Hefio – Individually optimized sound

Your sound profile in 10 seconds with a single click

Hefio is taking a completely different approach towards a fully personalized hearing experience. Our self-calibrating headphones are capable of producing a sound spectrum that is individually optimized for your unique ears.


The built-in microphones capture the sound inside the ear canals.


The standalone Signal Processor analyzes the sound and makes an accurate estimate of the sound spectra at the eardrums.


Now you are ready to enjoy the perfect audio optimized for your unique ears!

Your ears are unique.

Individual differences between the in-ear spectra within a test group of 60 subjects with similar physiological characteristic.

Did you know that we all have very different ears and hearing systems? There is a great deal of variation between individual sound perceptions coming from the same source. Even more surprisingly, your right and left ears have their own unique characteristics.

Modern headphones don’t take individual differences into account. It is similar to wearing someone else’s glasses. This leads to a problem. The sound is always colored. This results in reduced sound quality for all users.

Hefio are the only headphones that deliver the sound as the producer created it or as it is in reality.

Hefio Play are your perfect headphones!

Latest news

Hefio teams up with Genelec and IDA Audio to advance individual calibration for demanding headphone applications

Today, a Finnish startup Hefio Oy developing personal optimization…

Sound Magic?

Sound Magic? Read the whole post from Startup Sauna blog…

Looking for Programmer

Since its founding in 2014 Hefio has been developing technology…

International Congress on Sound and Vibration

Hefio will be attending the 23rd International Congress on Sound…

Audio Engineering Society Paris 2016

From the 4th (Saturday) to 7th (Tuesday) of June Hefio will…

Hefio Demo Day

  Next Friday the 13th (May) from 10 to 18 you are…