Add "passenger to pilot" talk to your future road trips. This uses 12 volt battery power supply with two LM386 IC low gain (around 20 on gain) amplifiers.
In simulator, the two 2 kHz. generators, 1 uf., with switches is where two electret microphones would be connected and 16 ohm resistors is where earphone (stereo or mono earphones) connections are located.
Both 4.7 resistors are rated .5 watts.
Headphone output of one side is paired to microphone output of other side. Earphones need to be small enough to fit inside motorcycle helmet. Electret microphones need to be close to mouth because of wind and road noise.
