Audio Clarification
There are several tools a forensic expert uses when clarifying audio recordings. First, the noise is removed using noise reduction software and hardware. Next, using various types of equalization, the desired sounds are clarified by equalization processes. Volume may be increased or decreased during this clarification processes. Normalization and compression may also be applied.
When an audio recording has been professionally clarified for playback by a forensic expert, it is important to understand your playback options depending on what your goals are.
Each CD playback system has different characteristics. One small portable CD player will playback the clarified recording differently than another.
When listening to the clarified recording, it is best to try different CD players because each person has a different sound perception. That sound perception is similar to reading with glasses. It can be said that each CD player’s sound characteristics is similar to a how reading glasses have different magnification.
Therefore, when you listen to your clarified CD, try different CD playback systems. More than likely, smaller portable CD players will yield the best results.
When transcribing your audio evidence for written presentation, wearing headphones will provide you with the best results.
When playing the clarified audio recording in court, also test various CD players, boom boxes and amplifiers until you have your desires outcome.
