Geert
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the human body actually has lots of specialized receptors for sound/vibration, e.g. People Hear with Their Skin as well as Their Ears.
What this article explains is how feeling air puffs that go along with certain letters ("p," "b", "t", "k"...) can support the identification of them. The other articles you linked dicuss another feeling, namely pressure. So:
- The skin doesn't hear sound, it feels air flow or pressure. Hearing and feeling are different sensations. And air flow and pressure or not sound. So no, we shouldn't extend the audible range with frequency ranges related to others senses. Otherwise we might as well add the frequencies of light to it to include eye sight, which also supports identification of sound.
- The skin doesn't identify sounds, it only supports what we hear for sounds that provide a clue via puffs of air.