Unlike other organs, like your liver or skin, your ear doesn’t regenerate . Those tiny hairs on the nerve cells that pick up all the different frequencies before sending them to your brain degrade over time. The hairs tuned to high frequencies are physically located closer to the ear opening and so experience more stress and are the first to go. The older you are, the more sound your ear has experienced and the harder it is to distinguish high pitches. (Youtube’s compression algorithm messes up the 19,000 HZ signal, and make sure you use headphones rather than ear buds.)
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.