- AOV is designed to give clients the ideal combination of acoustic performance and wearing comfort based on their unique hearing loss and hearing aid configuration based on the ear anatomy.
- Selecting AOV eliminates the need to manually select the correct vent size for each client. This can result in a smaller and more discreet hearing aid
- HCPs benefit from selecting AOV. A review of internal data shows that hearing aids with AOV are returned less often than those with a manually-selected vent.1
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Phonak Virto™ Marvel
Virto Marvel M 10 NM O

Fitting guides
Product Info
Virto Marvel M 312 NW O

Fitting guides
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Virto Marvel M 312

Fitting guides
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Virto Marvel Titanium

Fitting guides
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Acoustically Optimized Vent (AOV)
Phonak’s proprietary AOV, is an algorithm which takes into account the unique characteristics of each client. AOV considers the unique characteristics of each client, including the audiometric configuration, risk of feedback, likelihood of occlusion, benefit of direct sound, and the need for low-frequency gain. The proprietary formula then creates an individualized vent size specifically for each client.
What is AOV?
How do I use it?
- AOV is the default vent selected for all custom hearing aids and earpieces ordered from Phonak. This means you only have to select AOV on the order form to get the benefits of an individualized vent for your client.

Titanium FitGuide for Virto M-Titanium
Thanks to the new Titanium FitGuide, over 50% of people get an even more discreet fitting Virto M-Titanium by an average of 2.5 mm. That is the difference between discreet and super discreet.
We are taking super discreet to the next level
The Titanium Fitguide indicates how deep the hearing aid can be placed in the ear.
How does it work?
Ear impressions are static but ear canals are flexible. The new Titanium FitGuide takes this flexibility into account and defines how deep the hearing aid can be placed in the ear canal.
Footnotes
1 Leuthold, N. (2019). Internal Phonak report. Please contact claims@phonak.com if you are interested in further information.