"Η οθόνη"

Translation: The screen

[JamesTWils]

That sounds like an odd derivation for ozone, since we usually preserve Greek ζs and θs.

[Phil682961]

In the audio, the θ sounds as if it has some voicing, like it's halfway to δ. Is that the usual pronunciation?

[G.Georgopoulos]

It's a "θ", although not a clear one. TTS can be confusing at times, not the best way to learn the pronunciation of a language.