There is no known physicist named "Ernesto Sonido". It's possible that:

* There's a misspelling: Perhaps the name is slightly different. Can you double-check the spelling?

* A less known figure: It's possible this individual made contributions in a very specific area of physics or is not widely known outside their research community.

* A misunderstanding: Maybe you're thinking of someone else entirely. Can you provide more context about what you're looking for?

Please provide more information, and I'll do my best to help you find the information you're looking for!