Today I will explain how I built an audiometric device using, Arduino Nano and a few other components.
To make it work, you need to plug the headset in your left year and then start increasing the volume until you hear a sound. When you hear the sound, you need to press the knob that will allow you to check on the next frequency.
The display will help you and give all the info required.

After checking the left ear, you will need to check the right one.
The red color represents the left ear, while the blue color represents the right one.
At the end of the sequence, you will see a graphical view of both ears. This will tell you the quality of you hearing at each frequency.

The electrical diagram and the sketch, are available to whoever request it from my YouTube chat.

Components:

• 1 Unicorn Hat Adafruit (#UnicornHat)
• 1 #Arduino #ArduinoNano
• 1 Rotary encoder with push button
• 1 push button normally open
• 1 knob
• 1Pin Jack email connector
• 1 disused earphones
• 1 OLED display 128x32
• 1 Electric Junction Box

Note: Be Aware, that this is not a professional device! And must be used only for fun purpose!

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#arduino