AUDIO FILES NOISE REDUCTION

I have 7 WAV audio files that need to be cleaned up, each between minutes in length.
The primary issue is background noise.
I'm looking for a professional with experience in audio editing and noise reduction to enhance the sound level and quality.
Since these are recorded at a conference, I expect to have some background noise, just want to see if it can be brought down some.
File1 = 33 minutes File2 = 24 minutes File3 = 27 minutes File4 = 25 minutes File5 = 39 minutes File6 = 37 minutes File7 = 43 minutes Ideal skills include.
- Proficiency in audio editing software - Experience with MP3-WAV files - Ability to reduce background noise effectively - Attention to detail Included is a WAV file sample of one the actual recordings.
Please provide examples of similar work you've done in the past.
Serviços de audio Produção de Áudio Talento Vocal Sound Design Música ID do Projeto.
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