Do you mean:
* "Sound analysis": This would be the study of how sound works, including its physical properties, how it is produced and transmitted, and how we perceive it.
* "Sound and...": You might be missing a word, such as "sound and music" or "sound and language".
* "Sound an a": This seems like a typo or misspelling.
Once you provide more context, I can give you a better answer.