system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it the positioning of my body affects a wireless FM transmitter signal? (also, how can I boost this signal?)

I have a mp3 player wireless FM transmitter, and I've noticed several times that when I touch it or hover my hand above the transmitter the signal is boosted or clarified. That is, the static disappears from the audio. What causes this?

Also, is there something I can do to have this effect without hovering my hand above my mp3 player?
gpt
Capacitive coupling + shitty antenna in the transmitter and/or poor ground on the transmitter. 


A good performing antenna will not benefit from hand action, you're making up for a source of loss.

Two five foot wires, one to the ground of the transmitter (or to vehicle frame) and the other replacing the existing antenna on it would improve things.. (Dipole).