The cochlear is vital to human listening to, and it performs an vital function in our understanding of complicated frequency content material. The Visible Ear undertaking goals to illustrate the cochlear mechanism as an academic device.
The cochlear itself is the a part of the ear that converts the strain waves of sound into electrical indicators for the mind. Completely different auditory frequencies excite totally different elements of the cochlea. The cells within the totally different elements of the cochlea then ship indicators to the mind similar to the sound it has picked up.
The Visible Ear demonstrates related habits on a strip of addressable LEDs. Decrease LEDs coded within the pink a part of the colour spectrum reply to low frequency audio. Larger LEDs step by means of yellow, inexperienced, and as much as blue, and reply to the upper frequencies in flip. That is achieved at a excessive response price with using a Teensy 4.0 working a Quick Fourier Remodel on incoming audio, after which outputting indicators to run a string of WS2812B LEDs. The result’s a visible band show of 104 bands spanning 43 Hz as much as 16,744 Hz, which covers most however not all the human vary of listening to.
It’s a powerful show, and one which makes an incredible music visualizer, too. When instructing the physics of human listening to and the cochlear, we will think about such a device could be fairly helpful.