Enhance Old Audio Recording

I need an audio expert to improve the quality of an old speech recording. The current recording has muffled sound, and I want the voice to be clear and crisp.

Requirements:
- Remove background noise
- Boost volume
- Clarify muffled sound

Ideal Skills:
- Proficiency in audio editing software (e.g., Audacity, Adobe Audition)
- Experience with speech enhancement
- Attention to detail for high-quality output

Please provide samples of previous work.