 1000 Hz & 1500 Hz.
• Consonant Echo
  • If a patient reports a “sissy sound” tracking consonants, decrease the gain by 2 dB on the 5 line at 3000, 4000, and 6000 Hz.

Programs:
Start with the default programs during your first fitting. Add or adjust programs as necessary for your specific patient’s needs and desires.