Technology is amazing. In a very short span of time we have moved from an age of analogue audio and video to digital imagery and sound – and we’re still progressing. With modern devices, we’re able to tune into and pick up even the most subtle tones, such as the echo of a violin string squeaking amid an orchestra.
Unfortunately despite all of our advancement in audio, those working in forensic audio still find themselves in situations where a very important message somehow doesn’t come out the same way it went in. Hence many companies come up with the idea of video enhancement software where enhance CCTV footage helps the end-user to present with the versatile user interface that allows for interactive change of processing parameters and interactive geometry selection.
Masking noises are probably the biggest culprit for many. Not only from the ambient sounds of a room and the surrounding environment, which can make some recordings seem completely useless, but from electronic interference in the area that jumbles equipment and creates issues that can’t often be corrected on site.
Sometimes the interference isn’t recognized until after the fact, when it’s too late to correct the issue. Of course there’s always equipment to fix problems with other equipment; audio enhancement and noise reduction has been used for years to deal with issues relating to interference and masking noises.
Audio enhancement techniques have been useful both in a commercial setting – where lecturers and other speakers can have discussions or dictations cleaned up – or in forensic situations where the actual audio could mean the difference between a conviction or an acquittal.
The equipment used is another roadblock and can drastically distort the quality of a recording. Often problems can be blamed on dated equipment that’s not properly configured but even new, cheaply made equipment or improperly used equipment can create similar problems. Modern audio enhancement techniques can counter the problems that arise from using older analog equipment or situations where digital recorders were used improperly.