Simple:
* The thick curtains effectively muffled the street noise.
Figurative:
* Her tears muffled the words she wanted to say.
Active:
* He muffled his laughter with his hand to avoid attracting attention.
Descriptive:
* The heavy snow muffled the sounds of the city, creating an eerie silence.
Specific:
* The sound engineer used acoustic foam to muffle the echo in the recording booth.
Humorous:
* She tried to muffle her sneeze with her elbow, but it was too late.
You can choose the best sentence based on the context and tone you want to convey.