The Phonak Acoustic Leakage System (ALT) is a portable leakage tester to verify the correct sealing of custom (and universal) earplugs.

It simplifies the testing process, is fully portable and easy to use:

- Shows professionalism and checks the quality of the delivered product (security)
- Training effect : while doing the measurement, the users sees live (on the app) the effect of a possible incorrect positioning
- Possibility to document and keep a trace of the measurement report
- Manufactured for use with Phonak and AudioNova hearing protections
- Patented (Dynamic Ear Company)