Skip to main content
For professionals

All Virto Models

Virto P-312 

Phonak Virto P 312 hearing aid
Fitting guides

Virto P-Titanium

Phonak Virto P Titanium 10 Omni hearing aid
Fitting Guides

Virto P-312 NW O

Phonak Virto P 312 Omni hearing aid
Fitting Guides

Virto P-10 NW O

Phonak Virto P 10 Omni hearing aid
Fitting Guides

Model of Acoustically Optimized Vent.

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?
  • 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 select V. A review of internal data shows that hearing aids with AOV are returned less often than those with a manually-selected vent.1
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.

You may also like

Partner with us

As a Phonak partner, you’ll get access to one of the industry-leading hearing solutions, our extensive resource library, marketing support to help your business grow, community events, training, and more

Side view of female nurse working at computer desk against window in office


1 Leuthold, N. (2019). Internal Phonak report. Please contact if you are interested in further information.