How to pronounce “subsonic” in English

So when you actually heard it, it was subsonic.

So, it flies at subsonic speeds and it would be susceptible to being shot down uh from a variety of uh

over the course of the '40s and '50s, you're having the move from subsonic to transonic to supersonic to hypersonic flight.

These are all subsonic.

For example, when a sound is subsonic.

Nineteen Hertz at subsonic, so you wouldn't hear it.

These things make 19 Hertz subsonic frequency.