The goal of audio restoration and enhancement is most often to make it easier to understand a voice in a recording (spoken word like speeches, conversations, etc). Striking a balance between creating an understandable voice and removing every last bit of noise is an art in itself. Since different types of noise reside in the same frequency spectrum as the voice (and often at the same time), careful consideration must be made to reduce the noise as much as possible without compromising the quality and strength of the spoken word signal.

The iPhone office recording was cleaned up and made louder to make the voice easier to understand. 

The MP3 recording in an urban environment was an example of the worst possible scenario: a LOT of traffic noise, a very quiet recording overall, and recorded in MP3 format at 32kbps (which is the lowest quality recording possible on most modern recorders). After a little bit of cleaning and making the voice louder, it was much easier to understand. 

MP3 Recording (32kbps) - Urban Environment AFTER

MP3 Recording (32kbps) - Urban Environment BEFORE

iPhone Recording - Office Environment AFTER

iPhone Recording - Office Environment BEFORE

My name is Phil Woolley and I'm the owner of Woolley Audio. 

Woolley Audio provides music mixing and mastering services, as well as audio restoration and enhancement services. 

Email me for a quote:  WoolleyAudio@gmail.com