system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Talking on radio transmitter at 50% speed of light.

What would it sound like if I am traveling at 50-90% the speed of light and communicated to a stationary person via a radio transmitter?  Would my voice be slow?
gpt
There are two things that are going to have an effect here.

1) Doppler effect (which depends on the relative locations of you and the stationary observer)

2) Relativistic effects (time dilation primarily)

In any case, the effects will likely result in the fact that the radio reciever won't even recognize your signals, unless it's designed to account for that.