Digital Hearing Aid using MKL02Z16VFG4

Digital Hearing Aid using MKL02Z16VFG4


A hearing aid is a small electronic device worn in or behind the ear that amplifies incoming sounds to help people with hearing impairment. This design features a light and compact hearing aid with a soft touch sensor that allows the user to control the volume and frequency depending on the user’s preference.

This design uses MKL02Z16VFG4, an energy and size efficient microcontroller that serves as the main component of the system. It receives the signals from the sensor and microphone, and then sends the processed signal to the speaker. The system uses two amplifiers, a class AB preamplifier and a class D amplifier, both in small packages as it is desirable for the device. It is also equipped with a sensor using Si1102-A-GM that enables the user to change the volume and frequency with a simple touch. Other components can be added, such as a Bluetooth remote control.

This design is applicable for hearing aids and other sound amplification needs. Its lightweight feature makes it portable for daily usage.

Digital Hearing Aid using MKL02Z16VFG4 – [Link]

Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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1 Responses

  • Audioguru
    7 September, 2015 at 5:39 pm

    I recently turned 70 years old and ran out of excuses about people mumbling and radio and TV sounding bad. I got my hearing tested and a 3 months free test with the latest digital hearing aids. What a difference! My hearing had normal fairly severe high frequency loss due to old age so the aids were programmed for it in 3 steps with 2 weeks between each step. The first step boosted the highs a little then each step boosted more so I could get used to it.

    The aids are each powered from a tiny 1.45V cell that last for 1 week and use Bluetooth so that both do the same programs. I have 4 programs selected from a tiny pushbutton on either one: 1) wideband music without anti-feedback control, 2) very sensitive, 3) not much boost and 4) automatic.

    The sensitive program allows me to hear things that are very faint or far away.
    The not much boost program reduces loud noise like children screaming and motorcycles.
    The automatic program has anti feedback control that makes music sound odd, selects front microphones or rear microphones depending on where it hears speech and has automatic gain control for gradually less pickup of background noise when it hears no speech.

    I am renewed. I had a heart attack so I survived then got my heart arteries fixed with stents, I had cataracts in my eyes so I got new lenses in them and I recently got hearing aids. Now my health, vision and hearing are better than when I was young.

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