Didn't know what time it was
And the lights were low-ow-ow
I leaned back on my radio-o-o
Some cat was layin' down some rock 'n' roll
"Lotta soul" he said

Then the loud sound did seem to fade
Came back like a slow voice on a wave of phase
That weren't no DJ that was hazy cosmic jive

Chorus --

There's a Starman waiting in the sky
he'd like to come and meet us
But he thinks he'd blow our minds
There's a Starman waiting in the sky
He's told us not to blow it
'Cause he knows it's all worthwhile
He told me let the children lose it
Let the children use it
Let all the children boogie

I had to 'phone someone
So I picked on you-oo-oo
Hey, that's far out
So you heard him too-oo-oo
Switch on the TV, we may pick him up
On Channel two

Look out your window, I can see the light
If we can sparkle he may land tonight
Don't tell your poppa or he'll get us locked up in fright

[Repeat Chorus]

There are hundreds of reports indicating radios being interfered with by the presence of unidentified aircraft or lights in the sky (or landed).
See Radios Affected By UFOs for more than 200 examples.

There are also a smaller number of reports involving interference to TV sets.
Here's an excerpt from George Hunt Willamson's 1959 book 'Road In The Sky,' that, like David Bowie's lyrics to 'Starman' encompasses the effect on both radio and TV caused by UFOs in their vicinity.....

During May, 1956, Mrs.Evelyn L.Smith and her family in Indianapolis, Indiana, had strange experiences connected with their TV and radio sets. One day, the Music on a radio programme stopped, and a strange voice said: 'You are masters of the Earth!' After that, the musical programme continued as before. Mrs.Smith, and her twelve-year-old daughter Rita, went outside to see if a UFO was in the vicinity, and when they looked up they saw two strange objects passing over their house. The objects circled the area twice and disappeared to the south-east. Later, in 1956, Mrs.Smith's father and mother, who live in the country, observed an enormous object above their house that was tilted on its side displaying a great dome. It suddenly seemed to 'dissolve' and reappeared in the opposite direction. her father said: 'It was as big as a house and the dome seemed to be as big as a court-house dome.' The object was very bright and finally disappeared. Mrs.Smith's sister also witnessed this sighting and was so frightened she ran into the house along with her mother.
The Smiths have a friend in Indianapolis who also heard strange voices and 'code' come over her radio and TV sets during 1956. When the woman went outside she saw UFOs over her house.