Oticon Opn Sound Navigator
Oticon Opn Sound Navigator


OpenSound Navigator is a noise reduction system
in Oticon Opn hearing aids. it works so fast and so precisely that it
can attenuate unwanted noise even between words. It continuously re-balances the soundscape
and provides constant access to all relevant sounds, and more importantly, to speech. An independent study has investigated the
effects of OpenSound Navigator. The study used pupillometry to test listening
effort and hearing in noise test the HINT to test understanding in noise. The study included 24 participants with mild
to moderate hearing losses. And the tests were done over a broad range
of listening conditions. This graph shows the results. On the X axis you see the listening environments
of everyday life from a quiet night at home to a dinner in a noisy restaurant. The noisier it gets, the lower the signal
to noise ratio. In these different sound environments we have
various degrees of speech understanding and this is illustrated on the Y axis. If speech understanding drops below 50%, it
becomes really difficult to follow a conversation. When only half of the speech information is
intelligible, the listener will have to rely heavily on guesswork. The dotted curve shows speech understanding
of a person wearing a well-fitted hearing aid with noise reduction switched off. Look how speech recognition drops significantly
as soon as the noise becomes louder than the speech. Or in other words, when the signal to noise
ratio becomes negative. So following a conversation at a crowded party
or at a noisy reception becomes almost impossible for hearing aid users. Now the solid curve shows what happens when
you turn on OpenSound Navigator. Now the signal to noise ratio corresponding
to 50% is lowered by an impressive 5dB. This means that with OpenSound Navigator,
users get access to environments where they were lost before. It allows hearing aid users to engage and
to participate even in very noise situations. Especially notice the data point at -4dB. A situation like this can be compared to a
noisy restaurant. Here speech understanding moved from 20 to
75%. This is the difference between isolation and
participation.

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