In all feature pitches for HRTF emulation one stage of the process is conveniently left out – the headphones themselves. So, it sounds like we have this HRTF thing in the bag? Not quite. Products like Waves NX add the final touch – continuous head tracking, which is essential for sound source elevation perception. The Finns promise to calculate one’s head related transfer function (HRTF) from a 3D model which in turn is created from a series of 2D image the engineer takes on their own with a smartphone. Genelec has gone even further with their new Aural ID tech. What these numbers should be can be calculated from real world measurements of a person’s head. The next level is achieved by adjusting the timing of crossfed signals, after all – if a sound hits you from the left side, it takes some time for it to wrap around your head and get into your right ear. There’s the simple option of offering a frequency dependent channel bleed, called crossfeed. Taking care of the specific imaging a headphone offers is less straightforward.
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Some of our clients have actually learned how to mix bass on them. Still, the two Achilles heels of headphones remain – the in-your-head sonic image and the lack of a physical full body sound experience.Ĭombating the lack of visceral impact in headphones can be attempted with bass shakers like the one from Subpac. In the last 30 or so years headphone listening has taken off, as has headphone use for critical audio monitoring previously relegated exclusively to speakers. A necessary peripheral to be used when speaker listen is impossible or unfeasible. Traditionally headphones have been thought of as an audio accessory.
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