Portable voice amplifier for masks/shields

This is an older version
Old versions
Very first version
Latest version
Few latest version amplifiers I built

Inspiration

My parents(doctors) used to come home from work exhausted because of the amount of energy that had to be spent to communicate with their patients with masks and face shields on. This is what led me to develop this voice amplifier which can fit on to both masks and face shields to make communication much easier.

What it does

The voice amplifier sits onto any mask / face shield with the help of neodymium magnets and the mic sits behind the device facing the user to capture their voice which is amplified , thus reducing the effort put in to communicate.

How I built it

I designed the case in fusion 360 and with the help of repeiter host and a 3d printer , printed it out. The circuitry consists of 6 main parts and they are the pre-amplifier, power amplifier, speaker, microphone, battery and a battery charger.

Challenges I ran into

Some of the challenges I faced were the proper removal of unwanted noise , choosing the right gain for the preamplifier, clipping of audio, waveform recreation and PCB fabrication.

Accomplishments that I'm proud of

I am proud to have successfully created a device that does exactly what the title says, and which also has helped the doctors who have used it.

What I learned

I learned quite a bit about waveforms, amplification, waveform recreation, frequency modulation and how not to solder an SMD PCB.

What's next for Portable voice amplifier for masks/shields

I hope to win this contest and further develop on the idea to size it down even further and help people by mass producing these units with the help from my friends.