Can we use the aircraft Flight Interphone System in our cars to communicate?

Recently came up with the idea to make the most of the Stay at Home period. I thought it would be great if I could implement a system in my Nissan Patrol 160 to ameliorate tiresome in-car communication process and make traveling in noisy older trucks and SUVs a more enjoyable experience. This is why I decided to use the aircraft flight crew interphone system model which incorporates a set of microphones, headphones, and amplifiers to transmit and amplify audio signals, enabling the flight crew to hear incoming conversations from other crew members among noises mainly caused by ram airflow surrounding the cockpit.

To design the system, I had a quick search to find out the electronic components I was going to need in the design of the main circuit. Hopefully, there are lots of images and helpful articles about telecom circuits on the web and how they operate. After gathering the necessary data and asking one of the avionics colleagues of mine for expert advice, I decided to use the LM386 IC as the primary audio amplifier circuit because of its low cost and availability. Capacitors, resistors, and potentiometers were among the electronic components I used in the circuit. After procuring primary components, I used Proteus electronic design automation software to make sure the system architecture is fine and free of errors. Then I set up the prototype of the circuit on a breadboard to ensure the integrity of the system.

Finally, the whole PCB was completed and put to test in my car. I was quite excited to see the results and fortunately, everything seemed perfect. The only thing was that to eliminate the need for expensive headsets featuring noise cancellation circuits, I had to increase the power of the circuit to overcome the surrounding noises in the car environment. This was how I decided to integrate a computer speaker amplifier in the circuit

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This was the whole process. It wasn’t about designing a complicated PCB but was quite interesting to me as a mechanic to work with PCBs, breadboards, and PCB design applications. As an aircraft mechanic and maintenance engineer, I found it a great opportunity to acquire manual dexterity and hand-on experience in electronic applications and put the electrical and electronic knowledge I have gained through studying avionics subjects and courses into action.